Solid State Relays
Technical Information
Glossary
Terms
Meaning
Circuit functions
Input
Output
Characteristics
Others
Photocoupler
Phototriac coupler
Transfers the input signal and insulates inputs and outputs as well.
Zero cross circuit
A circuit which starts operation with the AC load voltage at close to zero-phase.
Trigger circuit
A circuit for controlling the triac trigger signal, which turns the load current ON and OFF.
Snubber circuit
A circuit consisting of a resistor R and capacitor C, which prevents faulty ignition from occurring
in the SSR triac by suppressing a sudden rise in the voltage applied to the triac.
Input impedance
The impedance of the input circuit and the resistance of current-limiting resistors used.
Impedance varies with the input signal voltage in case of the constant current input method.
Operating voltage
Minimum input voltage when the output status changes from OFF to ON.
Reset voltage
Maximum input voltage when the output status changes from ON to OFF.
Operating voltage
The permissible voltage range within which the voltage of an input signal voltage may fluctuate.
Rated voltage
The voltage that serves as the standard value of an input signal voltage.
Input current
The current value when the rated voltage is applied.
Leakage current
The effective value of the current that can flow into the output terminals when a specified load
voltage is applied to the SSR with the output turned OFF.
Load voltage
The effective supply voltage at which the SSR can be continuously energized with the output
terminals connected to a load and power supply in series.
Maximum load current
The effective value of the maximum current that can continuously flow into the output terminals
under specified cooling conditions (i.e., the size, materials, thickness of the heat sink, and an
ambient temperature radiating condition).
Minimum load current
The minimum load current at which the SSR can operate normally.
Output ON voltage drop
The effective value of the AC voltage that appears across the output terminals when the
maximum load current flows through the SSR under specified cooling conditions (such as the
size, material, and thickness of heat sink, ambient temperature radiation conditions, etc.)
Dielectric strength
The effective AC voltage that the SSR can withstand when it is applied between the input
terminals and output terminals of I/O terminals and metal housing (heat sink) for more than 1
minute.
Insulation resistance
The resistance between the input and output terminals of I/O terminals and metal housing (heat
sink) when DC voltage is imposed.
Operating time
A time lag between the moment a specified signal voltage is imposed to the input terminals and
the output is turned ON.
Release time
A time lag between the moment the imposed signal input is turned OFF and the output is turned
OFF.
Ambient temperature and
humidity (operating)
The ranges of temperature and humidity in which the SSR can operate normally under specified
cooling, input/output voltage, and current conditions.
Storage temperature
The temperature range in which the SSR can be stored without voltage imposition.
Inrush current resistance
A current which can be applied for short periods of time to the electrical element.
Counter-electromotive force Extremely steep voltage rise which occurs when the load is turned ON or OFF.
828
Recommended applicable
load
The recommended load capacity which takes into account the safety factors of ambient
temperate and inrush current.
Bleeder resistance
The resistance connected in parallel to the load in order to increase apparently small load
currents, so that the ON/OFF of minute currents functions normally.
Solid State Relays Technical
Information
Precautions and Notes on Correct Use
■ Life Expectancy (MTTF)
!WARNING
Do not touch the SSR terminal section (charged section) when the
power supply is ON. For SSRs with terminal covers, be sure to attach the cover before use. Touching the charged section may
cause electric shock.
Do not touch the SSR or the heat sink either while the power supply is ON, or immediately after the power is turned OFF. The SSR/
heat sink will be hot and will cause burns.
Do not touch the SSR LOAD terminal immediately after the power
is turned OFF. The internal snubber circuit is charged and may
cause electric shock.
• Do not apply excessive voltage or current to the SSR input or output circuits, or SSR malfunction or fire damage may result.
• Do not operate if the screws on the output terminal are loose, or
heat generated by a terminal error may result in fire damage.
• Do not obstruct the air flow to the SSR or heat sink, or heat generated from an SSR error may cause the output element to short, or
cause fire damage.
• Be sure to conduct wiring with the power supply turned OFF, or
electric shock may result.
• Follow the Correct Use section when conducting wiring and soldering. If the product is used before wiring or soldering are complete,
heat generated from a power supply error may cause fire damage.
• When installing the SSR directly into a control panel so that the
panel can be used as a heat sink, use a panel material with low
thermal resistance such as aluminum or steel. If a material with
high thermal resistance such as wood is used, heat generated by
the SSR may cause fire or burning.
■ Before Using the SSR
The mean time to failure (MTTF) of SSRs is 100,000 hours, which
varies with the operating conditions. To ensure long life and stable
operation, take proper countermeasures against extremely high or
low operating temperature, heavy fluctuations of ambient temperature, and/or long continuous energization.
■ Input Circuit
Input Noise
SSRs need only a small amount of power to operate. This is why the
input terminals must shut out electrical noise as much as possible.
Noise applied to the input terminals may result in malfunction. The
following describes measures to be taken against pulse noise and
inductive noise.
Pulse Noise
A combination of capacitor and resistor can absorb pulse noise
effectively. The following is an example of a noise absorption circuit
with capacitor C and resistor R connected to an SSR incorporating a
photocoupler.
