S
2a2b/3a1b/4a 4 A
polarized power relay
FEATURES
1. Compact with high sensitivity
The high-efficiency polarized
electromagnetic circuits of the 4-gap
balanced armature and our exclusive
spring alignment method achieves,
with high-sensitivity in a small
package, a relay that can be directly
controlled by a driver chip.
2. Strong resistance to vibration and
shock
Use of 4G-BA technology realizes
strong resistance to vibration and
shock.
3. High reliability and long life
Our application of 4G-BA technology,
along with almost perfectly complete
twin contact, ensures minimal contact
bounce and high reliability.
4. Ability to provide wide-ranging
control
Use of 4G-BA technology with goldclad silver alloy contacts in a twin
contact structure enables control
across a broad range from
microcurrents of 100 A 100 mV DC to
4 A 250 V AC.
5. Latching types available
With 4G-BA technology, as well as
single side stable types, convenient 2
coil latching types for circuit memory
applications are also available.
6. Wide variety of contact formations
available
The compact size of the 4G-BA
mechanism enables the provision of
many kinds of package, including
2a2b, 3a1b, and 4a. These meet your
needs across a broad range of
applications.
S RELAYS
7. Low thermal electromotive force
relay
High sensitivity (low power
consumption) is realized by 4G-BA
technology. Separation of the coil and
spring sections has resulted in a relay
with extremely low levels of thermal
electromotive force (approx. 0.3 V).
8. DIL terminal array
Deployed to fit a 2.54 mm .100 inch
grid, the terminals are presented in DIL
arrays which match the printed circuit
board terminal patterns commonly in
international use.
9. Relays that push the boundaries of
relay efficiency
High-density S relays take you close to
the limits of relay efficiency.
10.Sockets are available.
TYPICAL APPLICATIONS
Telecommunications equipment, data
processing equipment, facsimiles, alarm
equipment, measuring equipment.
4-GAP BALANCED ARMATURE MECHANISM
1. Armature mechanism has excellent
resistance to vibration and shock
The armature structure enables free
rotation around the armature center of
gravity. Because the mass is maintained
in balance at the fulcrum of the axis of
rotation, large rotational forces do not
occur even if acceleration is applied
along any vector. The mechanism has
proven to have excellent resistance to
vibration and shock. All our S relays are
based on this balanced armature
mechanism, which is able to further
provide many other characteristics.
2. High sensitivity and reliability
provided by 4-gap balanced armature
mechanism
As a (polarized) balanced armature, the
S relay armature itself has two
permanent magnets. Presenting four
interfaces, the armature has a 4-gap
structure. As a result, the rotational axis
at either end of the armature is
symmetrical and, in an energized into a
polarized state, the twin magnetic
armature interfaces are subject to
repulsion on one side and attraction on
the other. This mechanism, exclusive to
Panasonic, provides a highly efficient
polarized magnetic circuit structure that is
both highly sensitive and has a small
form factor. Moreover, suitability for
provision with many types of contact
array and other advantages promise to
make it possible to provide many of the
various characteristics that are coming to
be demanded of relays.
HOW IT WORKS (single side stable type)
1) When current is passed through the
coil, the yoke becomes magnetic and
polarized.
2) At either pole of the armature,
repulsion on one side and attraction on
the other side is caused by the interaction
of the poles and the permanent magnets
of the armature.
ds_61A07_en_s: 270513D
3) At this time, opening and closing
operates owing to the action of the
simultaneously moulded balanced
armature mechanism, so that when the
force of the contact breaker spring closes
the contact on one side, on the other
side, the balanced armature opens the
contact (2a2b).
Repulsion
Permanent magnet
N
Attraction
N
Residual plate
S
N
Attraction
S
S
Axis
Repulsion
1
S
ORDERING INFORMATION
S
DC
Contact arrangement
2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A
Operating function
Nil: Single side stable
L: 1 coil latching
L2: 2 coil latching
Coil voltage (DC)
3, 5, 6, 12, 24, 48 V
Note: UL/CSA approved type is standard.
TYPES
Contact arrangement
2 Form A 2 Form B
3 Form A 1 Form B
4 Form A
Nominal coil voltage
3V DC
5V DC
6V DC
12V DC
24V DC
48V DC
3V DC
5V DC
6V DC
12V DC
24V DC
48V DC
3V DC
5V DC
6V DC
12V DC
24V DC
48V DC
Single side stable
Part No.
