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en_ds_61105_0000: 130804D
SPECIFICATIONS
TYPICAL APPLICATIONS
4 A CAPACITY,
THE VARIETY OF CONTACT
ARRANGEMENTS S RELAYS
mm inch
28.0
1.102
12.0
.472
10.4
.409
FEATURES
• 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
Contacts
Coil (polarized) (at 20°C 68°F)
Notes:
**1This 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.
*1Measurement at same location as “Initial breakdown voltage” section
*2Detection current: 10mA
*3Excluding contact bounce time
*4Half-wave pulse of sine wave: 11ms; detection time: 10µs
*5Half-wave pulse of sine wave: 6ms
*6Detection time: 10µs
*7Refer to 6. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (see catalog).
Characteristics (at 25°C 77°F 50% Relative humidity)
Arrangement
2 Form A 2 Form B,
3 Form A 1 Form B,
4 Form A
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)
Nominal switching capacity 4 A 250 V AC, 3 A 30 V DC
Maximum switching power 1,000 VA, 90 W
Maximum switching voltage 250 V AC, 30 V DC
(48 VDC at less than 0.5 A)
Max. switching current 4 A (AC), 3 A (DC)
Min. switching capacity**1100µA 100 m V DC
Expected
life (min.
operations)
Mechanical (at 50 cps) 108
Electrical
(at 20 cpm)
4 A 250 V AC 105
3 A 30 V DC 2 × 105
Single side
stable
Minimum operating power Approx. 100 mW
Nominal operating power Approx. 200 mW
Latching Minimum set and reset Approx. 100 mW
Nominal set and reset Approx. 200 mW
Max. operating speed
20 cpm for maximum load,
50 cps for low-level load
(1 mA 1 V DC)
Initial insulation resistance*110,000 MΩ at 500 V DC
Initial
breakdown
voltage*2
Between open contacts 750 Vrms
Between contact sets 1,000 Vrms
Between contacts and
coil 1,500 Vrms
Operate time*3
(at nominal voltage)(at 20°C) Max. 15 ms (Approx. 8 ms)
Release time (without diode)*3
(at nominal voltage)(at 20°C) Max. 10 ms (Approx. 5 ms)
Set time*3 (latching)
(at nominal voltage)(at 20°C) Max. 15 ms (Approx. 8 ms)
Reset time*3 (latching)
(at nominal voltage)(at 20°C) Max. 15 ms (Approx. 8 ms)
Initial contact bounce, max. 1 ms
Temperature rise
(at nominal voltage)(at 20°C)
Max. 35°C with nominal coil
voltage and at maximum
switching current
Shock resistance Functional*4Min. 490 m/s2 {50 G}
Destructive*5Min. 980 m/s2 {100 G}
Vibration resistance
Functional*6176.4 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
Conditions for operation,
transport and storage*7
(Not freezing and condens-
ing at low temperature)
Ambient
temp.
–40°C to +65°C
–40°F to +149°F
Humidity 5 to 85% R.H.
Unit weight Approx. 8 g .28 oz
Telecommunications equipment, data processing equipment,
facsimiles, alarm equipment, measuring equipment.
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2en_ds_61105_0000: 130804D
ORDERING INFORMATION
TYPES AND COIL DATA at 20°C 68°F
Single side stable
1 coil latching
2 coil latching
Note: Insert 2, 3 or 4 in T for contact form required.
DIMENSIONS mm inch
Type
Nominal
voltage,
V DC
Pick-up
voltage,
V DC (max.)
Drop-out
voltage,
V DC (min.)
Nominal
operating
current,
mA
Coil resistance,
Ω (±10%)
Inductance,
mH
Nominal
operating
power,
mW
Maximum
allowable
voltage,
V DC (40°C)
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
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
Type
Nominal
voltage,
V DC
Pick-up
voltage,
V DC (max.)
Drop-out
voltage
V DC (min.)
Nominal oper-
ating current,
mA
Coil resis-
tance, Ω
(±10%)
Inductance,
mH
Nominal
operating
power,
mW
Maximum
allowable
voltage,
V DC (40°C)
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
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
Type Nominal voltage,
V DC
Set and reset
voltage,
V DC (max.)
Nominal operating
current,
mA
Coil resistance,
Ω (±10%)
Inductance,
mH
Nominal
operating
power,
mW
Maximum
allowable
voltage,
V DC (40°C)
Coil I Coil II Coil I Coil II
ST-L2-3V 3 2.1 66.7 45 45 10 10 200 5.5
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
Product name Contact arrangement Operating function Coil voltage, V DC
S2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A
Nil: Single side stable
L: 1 coil latching
L2: 2 coil latching
3, 5, 6,12, 24, 48
S2L2 48
Ex.
Notes: 1) Standard packing; Carton 50 pcs. Case 500 pcs.
2) UL/CSA approved type is standard.
V
General tolerance: ±0.3 ±.012
PC board pattern (Copper-side view)
Tolerance: ±0.1 ±.003
10±0.5
.394±0.02
12
.472
7.62
.300
123456
12 11 10 9 8 7
3
.118
1
.039
4
.157 0.4
.016
1.4
.055 1.0
.039
5.08
.200
0.5
.020
0.5
.020
7.62
.300
28±0.5
1.102±0.02 12
.472
2.54
.100
2.54
.100
12-1.3 DIA.