Pulse width
All rated performance values listed in this catalog, unless otherwise
stated, are all under the JIS C5442 standard test environment (15° to
30°C, 25% to 85% relative humidity, and 86 to 106 kPa atmosphere).
When checking these values on the actual devices, it is important to
ensure that not only the load conditions, but also the operating environmental conditions are adhered to.
■ Zero Cross Function
An SSR with a zero cross function operates when the AC load voltage approaches the zero point or its vicinity, and releases when the
current reaches the zero point. An SSR with a zero cross function
reduces clicking noises that may be generated when the load is
turned ON.
C
Pulse voltage
The value of R and C must be decided carefully. The value of R must
not be too large or the supply voltage (E) will not be able to satisfy
the required input voltage value.
The larger the value of C is, the longer the release time will be, due to
the time required for C to discharge electricity.
Pulse width (µs)
Unexpected events may occur before the SSR is used. For this reason it is important to test the SSR in all possible environments. For
example, the features of the SSR will vary according to the product
being used.
R
Output (load voltage)
Input
ON
OFF
Pulse voltage (V)
Note: For low-voltage models, sufficient voltage may not be applied to
the SSR because of the relationship between C, R, and the internal impedance. When deciding on a value for R, check the
input impedance for the SSR.
Solid State Relays
Technical Information
829
Inductive Noise
ON/OFF Frequency
Do not wire power lines alongside the input lines. Inductive noise
may cause the SSR to malfunction. If inductive noise is imposed on
the input terminals of the SSR, use the following cables according to
the type of inductive noise, and reduce the noise level to less than
the must release voltage of the SSR.
The ON/OFF frequency should be set to 10 Hz maximum for AC load
switching and 100 Hz maximum for DC load switching. If switching
occurs at frequencies exceeding these values, the SSR output will
not be able to follow-up.
Input Impedance
Twisted-pair wire: For electromagnetic noise
Shielded cable: For static noise
A filter consisting of a combination of capacitor and resistor will effectively reduce noise generated from high-frequency equipment.
In SSRs which have wide input voltages (such as G3F and G3H), the
input impedance varies according to the input voltage and changes
in the input current. For semiconductor-driven SSRs, changes in voltage can cause malfunction of the semiconductor, so be sure to check
the actual device before usage. See the following examples.
Load
Input current (mA)
Input impedance (kΩ)
Applicable Input Impedance for a Photocoupler- type SSR without
Indicators (Example) G3F, G3H (Without Indicators)
Filter
High-frequency
device
Input Current
Input Impedance
Input voltage (V)
Note: R: 20 to 100 Ω
C: 0.01 to 1 µF
Applicable Input Impedance for a Photocoupler- type SSR with Indicators
(Example) G3B, G3F, G3H (With Indicators)
Input Voltage Ripples
When there is a ripple in the input voltage, set the input voltage so
that the peak voltage is lower than the maximum operating voltage
and the root voltage is above the minimum operating voltage.
Peak voltage
Input current (mA)
Input impedance (kΩ)
Input Conditions
Input Current
Input Impedance
Root voltage
Input voltage (V)
0V
When the SSR is powered by transistor output, the must release voltage may be insufficient due to leakage current while power is OFF.
To counteract this, connect bleeder resistance as shown in the diagram below and set the bleeder resistance so that VR is 0.5 V or
less.
Applicable Input Impedance (Example) G3CN
Input current (mA)
Input impedance (kΩ)
Countermeasures for Leakage Current
Input Current
Input Impedance
Bleeder resistance
Input voltage (V)
830
Solid State Relays Technical
Information
■ Output Circuit
AC ON/OFF SSR Output Noise Surges
If there is a large voltage surge in the AC current being used by the
SSR, the C/R snubber circuit built into the SSR between the SSR
load terminals will not be sufficient to suppress the surge, and the
SSR transient peak element voltage will be exceeded, causing overvoltage damage to the SSR.
Only the following models have a built-in surge absorbing varistor:
G3NA, G3S, G3PA, G3NE, G3NH, G3DZ (some models), G3RZ, and
G3FM. When switching an inductive load with any other models, be
sure to take countermeasures against surge, such as adding a surge
absorbing element.
In the following example, a surge voltage absorbing element has
been added.
1. Selecting a Diode
Withstand voltage = VRM ≥ Power supply voltage × 2
Forward current = IF ≥ load current
Varistor
Load
2. Selecting a Zener Diode
Zener voltage =
Vz < SSR withstand voltage – (Power supply voltage + 2 V)
Zener surge power =
PRSM > Vz × Load current × Safety factor (2 to 3)
Varistor
Select an element which meets the conditions in the following table
as the surge absorbing element.
10 to 120 VAC
240 to 270 V
200 to 240 VAC
440 to 470 V
380 to 480 VAC
820 to 1,000 V
Surge resistance
1,000 A min.
■ Application Circuit Examples
Connection to Sensors
The SSR connects directly to a Proximity Sensor or Photoelectric
Sensor.