S2-DC3V
S2-DC5V
S2-DC6V
S2-DC12V
S2-DC24V
S2-DC48V
S3-DC3V
S3-DC5V
S3-DC6V
S3-DC12V
S3-DC24V
S3-DC48V
S4-DC3V
S4-DC5V
S4-DC6V
S4-DC12V
S4-DC24V
S4-DC48V
1 coil latching
Part No.
S2-L-DC3V
S2-L-DC5V
S2-L-DC6V
S2-L-DC12V
S2-L-DC24V
S2-L-DC48V
S3-L-DC3V
S3-L-DC5V
S3-L-DC6V
S3-L-DC12V
S3-L-DC24V
S3-L-DC48V
S4-L-DC3V
S4-L-DC5V
S4-L-DC6V
S4-L-DC12V
S4-L-DC24V
S4-L-DC48V
2 coil latching
Part No.
S2-L2-DC3V
S2-L2-DC5V
S2-L2-DC6V
S2-L2-DC12V
S2-L2-DC24V
S2-L2-DC48V
S3-L2-DC3V
S3-L2-DC5V
S3-L2-DC6V
S3-L2-DC12V
S3-L2-DC24V
S3-L2-DC48V
S4-L2-DC3V
S4-L2-DC5V
S4-L2-DC6V
S4-L2-DC12V
S4-L2-DC24V
S4-L2-DC48V
Standard packing: Tube: 50 pcs.; Case: 500 pcs.
RATING
1. Coil data
1) Single side stable
Type
Nominal coil
voltage
Standard
3V DC
5V DC
6V DC
12V DC
24V DC
48V DC
Pick-up
Drop-out
voltage
voltage
(at 20C 68F) (at 20C 68F)
70%V or less
of nominal
voltage
(Initial)
10%V or more
of nominal
voltage
(Initial)
Nominal operating
current [10%]
(at 20C 68F)
66.7mA
38.5mA
33.3mA
16.7mA
8.4mA
5.6mA
Coil resistance
[10%]
(at 20C 68F)
45
130
180
720
2,850
8,500
Nominal operating
current [10%]
(at 20C 68F)
33mA
16mA
16mA
8mA
4mA
3mA
Coil resistance
[10%]
(at 20C 68F)
90
300
360
1450
5,700
16,000
Nominal operating
power
Coil inductance
200mW
192mW
200mW
200mW
202mW
271mW
Approx. 23mH
Approx. 65mH
Approx. 93mH
Approx. 370mH
Approx. 1,427mH
Approx. 3,410mH
Nominal operating
power
Coil inductance
99mW
80mW
96mW
96mW
96mW
144mW
Approx. 0.04mH
Approx. 0.14mH
Approx. 0.14mH
Approx. 0.6mH
Approx. 2.05mH
Approx. 8.9mH
Max. allowable
voltage
(at 40C 104F)
5.5V DC
9.0V DC
11.0V DC
22.0V DC
44.0V DC
75.0V DC
2) 1 coil latching
2
Type
Nominal coil
voltage
Standard
3V DC
5V DC
6V DC
12V DC
24V DC
48V DC
Pick-up
Drop-out
voltage
voltage
(at 20C 68F) (at 20C 68F)
70%V or less
of nominal
voltage
(Initial)
10%V or more
of nominal
voltage
(Initial)
Max. allowable
voltage
(at 40C 104F)
8.4V DC
15.3V DC
16.8V DC
33.7V DC
66.7V DC
111V DC
ds_61A07_en_s: 270513D
S
3) 2 coil latching
Type
Nominal coil
voltage
Set voltage
Reset voltage
(at 20C 68F) (at 20C 68F)
Nominal operating
current [10%]
(at 20C 68F)
Reset
Set coil
coil
Coil resistance
[10%]
(at 20C 68F)
Reset
Set coil
coil
Nominal operating
power
(at 20C 68F)
Reset
Set coil
coil
3V DC
66.7mA
66.7mA
45
45
200mW
200mW
5V DC
38.5mA
38.5mA
130
130
192mW
192mW
33.7mA
33.7mA
180
180
200mW
200mW
16.7mA
16.7mA
720
720
200mW
200mW
24V DC
8.4mA
8.4mA
2,850
2,850
202mW
202mW
48V DC
7.4mA
7.4mA
6,500
6,500
355mW
355mW
6V DC
Standard
12V DC
70%V or less
of nominal
voltage
(Initial)
70%V or less
of nominal
voltage
(Initial)
Coil inductance
Set coil
Approx.