.047-.051 DIA.
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en_ds_61105_0000: 130804D
Schematic (Bottom view)
REFERENCE DATA
Single side stable
Deenergized position
2a2b 3a1b 4a
123456
12 11 10 9 8 7
-
+
123456
12 11 10 9 8 7
-
+
123456
12 11 10 9 8 7
-
+
2 coil latching
Diagram shows the “reset”
position when terminals 6
and 7 are energized.
Energize terminals 1 and
12 to transfer contacts.
2a2b 3a1b 4a
123456
12 11 10 9 8 7
Set Reset
-
+
-
+
-
Set Reset
+
123456
12 11 10 9 8 7
-
+
-
Set Reset
+
123456
12 11 10 9 8 7
-
+
1. Maximum switching power 2. Life curve 3. Contact reliability
Condition: 1V DC, 1mA
Detection level 10 Ω
Tasted Sample: S4-24V, 10pcs
100
1,000
10
0.1 1 10
Contact current, A
Contact voltage, V
DC resistive load AC resistive load 1,000
500
100
50
30
10
012345
Contact current, A
Life, ×104
125 V AC
(cosϕ = 1.0)
250 V AC
(cosϕ = 1.0)
99.9
99.0
95.0
0.1 1.0 10.0
0.2
0.5
1.0
2.0
5.0
10.0
30.0
50.0
70.0
No. of operations, ×10
7
m = 1.6
µ: 79 million time
σ: 51 million time
95% reliability limit:
14.6 million times
(weibul probability paper)
4.-(1) Coil temperature rise
Tested Sample: S4-24V, 4 Form A
4.-(2) Coil temperature rise
Tested Sample: S4-24V, 4 Form A
5. Operate and release time
(Single side stable type)
Tested Sample: S4-24V, 10pcs
4A
0A
100
0.2 0.4 0.6 0.8 1.0 1.2
90
80
70
60
50
40
30
20
10
0
Coil operating power, W
Temperature rise, °C
100
123456
90
80
70
60
50
40
30
20
10
0
Coil operating
power, 0.2 W
Contact current, A
Temperature rise, °C
Min.
Max. Min.
Max.
Min.
Max.
80 100 120 140
20
18
16
14
12
10
8
6
4
2
0
Coil applied voltage, %V
Operate/release time, ms
Release time (with diode)
Operate time
Release time
6. Influence of adjacent mounting
510
–30
0
+30
510
–30
0
+30
(1) (2) (3) (1) & (3) relays
are energized
Rate of change, %
Rate of change, %
Single side stable 2 coil latching
Drop-out voltage
Pick-up voltage Pick-up voltage
Inter-relay distance, mm Inter-relay distance, mm
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.
7. Thermal electromotive force
200
2 4 6 8 10 12
100
Minute
NR-H
NF relay S relay
Thermal electromotive force, µV
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4en_ds_61105_0000: 130804D
ACCESSORIES
8. Effect from an external magnetic field
0
0
50 100
–30
+30
50 100
–30
+30
Rate of change, %Rate of change, %
G
G
Pick-up voltage
Pick-up voltage
Drop-out voltage
Single side stable
2 coil latching
φ
50 100
–30
–30
0
+30
50 100
0
+30
Rate of change, %Rate of change, %
G
G
Pick-up voltage
Pick-up voltage
Drop-out voltage
Single side stable
2 coil latching
φ
S Relay Socket,
S-PS
Specifications
(Note: Don't insert or remove relays while in the energized condition.)
Breakdown voltage 1,500 Vrms between terminals
Insulation resistance More than 100 MΩ between terminals at 500 V DC Mega
Heat resistance 150 ±3°C (302 ±5.4°F) for 1 hour.
Maximum continuous current 4 A
Dimensions mm inch
PC board pattern (Copper-side view)
12.4±0.6
.488±.024
18.3±0.6
.720±.024 15.5±0.6
.610±.024
3.4±0.3
.134±.012
0.4±0.1
.016±.004
1.2±0.3
.047±.012
4.85±0.3
.191±.012 5.08±0.3
.200±.012
32.4±0.6
1.276±.024
1.5±0.3
.059±.012 1.5±0.3
.059±.012
7.62±0.3
.300±.012
Terminal width: 1.3 .051
Terminal thickness: 1.2 .047
7.6
.299
5.08
.2005.08
.2005.08
.2005.08
.2005.08
.200
12-1.6 DIA. HOLE
12-.063 DIA. HOLE
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
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en_ds_61105_0000: 130804D
NOTES
CAUTIONS FOR USE
For Cautions for Use, see Relay Technical Information (see catalog).
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 one-
half.
Reset position of 2a2b type 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.
123456
12 11 10 9 8 7
-
+
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.
4
25
3
10 9
4
8
11
5
23
98
11
O
Between 2, 3 and 4, 5:
O
Between 10, 11 and 8, 9:same channels, therefore possible
same channels, therefore possible
O
Between 2, 3 and 4, 5:
O
Between 10, 11 and 8, 9:different channels, therefore not possible
different channels, therefore not possible
10
No good Good