When an L load, such as a solenoid or electromagnetic valve, is connected, connect a diode that prevents counter-electromotive force. If
the counter-electromotive force exceeds the withstand voltage of the
SSR output element, it could result in damage to the SSR output element. To prevent this, insert the element parallel to the load, as
shown in the following diagram and table.
As an absorption element, the diode is the most effective at suppressing the counter-electromotive force. The release time for the
solenoid or electromagnetic valve will, however, increase. Be sure to
check the circuit before use. To shorten the time, connect a Zener
diode and a regular diode in series. The release time will be shortened at the same rate that the Zener voltage (Vz) of the Zener diode
is increased.
Absorption Element Example
Effectiveness
Diode
O
(Brown)
Sensor
(Black)
(Blue)
Sensors: TL-X Proximity Sensor
E3S Photoelectric Sensor
Switching Control of Incandescent
Lamps
Load
Absorption
element
Load power supply
DC ON/OFF SSR Output Noise Surges
Diode +
Varistor
Zener diode
CR
O
X
Incandescent lamp
Input
signal
source
Load power supply
Varistor voltage
Note: When the Zener voltage is increased (Vz), the Zener diode capacity (PRSM) is also increased.
Temperature Control of Electric
Furnaces
Input signal
source and
Temperature
Controller
Solid State Relays
Load
heater
INPUT
Technical Information
Load power supply
Voltage
(Reference)
831
Forward and Reverse Operation of
Single-phase Inductive Motors
L
Motor
Load power supply
C
Note: 1. The voltage between the load terminals of either SSR 1 or
SSR 2 when turned OFF is approximately twice as high as
the supply voltage due to LC coupling. Be sure to use an
SSR model with a rated output voltage of at least twice the
supply voltage. For example, if the motor operates at a supply voltage of 100 VAC, the SSR must have an output voltage of 200 VAC or higher.
2. Make sure that there is a time lag of 30 ms or more to switch
over SW1 and SW2.
ON/OFF Control of Three-phase
Inductive Motors
Selecting an SSR for Different Loads
The following provides examples of the inrush currents for different
loads.
Motor
AC Load and Inrush Current
R
Threephase
power
supply
Solenoid
T
Forward and Reverse Operation of
Three-phase Inductive Motors
Capacitor
Relay
Approx.
2 to 3
times
Resistive
load
Approx. 1
20 to 50
times
Waveform
The SSR may be damaged due to phase short-circuiting if the SSR
malfunctions with noise in the input circuit of a SSR. To protect the
SSR from phase short-circuiting damage, a protective resistance R
may be inserted into the circuit.
The value of the protective resistance R must be determined according to the withstanding inrush current of the SSR. For example, the
G3NA-220B withstands an inrush current of 220 A. The value of the
protective resistance R is obtained from the following.
R > 220 V x √2/200A = 1.4 Ω
Considering the circuit current and weld time, insert the protective
resistance into the side that reduces the current consumption.
Obtain the consumption power of the resistance from the following.
P = I2R x Safety factor
(I = Load current, R = Protective resistance, Safety factor = 3 to 5)
Solid State Relays Technical
Motor
Approx. Approx. Approx.
Inrush
current/ 10 times 10 to 15 5 to 10
Normal
times
times
current
Make sure that signals input into the individual SSRs are proper if the
SSRs are applied to the forward and reverse operation of a threephase motor. If SW1 and SW2 as shown in the following circuit diagram are switched over simultaneously, a phase short-circuit will
result on the load side, which may damage the output elements of
the SSRs. This is because the SSR has a triac as an output element
that is turned ON until the load current becomes zero regardless of
the absence of input signals into the SSR. Therefore, make sure that
there is a time lag of 30 ms or more to switch over SW1 and SW2.
832
Incandescent
lamp
Information
Normal current
S
Load
Inrush current
Input signal
source
Heater Load (Resistive Load)
Half-wave Rectifying Circuit
A resistive load has no inrush current. The SSR is generally used
together with a voltage-output temperature controller for heater ON/
OFF switching. When using an SSR with the zero cross function,
most generated noise is suppressed. This type of load does not,
however, include all-metal and ceramic heaters. Since the resistance
values at normal temperatures of all-metal and ceramic heaters are
low, an overcurrent will occur in the SSR, causing damage. For
switching of all-metal and ceramic heaters, select a Power Controller
(G3PX, consult your OMRON representative) with a long soft-start
time, or a constant-current switch.
AC electromagnetic counters and solenoids have built-in diodes,
which act as half-wave rectifiers. For these types of loads, a halfwave AC voltage does not reach the SSR output. For SSRs with the
zero cross function, this can cause them not to turn ON. Two methods for counteracting this problem are described below.
• Connect a bleeder resistance with approximately 20% of the
SSR load current.
Bleeder resistance
Heater load
Temperature
Controller
(voltage output)
Load
Lamp Load
Inrush current (A. Peak)
A large inrush current flows through incandescent lamps, halogen
lamps, and similar devices (approx. 10 to 15 times higher than the
rated current). Select an SSR so that the peak value of inrush current
does not exceed half the inrush current resistance of the SSR. Refer
to “Repetitive” (indicated by the dashed line) shown in the following
figure. When a repetitive inrush current of greater than half the inrush
current resistance is applied, the output element of the SSR may be
damaged.