10mH
Approx.
31mH
Approx.
40mH
Approx.
170mH
Approx.
680mH
Approx.
1,250mH
Reset
coil
Approx.
10mH
Approx.
31mH
Approx.
40mH
Approx.
170mH
Approx.
680mH
Approx.
1,250mH
Max. allowable
voltage
(at 40C 104F)
5.5V DC
9.0V DC
11.0V DC
22.0V DC
44.0V DC
65.0V DC
2. Specifications
Characteristics
Contact
Rating
Item
Arrangement
Initial contact resistance, max.
Electrostatic capacitance (initial)
Contact material
Thermal electromotive force (at nominal coil voltage)
(initial)
Nominal switching capacity (resistive load)
Max. switching power (resistive load)
Max. switching voltage
Max. switching current
Minimum operating power
Nominal operating power
Min. switching capacity (Reference value)*1
Insulation resistance (Initial)
Electrical
characteristics
Breakdown voltage
(Initial)
Between open contacts
Between contact sets
Between contact and coil
Temperature rise (at 20C 68F)
Operate time [Set time] (at 20C 68F)
Release time [Reset time] (at 20C 68F)
Mechanical
characteristics
Expected life
Conditions
Functional
Destructive
Functional
Vibration resistance
Destructive
Mechanical
Electrical
Shock resistance
Conditions for operation, transport and storage*2
Max. operating speed
Unit weight
Specifications
2 Form A 2 Form B, 3 Form A 1 Form B, 4 Form A
Max. 50 m (By voltage drop 6 V DC 1A)
Approx. 3pF
Au clad Ag alloy (Cd free)
Approx. 3V
4 A 250 V AC, 3 A 30 V DC
1,000 VA, 90 W
250 V AC, 48 V DC (30 to 48 V DC at less than 0.5 A)
4 A (AC), 3 A (DC)
100 mW (Single side stable, latching)
200 mW (Single side stable, latching)
100A 100 m V DC
Min. 10,000M (at 500V DC)
Measurement at same location as “Initial breakdown voltage” section.
750 Vrms for 1min. (Detection current: 10mA.)
1,000 Vrms for 1min. (Detection current: 10mA.)
1,500 Vrms for 1min. (Detection current: 10mA.)
Max. 35C
(By resistive method, nominal voltage applied to the coil; contact carrying current: 4A.)
Max. 15 ms [15 ms] (Nominal voltage applied to the coil, excluding contact bounce time.)
Max. 10 ms [15 ms] (Nominal voltage applied to the coil, excluding contact bounce time.)
(without diode)
Min. 490 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10s.)
Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
10 to 55 Hz at double amplitude of 3 mm (Detection time: 10s.)
10 to 55 Hz at double amplitude of 4 mm
Min. 108 (at 50 cps)
Min. 105 (4 A 250 V AC), Min. 2105 (3 A 30 V DC) (at 20 times/min.)
Ambient temperature: –55C to +65C –67F to +149F
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
20 times/min. for maximum load, 50 cps for low-level load (1 mA 1 V DC)
Approx. 8 g .28 oz
*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.
*2 Refer to “6. Usage, Storage and Transport Conditions“ in AMBIENT ENVIRONMENT section in Relay Technical Information.
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3
S
REFERENCE DATA
1. Maximum switching power
2. Life curve
3. Contact reliability
Condition: 1V DC, 1mA
Detection level 10
Tested Sample: S4-24V, 10pcs
1,000
99.9
99.0
95.0
1,000
DC resistive load
AC resistive load
70.0
50.0
30.0
Life, ×104
Contact voltage, V
500
100
100
10.0
5.0
50
30
10
10
0.1
1
0
10
2.0
1.0
0.5
125 V AC
(cosϕ = 1.0)
250 V AC
(cosϕ = 1.0)
1
2
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
Contact current, A
7
5. Operate and release time
(Single side stable type)
Tested Sample: S4-24V, 10pcs
90
18
80
70
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
Operate/release time, ms
20
90
Temperature rise, °C
100
Temperature rise, °C
100
1.2
1
2
3
4
5
(2)
+30
(3)
Release time (with diode)
10
Max.
