S
4 A CAPACITY,
THE VARIETY OF CONTACT
ARRANGEMENTS
S RELAYS
FEATURES
28.0
1.102
12.0
.472
10.4
.409
mm inch
• The variety of contact arrangements
2 Form A 2 Form B, 3 Form A 1 Form
B, 4 Form A
• Latching types available
• High sensitivity in small size 100 mW
pick-up and 200 mW nominal
operating power
• High shock and vibration resistance
Shock: 50 G Vibration: 10 to 55 Hz at
double amplitude of 3 mm .118 inch
• Wide switching range From 100µA
100 mV DC to 4 A 250 V AC
• Low thermal electromotive force
Approx. 3 µV
• Dual-In-Line packaging arrangement
SPECIFICATIONS
Characteristics (at 25°C 77°F 50% Relative humidity)
Contacts
2 Form A 2 Form B,
3 Form A 1 Form B,
4 Form A
Arrangement
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
50 mΩ
Initial contact pressure
Approx. 12 g .42 oz
Contact material
Gold clad silver alloy
Electrostatic capacitance
Approx. 3pF
Thermal electromotive force
(at nominal coil voltage)
Approx. 3µV
Rating
(resistive)
Latching
750 Vrms
Between contact sets
1,000 Vrms
Between contacts and
coil
1,500 Vrms
Max. 10 ms (Approx. 5 ms)
250 V AC, 30 V DC
(48 VDC at less than 0.5 A)
Set time* (latching)
(at nominal voltage)(at 20°C)
Max. 15 ms (Approx. 8 ms)
4 A (AC), 3 A (DC)
Reset time* (latching)
(at nominal voltage)(at 20°C)
Max. 15 ms (Approx. 8 ms)
1,000 VA, 90 W
1
100µA 100 m V DC
Mechanical (at 50 cps)
108
4 A 250 V AC
Electrical
(at 20 cpm) 3 A 30 V DC
105
2 × 10
5
Coil (polarized) (at 20°C 68°F)
Single side
stable
Initial
breakdown
voltage*2
Release time (without diode)*3
(at nominal voltage)(at 20°C)
4 A 250 V AC, 3 A 30 V DC
Max. switching current
Expected
life (min.
operations)
Between open contacts
Max. 15 ms (Approx. 8 ms)
Maximum switching power
Min. switching capacity**
10,000 MΩ at 500 V DC
Initial insulation resistance*1
Operate time*3
(at nominal voltage)(at 20°C)
Nominal switching capacity
Maximum switching voltage
20 cpm for maximum load,
50 cps for low-level load
(1 mA 1 V DC)
Max. operating speed
3
3
Initial contact bounce, max.
Temperature rise
(at nominal voltage)(at 20°C)
Shock resistance
Minimum operating power
Approx. 100 mW
Nominal operating power
Approx. 200 mW
Minimum set and reset
Approx. 100 mW
Nominal set and reset
Approx. 200 mW
Notes:
**1 This value can change due to the switching frequency, environmental
conditions, and desired reliability level, therefore it is recommended to check this
with the actual load.
Remarks
* Specifications will vary with foreign standards certification ratings.
*1 Measurement at same location as “Initial breakdown voltage” section
*2 Detection current: 10mA
*3 Excluding contact bounce time
*4 Half-wave pulse of sine wave: 11ms; detection time: 10µs
*5 Half-wave pulse of sine wave: 6ms
*6 Detection time: 10µs
*7 Refer to 6. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (see catalog).
1 ms
Max. 35°C with nominal coil
voltage and at maximum
switching current
Functional*4
Destructive*
Min. 490 m/s2 {50 G}
5
Functional*6
176.4 m/s2 {18 G}, 10 to 55 Hz
at double amplitude of 3 mm
Destructive
235.2 m/s2 {24 G}, 10 to 55 Hz
at double amplitude of 4 mm
Vibration resistance
Ambient
Conditions for operation,
temp.
transport and storage*7
(Not freezing and condensHumidity
ing at low temperature)
Unit weight
Min. 980 m/s2 {100 G}
–40°C to +65°C
–40°F to +149°F
5 to 85% R.H.
Approx. 8 g .28 oz
TYPICAL APPLICATIONS
Telecommunications equipment, data processing equipment,
facsimiles, alarm equipment, measuring equipment.
en_ds_61105_0000: 130804D
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S
ORDERING INFORMATION
Ex.
2
S
Product name
S
L2
Contact arrangement
2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A
48 V
Operating function
Nil: Single side stable
L: 1 coil latching
L2: 2 coil latching
Coil voltage, V DC
3, 5, 6,12, 24, 48
Notes: 1) Standard packing; Carton 50 pcs. Case 500 pcs.
2) UL/CSA approved type is standard.
TYPES AND COIL DATA at 20°C 68°F
Single side stable
Maximum
allowable
voltage,
V DC (40°C)
Nominal
operating
power,
mW
Nominal
voltage,
V DC
Pick-up
voltage,
V DC (max.)