• Use SSRs without the zero cross function.
Full-wave Rectified Loads
AC electromagnetic counters and solenoids have built-in diodes,
which act as full-wave rectifiers. The load current for these types of
loads has a rectangular wave pattern, as shown in the following diagram.
Non-repetitive
Load
Repetitive
Circuit current
wave pattern
Energized time (ms)
Motor Load
When a motor is started, an inrush current of 5 to 10 times the rated
current flows and the inrush current flows for a longer time than for a
lamp or transformer. In addition to measuring the startup time of the
motor or the inrush current during use, ensure that the peak value of
the inrush current is less than half the inrush current resistance when
selecting an SSR. The SSR may be damaged by counter-electromotive force from the motor. Be sure to install overcurrent protection for
when the SSR is turned OFF.
Accordingly, AC SSRs use a triac (which turns OFF the element only
when the circuit current is 0 A) in the output element. If the load current waveform is rectangular, it will result in an SSR reset error.
When switching ON and OFF a load whose waves are all rectified,
use a -V model or Power MOS FET Relay.
-V-model SSRs:
G3F-203SL-V, G3H-203SL-V
Power MOS FET Relay: G3DZ, G3RZ, G3FM
Transformer Load
When the SSR is switched ON, an energizing current of 10 to 20
times the rated current flows through the SSR for 10 to 500 ms. If
there is no load in the secondary circuit, the energizing current will
reach the maximum value. Select an SSR so that the energizing current does not exceed half the inrush current resistance of the SSR.
Solid State Relays
Technical Information
833
■ Load Power Supply
Small-capacity Loads
Even when there is no input signal to the SSR, there is a small leakage current (IL) from the SSR output (LOAD). If this leakage current
is larger than the load release current, the SSR may fail to reset.
Connect a bleeder resistance R in parallel to increase the SSR
switching current.
Load (e.g., relays) release voltage
Load (e.g., relays) release current
R<
E
IL-I
Rectified Currents
If a DC load power supply is used for full-wave or half-wave rectified
AC currents, make sure that the peak load current does not exceed
the maximum usage load power supply of the SSR. Otherwise, overvoltage will cause damage to the output element of the SSR.
Peak voltage
E: Load (e.g., relays) reset voltage
I: Load (e.g., relays) reset current
SSR operating
voltage maximum
value
Load
Bleeder resistance standards:
100-VAC power supply, 5 to 10 kΩ, 3 W
200-VAC power supply, 5 to 10 kΩ, 15 W
Load power supply
Bleeder resistance R
Operating Frequency for AC Load
Power Supply
The operating frequency range for an AC load power supply is 47 to
63 Hz.
Low AC Voltage Loads
Inverter Load
Do not use an inverter-controlled power supply as the load power
supply for the SSR. Inverter-controlled waveforms become rectangular, so the dV/dt ratio is extremely large and the SSR may fail to
reset. An inverter-controlled power supply may be used on the input
side provided the effective voltage is within the normal operating voltage range of the SSR.
If the load power supply is used under a voltage below the minimum
operating load voltage of the SSR, the loss time of the voltage
applied to the load will become longer than that of the SSR operating
voltage range. See the following load example. (The loss time is
A < B.)
Before operating the SSR, make sure that this loss time will not
cause problems.
If the load voltage falls below the trigger voltage, the SSR will not turn
ON, so be sure to set the load voltage to 24 VAC minimum. (Except
for the G3PA-VD and G3NA-2@@B.)
100 VAC (R load) trigger voltage
Trigger voltage
Capacitive Load
The supply voltage plus the charge voltage of the capacitor is applied
to both ends of the SSR when it is OFF. Therefore, use an SSR
model with an input voltage rating twice the size of the supply voltage.
Leakage Current
A leakage current flows through a snubber circuit in the SSR even
when there is no power input. Therefore, always turn OFF the power
to the input or load and check that it is safe before replacing or wiring
the SSR.
Switch element
Input circuit
Limit the charge current of the capacitor to less than half the peak
inrush current value allowed for the SSR.
■ Operation
834
Solid State Relays Technical
Information
Snubber circuit
Varistor
∆V/∆T = dV/dt: voltage increase ratio
Trigger circuit
The dV/dt ratio tends to infinity,
so the SSR will not turn OFF.
Trigger voltage
trigger voltage
trigger voltage
Voltage increase ratio
24 VAC (R load) trigger voltage
Leakage
current
Therefore, to provide a safety feature for a control circuit using an
SSR, design a circuit in which a contactor or circuit breaker on the
load power supply side will turn OFF the load when the SSR causes
an error. Do not design a circuit that turns OFF the load power supply
only with the SSR. For example, if the SSR causes a half-wave error
in a circuit in which an AC motor is connected as a load, DC energizing may cause overcurrent to flow through the motor, thus burning
the motor. To prevent this from occurring, design a circuit in which a
circuit breaker stops overcurrent to the motor.
