722

TELEDYNE RELAYS
SERIES
722
COMMERCIAL/INDUSTRIAL
TO-5 RELAY
DPDT MAGNETIC LATCHING
SERIES
DESIGNATION
RELAY TYPE
722
DPDT relay
722D
DPDT relay with internal diode for coil transient suppression
DESCRIPTION
The TO-5 relay, originally conceived and developed by Teledyne, has
become one of the industry standards for low level switching from dry
circuit to 1 ampere. Designed expressly for high density PC Board
mounting, its small size and low coil power dissipation make the TO-5
relay one of the most versatile ultraminiature relays available.
Unique construction features and manufacturing techniques provide
excellent resistance to environmental extremes and overall high reliability.
• All welded construction.
• Unique uni-frame design providing high magnetic efficiency and
mechanical rigidity.
• High force/mass ratios for resistance to shock and vibration.
• Advanced cleaning techniques provide maximum assurance of
internal cleanliness.
• Precious metal alloy contact material with gold plating assures
excellent high current and dry circuit switching capabilities.
The 722D Series utilizes discrete silicon diodes for coil suppression.
The 722 Series magnetic latching relays are ideally suited for applications
where power dissipation must be minimized. The relays can be operated
with a short duration pulse and after contacts have transferred, no external
holding power is required.
The magnetic latching feature of the 722 Series provides a "memory"
capability, since the relays will not reset upon removal of power.
By virtue of its inherently low intercontact capacitance and contact circuit
losses, the TO-5 relay has shown itself to be an excellent ultraminiature
RF switch for frequency ranges well into the UHF spectrum. A typical
RF application for the TO-5 relay is in hand held radio transceivers,
wherein the combined features of good RF performance, small size,
low coil power dissipation and high reliability make it a preferred
method of Transmitter-Receive switching (see Figure 1).
PRINCIPLE OF OPERATION
PERMANENT MAGNET
MAGNETIC CIRCUIT A
Energizing Coil B produces a magnetic field opposing the
SOFT IRON FRAME
holding flux of the permanent magnet in Circuit B. As this MAGNETIC CIRCUIT B
net holding force decreases, the attractive force in the air
gap of Circuit A, which also results from the flux of the
COIL A
COIL B
permanent magnet, becomes great enough to break the
armature free of Core B, and snap it into a closed position SOFT IRON
SOFT IRON
CORE A
CORE B
against Core A. The armature then remains in this position
AIR GAP
upon removal of power from Coil B, but will snap back SOFT IRON
STATIONARY
into position B upon energizing Coil A. Since operation ARMATURE
CONTACT
depends upon cancellation of a magnetic field, it is
necessary to apply the correct polarity to the relay coils
as indicated on the relay schematic.
MOVING
CONTACT
When latching relays are installed in equipment, the
latch and reset coils should not be pulsed simultaneously.
Coils should not be pulsed with less than the nominal coil voltage and the pulse width should be
a minimum of three times the specified operate time of the relay. If these conditions are not
followed, it is possible for the relay to be in the magnetically neutral position.
101
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Temperature
(Ambient)
-55°C to + 85°C
Vibration
10 g’s to 1000 Hz (Note 3)
Shock
30 g’s for 6 msec. (Note 3)
half-sine
Enclosure
Hermetically sealed
Weight
0.1 oz (2.9 gms.) max.
SERIES 722
GENERAL ELECTRICAL SPECIFICATIONS
(@ 25°C)) (Notes 1 & 2)
Contact Arrangement
Rated Duty
Contact Resistance
Contact Load Rating (DC)
(See Fig. 2 for other DC
resistive voltage/current ratings)
2 Form C (DPDT)
Continuous
0.15 ohm max. before life; 0.25 ohm max. after life at 1A/28VDC, (measured 1/8” from header)
Resistive:
1 Amp/28VDC
Inductive:
200 mA/28VDC (320 mH)
Lamp:
100 mA/28VDC
Low Level: 10 to 50 µA/10 to 50 mV
Resistive:
250 mA/115VAC, 60 and 400Hz (Case not grounded)
100 mA/115VAC, 60 and 400Hz (Case grounded)
10,000,000 cycles (typical) at low level
01,000,000 cycles (typical) at 0.5A/28VDC resistive
00,100,000 cycles min. at all other loads specified above
2A/28VDC Resistive (100 cycles min.)