Drop-out
voltage,
V DC (min.)
Nominal
operating
current,
mA
ST-3V
3
2.1
0.3
66.7
45
23
200
5.5
ST-5V
5
3.5
0.5
38.5
130
65
192
9.0
Type
Coil resistance,
Ω (±10%)
Inductance,
mH
ST-6V
6
4.2
0.6
33.3
180
93
200
11.0
ST-12V
12
8.4
1.2
16.7
720
370
200
22.0
ST-24V
24
16.8
2.4
8.4
2,850
1,427
202
44.0
ST-48V
48
33.6
4.8
5.6
8,500
3,410
271
75.0
1 coil latching
Coil resistance, Ω
(±10%)
Nominal
operating
power,
mW
Maximum
allowable
voltage,
V DC (40°C)
Nominal
voltage,
V DC
Pick-up
voltage,
V DC (max.)
Drop-out
voltage
V DC (min.)
Nominal operating current,
mA
ST-L1-3V
3
2.1
0.3
33
90
0.04
99
8.4
ST-L1-5V
5
3.5
0.5
16
300
0.14
80
15.3
Type
Inductance,
mH
ST-L1-6V
6
4.2
0.6
16
360
0.14
96
16.8
ST-L1-12V
12
8.4
1.2
8
1450
0.6
96
33.7
ST-L1-24V
24
16.8
2.4
4
5700
2.05
96
66.7
ST-L1-48V
48
33.6
4.8
3
16,000
8.9
144
111
2 coil latching
Coil resistance,
Ω (±10%)
Inductance,
mH
Maximum
allowable
voltage,
V DC (40°C)
5.5
Nominal
operating
power,
mW
Nominal voltage,
V DC
Set and reset
voltage,
V DC (max.)
Nominal operating
current,
mA
Coil I
Coil II
Coil I
ST-L2-3V
3
2.1
66.7
45
45
10
10
200
ST-L2-5V
5
3.5
38.5
130
130
31
31
192
9.0
ST-L2-6V
6
4.2
33.7
180
180
40
40
200
11.0
ST-L2-12V
12
8.4
16.7
720
720
170
170
200
22.0
ST-L2-24V
24
16.8
8.4
2,850
2,850
680
680
202
44.0
ST-L2-48V
48
33.6
7.4
6,500
6,500
1,250
1,250
355
65.0
Type
Coil II
Note: Insert 2, 3 or 4 in T for contact form required.
DIMENSIONS
mm inch
28±0.5
1.102±0.02
1
.039
10±0.5
.394±0.02
4
.157
0.5
.020
1
2
3
4
5
12
11
10
9
8
7.62
.300
12-1.3 DIA.
.047-.051 DIA.
6
7.62 12
.472
7 .300
2.54
.100
5.08
.200
General tolerance: ±0.3 ±.012
2
2.54
.100
0.5
.020
0.4
1.0 .016
.039
1.4
.055
3
.118
PC board pattern (Copper-side view)
12
.472
Tolerance: ±0.1 ±.003
en_ds_61105_0000: 130804D
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Schematic (Bottom view)
Single side stable
Deenergized position
2a2b
2 coil latching
Diagram shows the “reset”
position when terminals 6
and 7 are energized.
Energize terminals 1 and
12 to transfer contacts.
1
2
3
4
5
2
3
4
5
4a
6
1
2
3
4
5
6
12
11
10
9
8
7
1
2
3
4
5
6
+
+
+
-
-
11
10
9
8
7
1
2
3
4
5
6
+
Set
1
12
2a2b
3a1b
6
11
10
9
8
7
1
2
3
4
5
6
+
+
Set
Reset
12
3a1b
12
-
11
10
9
8
7
+
+
Reset
12
4a
-
11
10
9
8
Set
7
+
Reset
12
-
11
10
9
8
7
REFERENCE DATA
1. Maximum switching power
2. Life curve
3. Contact reliability
Condition: 1V DC, 1mA
Detection level 10 Ω
Tasted Sample: S4-24V, 10pcs
1,000
1,000
DC resistive load
99.9
99.0
95.0
AC resistive load
Life, ×104
Contact voltage, V
500
100
70.0
50.0
30.0
100
10.0
5.0
50
30
10
10
0.1
1
10
2.0
1.0
0.5
125 V AC
(cosϕ = 1.0)
250 V AC
(cosϕ = 1.0)
0
1
2
Contact current, A
3
4
m = 1.6
µ: 79 million time
σ: 51 million time
95% reliability limit:
14.6 million times
(weibul probability paper)
0.2
0.1
5
1.0
4.-(1) Coil temperature rise
4.-(2) Coil temperature rise
Tested Sample: S4-24V, 4 Form A
Tested Sample: S4-24V, 4 Form A
10.0
No. of operations, ×10
Contact current, A
7
5. Operate and release time
(Single side stable type)
20
90
90
18
80
4A
60
0A
50
40
80
70
60
50
40
30
30
20
20
10
10
Coil operating
power, 0.2 W
0
0
0.2
0.4
0.6
0.8
1.0
Coil operating power, W
1.2
1
2
3
4
5
6
(2)
+30
(3)
Single side stable
Drop-out voltage
0
Pick-up voltage
–30
5
Inter-relay distance, mm
en_ds_61105_0000: 130804D
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Release time (with diode)
10
Max.