Location
Cause
Result
Input area
Overvoltage
Input element damage
Output area
Overvoltage
Output element damage
Overcurrent
Whole Unit
Ambient temperature Output element damage
exceeding maximum
Poor heat radiation
SSR Mounting Panel Quality
If G3NA or G3NE SSRs are to be mounted directly onto the control
panel, without the use of a heat sink, be sure to use a panel material
with low thermal resistance, such as aluminum or steel. Do not
mount the SSR on a panel with high thermal resistance, such as a
panel coated with paint. Doing so will decrease the radiation efficiency of the SSR, causing heat damage to the SSR output element.
Do not mount the SSR on a panel made of wood or any other flammable material. Otherwise the heat generated by the SSR will cause
the wood to carbonize, and may cause a fire.
Overcurrent Protection
A short-circuit current or an overcurrent flowing through the load of
the SSR will damage the output element of the SSR. Connect a
quick-break fuse in series with the load as a short-circuit protection
measure.
Design a circuit so that the protection coordination conditions for the
quick-break fuse satisfy the relationship between the SSR surge
resistance (IS), quick-break fuse current-limiting feature (IF), and the
load inrush current (IL), shown in the following chart.
Output terminal
The SSR is an optimum relay for high-frequency switching and highspeed switching, but misuse or mishandling of the SSR may damage
the elements and cause other problems. The SSR consists of semiconductor elements, and will break down if these elements are damaged by surge voltage or overcurrent. Most faults associated with the
elements are short-circuit malfunctions, whereby the load cannot be
turned OFF.
Output circuit
The operation indicator turns ON when current flows through the
input circuit. It does not indicate that the output element is ON.
Input indicator
Error Mode
Input circuit
Operation Indicator
Input terminal
■ Safety Considerations
■ SSR Life Expectancy
The SSR is not subject to mechanical wear. Therefore, the endurance of the SSR depends on the rate of internal component malfunction. For example, the rate for the G3M-202P is 321 Fit
(1 Fit = 10−9 = λ (malfunctions/operation)). The MTTF calculated from
this value is as follows:
MTTF = 321/λ60 = 3.12 × 106 (operations)
The effects of heat on the solder also need to be considered in estimating the total life expectancy of the SSR. The solder deteriorates
due to heat-stress from a number of causes. OMRON estimates that
the SSR begins to malfunction due to solder deterioration approximately 10 years after it is first installed.
■ Operation and Storage
Environment Precautions
Operation and Storage Locations
Do not operate or store the Relay in locations subject to direct sunlight or ultraviolet rays. Otherwise the resin will deteriorate, thereby
causing cracks and other damage to the case. Do not operate or
store the Relay in locations subject to exposure to water or chemicals. Otherwise rust, corrosion, and deterioration of the resin will
occur.
Extended Storage of SSR
If the SSR is stored for an extended period of time, the terminals will
be exposed to the air, reducing its solderability due to such effects as
oxidation. Therefore, when installing a Relay onto a board after a
long time in storage, check the state of the solder before use. Also,
take preventive measures so that the terminals will not be exposed to
water, oil, or solvents while they are stored.
Peak current (A)
Vibration and Shock
Do not subject the SSR to excessive vibration or shock. Otherwise
the SSR will malfunction and may cause damage to the internal components.
To prevent the SSR from abnormal vibration, do not install the SSR in
locations or by means that will subject it to vibration from other
devices, such as motors.
Solvents
Do not allow the SSR to come in contact with solvents such as thinners or gasoline. Doing so will dissolve the markings on the SSR.
Oil
Time (unit: s)
Do not allow the SSR terminal cover to come in contact with oil.
Doing so will cause the cover to crack and become cloudy.
Solid State Relays
Technical Information
835
PCB SSR Soldering
Handling the SSRs
SSRs must be soldered at 260°C within five seconds. For models,
however, that conform to separate conditions, perform soldering
according to the specified requirements.
Do Not Drop
Use a rosin-based non-corrosive flux that is compatible with the
material of the SSR.
The SSR is a high-precision component. Do not drop the SSR or
subject it to excessive vibration or shock regardless of whether the
SSR is mounted or not.
Ultrasonic Cleaning
The maximum vibration and shock that an SSR can withstand varies
with the model. Refer to the relevant datasheet.
Do not perform ultrasonic cleaning. Performing ultrasonic cleaning
after the SSR base has been installed will cause ultrasonic waves to
resonate throughout the SSR internal structure, thereby damaging
the internal components.
The SSR cannot maintain its full performance capability if the SSR is
dropped or subjected to excessive vibration or shock resulting in possible damage to its internal components.
The impact of shock applied to the SSR that is dropped varies, and
depends on the floor material, the angle of collision with the floor,
and the dropping height. For example, if a single SSR is dropped on
a plastic tile from a height of 10 cm, the SSR may receive a shock of
1,000 m/s2 or more.
Handle SSRs in in-line packages with the same care and keep them
free from excessive vibration or shock.
PCB-mounting SSRs
Suitable PCBs
PCB Material
PCBs are classified into epoxy PCBs and phenol PCBs. The following table lists the characteristics of these PCBs. Select one, taking into account
the application and cost. Epoxy PCBs are recommended for SSR mounting in order to prevent the solder from cracking.