Contact factory
290 milliwatts typical at nominal rated voltage
2.0 msec. max. at nominal rated coil voltage
6.0 msec. at nominal voltage
0.4 pf typical
1,000 megohms min. between mutually isolated terminals
Atmospheric pressure: 350 VRMS/60 Hz
60 VDC, min.
2.0 Volt, max.
Contact Load Ratings (AC)
Contact Life Ratings
Contact Overload Rating
Contact Carry Rating
Coil Operating Power
Operate Time
Minimum Operate Pulse
lntercontact Capacitance
Insulation Resistance
Dielectric Strength
Diode P.I.V. 720D/722D
Negative Coil Transient 720D/722D
DETAILED ELECTRICAL SPECIFICATIONS
(@ 25°C) (Note 2)
➧
BASE PART
NUMBERS
Coil Voltage (VDC)
722-5
722D-5
Nom.
Max.
5.0
6.0
61
3.5
Coil Resistance (Ohms ± 20% @ 25°C)
Set & Reset Voltage (VDC, Max.) Pulse Operated
722-6
722D-6
722-9
722D-9
722-12
722D-12
722-18
722D-18
722-26
722D-26
6.0
8.0
120
4.5
9.0
12.0
280
6.8
12.0
16.0
500
9.0
18.0
24.0
1130
13.5
26.5
32.0
2000
18.0
PERFORMANCE CURVES (NOTE 1)
TYPICAL RF PERFORMANCE
0
TYPICAL DC CONTACT RATING (RESISTIVE)
INSE
LOS
.2
300
S
.3
10
1.92
20
WR)
SS (VS
N LO
1.22
RETUR
30
40
TION
ISOLA
50
1.07
CTS
ONTA
SS C
ACRO
1.02
1.01
LES
SS PO
N ACRO
O
ISOLATI
60
VSWR
dB
.4
LOAD VOLTAGE (VDC)
RTIO
N
.1
200
150
100
50
1.00
70
250
1.00
.01
0.5
.1
.5
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
FREQUENCY (GHz)
LOAD CURRENT (AMPS DC)
FIGURE 1
FIGURE 2
102
0.7
0.8
0.9
1.0
SERIES 722
OUTLINE DIMENSIONS
TERMINAL LOCATIONS AND PIN NUMBERING (REF. ONLY)
(Viewed from Terminals)
CASE DETAIL
.370
(9.40)
DIA. MAX.
.031 (.79)
± .003 (0.08)
.200 (5.08)
± .010 (.25) DIA.
.335
(8.51)
DIA. MAX.
10
9
.035 (.89)
± .010 (0.25)
.280 (7.11) MAX.
.200 (5.08)
± .010 (.25) DIA.
1
8
2
7
3
6
36° ±3° TYP.
5
4
WIRE LEAD: .75 (19.05) MIN.
+.002 (.05)
.017 (.43) –.001 (.03) DIA.
DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS)
SPACER PAD
SCHEMATIC DIAGRAMS
Relays can be supplied with a spacer pad attached to the relay header.
The pad permits the relay to be spaced away from the mounting surface
facilitating solder joint inspection. To order add M4 to the part number
(e.g. 722M4-26).
COIL B
COIL B
.305 MAX
(7.75)
COIL A
722
COIL A
722D
NOTES:
1. Material: Polyester film.
2. Increase contact resistance by 0.01 ohm.
SCHEMATICS ARE VIEWED FROM TERMINALS.
CONTACTS SHOWN IN POSITION RESULTING WHEN COIL A LAST ENERGIZED.
NOTES:
SPREADER PAD
Relays can be supplied with spreader pads which are attached to the
relays. Spreaders can be supplied by adding M to the part number (e.g.
722M-26).
.370 SQ. MAX.
(9.40)
1. Characteristics shown as "typical" are based on available data and
are best estimates. No on-going verification tests are performed.
2. Unless otherwise specified, parameters are initial values.
3. Relays will exhibit no contact chatter in excess of 10 µsec or transfer
in excess of 1 µsec.
.100 (2.54)
.100 (2.54)
.150 (3.81)
.300
(7.62)
.200
(5.08)
(
.41 .016
)
.18 .007
.398 MAX.
(10.11)
NOTES:
1. Material: Diallyl phthalate.
2. Increase contact resistance by 0.925 ohm.
©1996
TELEDYNE RELAYS
103
12525 Daphne Avenue
Hawthorne, California 90250