8
Min.
Operate time
6
Max.
Min.
120
140
Coil applied voltage, %V
7. Thermal electromotive force
Note: When installing an S-relay near another, and there is no effect
from an external magnetic field, be sure to leave at least 10 mm
.394 inch between relays in order to achieve the performance
listed in the catalog.
Rate of change, %
Rate of change, %
(1)
14
Contact current, A
6. Influence of adjacent mounting
(1) & (3) relays
are energized
16
4 Max.
Min.
2
Release time
0
80
100
10
+30
2 coil latching
0
200
Thermal electromotive force, µV
70
Operate/release time, ms
100
Temperature rise, °C
Temperature rise, °C
Tested Sample: S4-24V, 10pcs
100
NR-H
100
NF relay S relay
Pick-up voltage
–30
5
Inter-relay distance, mm
10
2
4
6
8
Minute
10
12
3
S
Single side stable
φ
Pick-up voltage
0
Drop-out voltage
–30
Rate of change, %
Rate of change, %
+30
+30
50
G
2 coil latching
0
–30
Pick-up voltage
50
100
+30
Single side stable
φ
Drop-out voltage
0
Pick-up voltage
–30
100
Rate of change, %
Rate of change, %
8. Effect from an external magnetic field
+30
50
100
G
2 coil latching
0
Pick-up voltage
–30
50
G
100
G
ACCESSORIES
Specifications
Breakdown voltage
1,500 Vrms between terminals
Insulation resistance
More than 100 MΩ between terminals at 500 V DC Mega
150 ±3°C (302 ±5.4°F) for 1 hour.
Heat resistance
Maximum continuous current
S Relay Socket,
S-PS
4A
(Note: Don't insert or remove relays while in the energized condition.)
Dimensions
mm inch
PC board pattern (Copper-side view)
12.4±0.6
.488±.024
7.6
.299
18.3±0.6
.720±.024
1.2±0.3
.047±.012
4.85±0.3
.191±.012
1.5±0.3
.059±.012
5.08 5.08 5.08 5.08 5.08
12-1.6 DIA. HOLE .200 .200 .200 .200 .200
12-.063 DIA. HOLE
15.5±0.6
.610±.024
5.08±0.3
.200±.012
32.4±0.6
1.276±.024
1.5±0.3
.059±.012
0.4±0.1
.016±.004
3.4±0.3
.134±.012
7.62±0.3
.300±.012
Terminal width: 1.3 .051
Terminal thickness: 1.2 .047
Inserting and removing method
Inserting method: Insert the relay as
shown in Fig. 1 unit the rib of the relay
snaps into the clip of the socket.
Rib
Fig. 1
Removing method:
(1) Remove the relay straight from the
socket holding the shaded portion of the
relay as shown in Fig. 2.
Fig. 2
(2) When sockets are mounted in close
proximity, use a slotted screw driver as
shown in Fig. 3.
Fig. 3
4
en_ds_61105_0000: 130804D
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NOTES
1. Special use of 2 coil latching types: 2
ways can be considered if 2 coil latching
types are used as 1 coil latching types.
(A) Reverse polarity is applied to the set
coil of 2 coil latching type.
(B) By shorting terminals 12 and 7, apply
plus to 1, minus to 6 at set and plus to 6,
minus to 1 at reset. Applied coil voltage
should be the same as the nominal.
Operating power will be reduced to onehalf.
Reset position of 2a2b type
-
1
12
2
3
4
5
11
10
9
8
6
2. Soldering operations should be
accomplished as quick as possible;
within 10 seconds at 250°C 482°F solder
temperature or 3 seconds at 350°C
662°F. The header portion being sealed
with epoxy resin, undue subjection to
heat may cause loss of seal. Solder
should not be permitted to remain on the
header.
+
7
CAUTIONS FOR USE
Based on regulations regarding insulation distance, there is a
restriction on same-channel load connections between terminals
No. 2, 3 and 4, 5, as well as between No. 8, 9 and 10, 11. See
the figure below for an example.
2 3
11
10
4 5
9
8
11
O Between 2, 3 and 4, 5:
different channels, therefore not possible
2 3
4 5
10
9 8
O Between 2, 3 and 4, 5:
same channels, therefore possible
O Between 10, 11 and 8, 9: different channels, therefore not possible
O Between 10, 11 and 8, 9: same channels, therefore possible
No good
Good
For Cautions for Use, see Relay Technical Information (see catalog).
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