Item
Electrical
characteristics
Mechanical
characteristics
Economical
efficiency
Application
Epoxy
Glass epoxy
Paper epoxy
High insulation resistance.
Inferior to glass epoxy but superior to
paper phenol PCBs.
Highly resistive to moisture absorption.
The dimensions are not easily af- Inferior to glass epoxy but superior to
fected by temperature or humidity. paper phenol PCBs.
Ideal for through-hole or multi-layer PCBs.
Expensive
Rather expensive
Phenol
Paper phenol
New PCBs are highly insulation-resistive but easily
affected by moisture absorption and cannot maintain
good insulation performance over a long time.
The dimensions are easily affected by temperature or
humidity.
Not suitable for through-hole PCBs.
Inexpensive
Applications that require high reli- Applications that may require less
Applications in comparatively good environments
ability.
reliability than those for glass epoxy with low-density wiring.
PCBs but require more reliability
than those of paper phenol PCBs.
PCB Thickness
Mounting Space
The PCB may warp due to the size, mounting method, or ambient
operating temperature of the PCB or the weight of components
mounted to the PCB. Should warping occur, the internal mechanism
of the SSR on the PCB will be deformed and the SSR may not provide its full capability. Determine the thickness of the PCB by taking
the material of the PCB into consideration.
The ambient temperature around the sections where the SSR is
mounted must be within the permissible ambient operating temperature. If two or more SSRs are mounted closely together, the SSRs
may radiate excessive heat. Therefore, make sure that the SSRs are
separated from one another at the specified distance provided in the
datasheet. If there is no such specification, maintain a space that is
as wide as a single SSR.
Terminal Hole and Land Diameters
Refer to the following table to select the terminal hole and land diameters based on the SSR mounting dimensions. The land diameter
may be smaller if the land is processed with through-hole plating.
Hole dia. (mm)
Nominal value
Tolerance
0.6
±0.1
0.8
1.0
1.2
1.3
1.5
1.6
2.0
836
Provide adequate ventilation to the SSRs as shown in the following
diagram.
Minimum land dia.
(mm)
1.5
1.8
2.0
2.5
2.5
3.0
3.0
3.0
Solid State Relays Technical
Information
Mounting SSR to PCB
Read the precautions for each model and fully familiarize yourself
with the following information when mounting the SSR to the PCB.
1. Do not bend the terminals to make the
Step 1
SSR self-standing, otherwise the full
SSR mounting
performance of the SSR may not be
possible.
2. Process the PCB properly according to
the mounting dimensions.
Step 2
Flux coating
Flux
Step 3
Preheating
1. The flux must be a non-corrosive rosin
flux, which is suitable to the material of
the SSR.
Apply alcohol solvent to dissolve the flux.
2. Make sure that all parts of the SSR other
than the terminals are free of the flux. The
insulation resistance of the SSR may be
degraded if there is flux on the bottom of
the SSR.
Step 5
Cooling
1. After soldering the SSR, be sure to cool down
the SSR so that the soldering heat will not
deteriorate the SSR or any other components.
2. Do not dip the SSR into cold liquid, such as a
detergent, immediately after soldering the
SSR.
Step 6
Cleaning
1. Refer to the following table for the selection of
the cleaning method and detergent.
Detergent
Boiling or dip cleaning is possible for the
SSR. Do not perform ultrasonic cleaning or
cut the terminals, otherwise the internal
parts of the SSR may be damaged. Make
sure that the temperature of the detergent is
within the permissible ambient operating
temperature of the SSR.
1. Be sure to preheat the SSR to allow better
soldering.
2. Preheat the SSR under the following
conditions.
Temperature
100°C max.
Time
1 min max.
2. Applicability of Detergents
Detergent
3. Do not use the SSR if it is left at high
temperature over a long time. This may
change the characteristics of the SSR.
Step 4
Soldering
Automatic Soldering
1. Flow soldering is recommended for
maintaining a uniform soldering quality.
Solder: JIS Z3282 or H63A
Soldering temperature: Approx. 260°C
Soldering time: Approx. 5 s
(Approx. 2 s for first time and approx. 3 s for
second time for DWS)
Perform solder level adjustments so that
the solder will not overflow on the PCB.
Manual Soldering
1. After smoothing the tip of the soldering
iron, solder the SSR under the following
conditions.
Solder: JIS Z3282, 1160A, or H63A
with rosin-flux-cored solder
Soldering iron: 30 to 60 W
Soldering temperature:
280°C to 300°C
Solder
Soldering time: Approx. 3 s
Flux
2. As shown in the above illustration,
solder with a groove for preventing flux
dispersion.
Applicability
Chlorine Perochine
detergent Chlorosolder
Trichloroethylene
Indusco
Aqueous Holys
detergent Pure water
(pure hot water)
OK
OK
Alcohol
IPA
Ethanol
OK
Others
Paint thinner
Gasoline
NG
Note: 1. Contact your OMRON representatives
before using any other detergent. Do
not apply Freon TMC, paint thinner, or
gasoline to any SSR.
2. The space between the SSR and PCB
may be not be adequately cleaned with
a hydrocarbon or alcohol detergent.