8
Min.
Operate time
6
Max.
Min.
4 Max.
Min.
2
Release time
0
80
100
6
120
140
Coil applied voltage, %V
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.
Single side stable
Drop-out voltage
0
Pick-up voltage
-30
12
7. Thermal electromotive force
Rate of change, %
Rate of change, %
(1)
14
Contact current, A
6. Influence of adjacent mounting
(1) & (3) relays
are energized
16
5
Inter-relay distance, mm
10
+30
2 coil latching
200
NR-H
100
0
NF relay S relay
Pick-up voltage
-30
5
Inter-relay distance, mm
10
2
4
6
8
Minute
10
12
Single side stable
φ
Pick-up voltage
0
Drop-out voltage
Rate of change, %
-30
+30
50
0
-30
Pick-up voltage
50
100
G
4
+30
Single side stable
φ
Drop-out voltage
0
Pick-up voltage
-30
100
G
2 coil latching
Rate of change, %
+30
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
ds_61A07_en_s: 270513D
S
DIMENSIONS(mm inch)
CAD Data
Data from our Web site.
Download CAD
External dimensions
CAD Data
Single side stable
(Deenergized position)
1
1
.039
10±0.5
.394±0.02
4
.157
0.5
.020
0.4
1.0 .016
.039
1.4
.055
3
.118
Schematic (Bottom view)
12
.472
28±0.5
1.102±0.02
1
2
3
4
5
12
11
10
9
8
2a2b
7.62
.300
0.5
.020
General tolerance: 0.3 .012
6
1
2
3
4
5
6
+
+
-
-
-
10
9
8
7
12
11
10
9
8
7
2
3
4
5
6
1
2
3
4
5
6
+
+
+
-
-
-
12
11
10
9
8
7
12
11
10
9
8
7
1
2
3
4
5
6
1
2
3
4
5
6
4a
12-1.3 dia.
.047-.051 dia.
5
11
PC board pattern (Copper-side view)
12
2.54
.100
4
1
3a1b
5.08
.200
3
+
12
6
7.62 12
.472
7 .300
2
2 coil latching
(Reset condition)
+
+
+
-
-
-
11
10
9
8
7
12
11
10
9
8
7
2.54
.100
Tolerance: 0.1 .004
SAFETY STANDARDS
File No.
E43028
UL/C-UL (Recognized)
Contact rating
4A 250V AC, 1/20HP 125V AC (FLA1.5A)
1/20HP 250V AC (FLA0.75A), 3A 30V DC
File No.
LR26550
etc.
CSA (Certified)
Contact rating
4A 250V AC, 1/20HP 125V AC, 1/20HP 250V AC
3A 30V DC
NOTES
1. 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
2. Please note that when this relay
(1 Form A 1 Form B types) operates and
releases, contacts a and b may go ON at
the same time.
4 5
9
8
11
2 3
4 5
10
9 8
• Between 2, 3 and 4, 5:
• Between 2, 3 and 4, 5:
different channels, therefore not possible
• Between 10, 11 and 8, 9:
different channels, therefore not possible
• Between 10, 11 and 8, 9:
same channels, therefore possible
same channels, therefore possible
No good
Good
For Cautions for Use, see Relay Technical Information.
ds_61A07_en_s: 270513D
5
S
S RELAYS
SOCKET
ACCESSORIES
DIMENSIONS (Unit: mm inch)
PC board pattern
(Copper-side view)
External dimensions
12.4±0.6
.488±.024
7.6
.299
5.085.085.085.085.08
12-1.6 dia. hole .200.200.200.200.200
12-.063 dia. hole
Tolerance: 0.1 .004
18.3±0.6
.720±.024
1.2±0.3
.047±.012
15.5±0.6
.610±.024
4.85±0.3
.191±.012
1.5±0.3
.059±.012
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
General tolerance: 0.3 .012
S-PS
TYPES
Product name
S Relays Socket
Part No.
S-PS
SPECIFICATIONS
Maximum continuous current
Breakdown voltage
Insulation resistance
Heat resistance
4A
Note: Don’t insert or remove relays while in the energized condition.
1,500 Vrms between terminals
More than 100 M between terminals at 500 V DC Mega
150 3C (302 5.4F) for 1 hour.
NOTES
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
6
ds_61A07_en_s: 270513D