Actions are being taken worldwide to stop
the use of CFC-113 (chlorofluorocarbon)
and 1.1.1 trichloroethane. Your understanding and cooperation are highly appreciated.
Step 7
Coating
Solid State Relays
1. Do not fix the whole SSR with resin, otherwise
the characteristics of the SSR may change.
2. The temperature of the coating material must
be within the permissible ambient operating
temperature range.
Coating
Type
Applicability
Epoxy
OK
Urethane
OK
Silicone
OK
Technical Information
837
Terms and Conditions of Sale
1. Offer; Acceptance. These terms and conditions (these "Terms") are deemed
part of all quotations, acknowledgments, invoices, purchase orders and other
documents, whether electronic or in writing, relating to the sale of products or
services (collectively, the "Products") by Omron Electronic Components LLC
("Seller"). Seller hereby objects to any terms or conditions proposed in
Buyer's purchase order or other documents which are inconsistent with, or in
addition to, these Terms.
2. Prices; Payment. All prices stated are current, subject to change without
notice by Seller. Buyer agrees to pay the price in effect at time of shipment.
Payments for Products received are due net 30 days unless otherwise stated
in the invoice.
3. Discounts. Cash discounts, if any, will apply only on the net amount of
invoices sent to Buyer after deducting transportation charges, taxes and
duties, and will be allowed only if (i) the invoice is paid according to Seller's
payment terms and (ii) Buyer has no past due amounts owing to Seller.
4. Currencies. If the prices quoted herein are in a currency other than U.S. dollars, Buyer shall make remittance to Seller at the then current exchange rate
most favorable to Seller and which is available on the due date; provided that if
remittance is not made when due, Buyer will convert the amount to U.S. dollars at the then current exchange rate most favorable to Seller available during
the period between the due date and the date remittance is actually made.
5. Governmental Approvals. Buyer shall be responsible for, and shall bear all
costs involved in, obtaining any government approvals required for the importation or sale of the Products.
6. Taxes. All taxes, duties and other governmental charges (other than general
real property and income taxes), including any interest or penalties thereon,
imposed directly or indirectly on Seller or required to be collected directly or
indirectly by Seller for the manufacture, production, sale, delivery, importation,
consumption or use of the Products sold hereunder (including customs duties
and sales, excise, use, turnover and license taxes) shall be charged to and
remitted by Buyer to Seller.
7. Financial. If the financial position of Buyer at any time becomes unsatisfactory
to Seller, Seller reserves the right to stop shipments or require satisfactory
security or payment in advance. If Buyer fails to make payment or otherwise
comply with these Terms or any related agreement, Seller may (without liability
and in addition to other remedies) cancel any unshipped portion of Products
sold hereunder and stop any Products in transit until Buyer pays all amounts,
including amounts payable hereunder, whether or not then due, which are
owing to it by Buyer. Buyer shall in any event remain liable for all unpaid
accounts.
8. Cancellation; Etc. Orders are not subject to rescheduling or cancellation
unless Buyer indemnifies Seller fully against all costs or expenses arising in
connection therewith.
9. Force Majeure. Seller shall not be liable for any delay or failure in delivery
resulting from causes beyond its control, including earthquakes, fires, floods,
strikes or other labor disputes, shortage of labor or materials, accidents to
machinery, acts of sabotage, riots, delay in or lack of transportation or the
requirements of any government authority.
10. Shipping; Delivery. Unless otherwise expressly agreed in writing by Seller:
1. Shipments shall be by a carrier selected by Seller;
2. Such carrier shall act as the agent of Buyer and delivery to such carrier
shall constitute delivery to Buyer;
3. All sales and shipments of Products shall be FOB shipping point (unless
otherwise stated in writing by Seller), at which point title to and all risk of
loss of the Products shall pass from Seller to Buyer, provided that Seller
shall retain a security interest in the Products until the full purchase price is
paid by Buyer;
4. Delivery and shipping dates are estimates only.
5. Seller will package Products as it deems proper for protection against
normal handling and extra charges apply to special conditions.
11. Claims. Any claim by Buyer against Seller for shortage or damage to the
Products occurring before delivery to the carrier must be presented in writing
to Seller within 30 days of receipt of shipment and include the original transportation bill signed by the carrier noting that the carrier received the Products
from Seller in the condition claimed.
12. Warranties. (a) Exclusive Warranty. Seller's exclusive warranty is that the
Products will be free from defects in materials and workmanship for a period of
twelve months from the date of sale by Seller (or such other period expressed
in writing by Seller). Seller disclaims all other warranties, express or implied.
(b) Limitations. SELLER MAKES NO WARRANTY OR REPRESENTATION,
EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS.
BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. Seller further disclaims all warranties and responsibility of
any type for claims or expenses based on infringement by the Products or otherwise of any intellectual property right. (c) Buyer Remedy. Seller's sole obligation hereunder shall be to replace (in the form originally shipped with Buyer
responsible for labor charges for removal or replacement thereof) the noncomplying Product or, at Seller's election, to repay or credit Buyer an amount
equal to the purchase price of the Product; provided that in no event shall
Seller be responsible for warranty, repair, indemnity or any other claims or
expenses regarding the Products unless Seller's analysis confirms that the
Products were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return of
any Products by Buyer must be approved in writing by Seller before shipment.
Seller shall not be liable for the suitability or unsuitability or the results from the
use of Products in combination with any electrical or electronic components,
circuits, system assemblies, or any other materials or substances or environments. Any advice, recommendations or information given orally or in writing
are not to be construed as an amendment or addition to the above warranty.
13. Limitation on Liability; Etc. SELLER SHALL NOT BE LIABLE FOR SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF
PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN
CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. Further, in
no event shall liability of Seller exceed the individual price of the Product on
which liability is asserted.
14. Indemnities. Buyer shall indemnify and hold harmless Seller, its affiliates and
its employees from and against all liabilities, losses, claims, costs and
expenses (including attorney's fees and expenses) related to any claim, investigation, litigation or proceeding (whether or not Seller is a party) which arises
or is alleged to arise from Buyer's acts or omissions under these Terms or in
any way with respect to the Products. Without limiting the foregoing, Buyer (at
its own expense) shall indemnify and hold harmless Seller and defend or settle
any action brought against Seller to the extent that it is based on a claim that
any Product made to Buyer specifications infringed intellectual property rights
of another party.
15. Property; Confidentiality. The intellectual property embodied in the Products is
the exclusive property of Seller and its affiliates and Buyer shall not attempt to
duplicate it in any way without the written permission of Seller. Notwithstanding any charges to Buyer for engineering or tooling, all engineering and tooling
shall remain the exclusive property of Seller. All information and materials supplied by Seller to Buyer relating to the Products are confidential and proprietary, and Buyer shall limit distribution thereof to its trusted employees and
strictly prevent disclosure to any third party.
16. Miscellaneous. (a) Waiver. No failure or delay by Seller in exercising any right
and no course of dealing between Buyer and Seller shall operate as a waiver
of rights by Seller. (b) Assignment. Buyer may not assign its rights hereunder
without Seller's written consent. (c) Law. These Terms are governed by Illinois law (without regard to conflict of law principles). Federal and state courts
in Illinois shall have exclusive jurisdiction for any dispute hereunder.
(d) Amendment. These Terms constitute the entire agreement between Buyer
and Seller relating to the Products, and no provision may be changed or
waived unless in writing signed by the parties. (e) Severability. If any provision
hereof is rendered ineffective or invalid, such provision shall not invalidate any
other provision. (f) Setoff. Buyer shall have no right to set off any amounts
against the amount owing in respect of this invoice.. (g) Definitions. As used
herein, "including" means "including without limitation".
Certain Precautions on Specifications and Use
1. Suitability for Use. Seller shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in
Buyer's application or use of the Product. At Buyer's request, Seller will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not
sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use.
Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer's application, product or system. Buyer
shall take application responsibility in all cases but the following is a nonexhaustive list of applications for which particular attention must be given:
(i) Outdoor use, uses involving potential chemical contamination or electrical
interference, or conditions or uses not described in this document.
(ii) Energy control systems, combustion systems, railroad systems, aviation
systems, medical equipment, amusement machines, vehicles, safety
equipment, and installations subject to
separate industry or government regulations.
(iii)Use in consumer products or any use in significant quantities.
(iv)Systems, machines and equipment that could present a risk to life or
property. Please know and observe all prohibitions of use applicable to this
product.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS
RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM
AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT
THE OMRON PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE
INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
2. Programmable Products. Seller shall not be responsible for the user's
programming of a programmable product, or any consequence thereof.
3. Performance Data. Performance data given in this publication is provided as a
guide for the user in determining suitability and does not constitute a warranty.
It may represent the result of Seller's test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to
Seller's Warranty and Limitations of Liability.
4. Change in Specifications. Product specifications and accessories may be
changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed,
or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your
application. Please consult with your Seller representative at any time to confirm actual specifications of purchased Product.
5. Errors and Omissions. The information in this publication has been carefully
checked and is believed to be accurate; however, no responsibility is assumed
for clerical, typographical or proofreading errors, or omissions.
6. RoHS Compliance. Where indicated, our products currently comply, to the best
of our knowledge as of the date of this publication, with the requirements of the
European Union's Directive on the Restriction of certain Hazardous Substances ("RoHS"), although the requirements of RoHS do not take effect until
July 2006. These requirements may be subject to change. Please consult our
website for current information.
Complete “Terms and Conditions of Sale” for product purchase and use are on Omron’s website
at www.components.omron.com – under the “About Us” tab, in the Legal Matters section.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
OMRON ELECTRONIC
COMPONENTS LLC
55 E. Commerce Drive, Suite B
Schaumburg, IL 60173
847-882-2288
Cat. No. JB301-E3-01
3/05
OMRON CANADA, INC.
OMRON ON-LINE
885 Milner Avenue
Toronto, Ontario M1B 5V8
Global - http://www.omron.com
USA - http://www.components.omron.com
Canada - http://www.omron.ca
416-286-6465
Specifications subject to change without notice
Printed in USA