Datasheet S2-24V, S3-24V, S4-5V Specification

S

2a2b/3a1b/4a 4A polarized

power relays

S RELAYS

Compliance with RoHS Directive

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 µA 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.

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 µV).

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

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.

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).

Panasoinc Electric Works, 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.

Repulsion

N

Attraction

N

S

S

Axis

Residual plate

Attraction

Repulsion

Permanent magnet

N

S

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OPYRIGHT Panasonic Electric Works Co., Ltd.

ORDERING INFORMATION

SEB

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

Nominal coil voltage (DC)
3, 5, 6, 12, 24, 48 V

Notes: 1. *1 coil latching type are manufactured by lot upon receipt of order.

2. Certified by UL and CSA

TYPES

Contact arrangement Nominal coil voltage

3V DC S2EB-3V S2EB-L2-3V
5V DC S2EB-5V S2EB-L2-5V

2 Form A 2 Form B

3 Form A 1 Form B

4 Form A

Standard packing: Carton: 50 pcs.; Case: 500 pcs.

* For sockets, see page 59.

6V DC S2EB-6V S2EB-L2-6V
12V DC S2EB-12V S2EB-L2-12V
24V DC S2EB-24V S2EB-L2-24V
48V DC S2EB-48V S2EB-L2-48V

3V DC S3EB-3V S3EB-L2-3V

5V DC S3EB-5V S3EB-L2-5V

6V DC S3EB-6V S3EB-L2-6V
12V DC S3EB-12V S3EB-L2-12V
24V DC S3EB-24V S3EB-L2-24V
48V DC S3EB-48V S3EB-L2-48V

3V DC S4EB-3V S4EB-L2-3V

5V DC S4EB-5V S4EB-L2-5V

6V DC S4EB-6V S4EB-L2-6V
12V DC S4EB-12V S4EB-L2-12V
24V DC S4EB-24V S4EB-L2-24V
48V DC S4EB-48V S4EB-L2-48V

S

Single side stable 2 coil latching

Part No. Part No.

RATING

1. Coil data

1) Single side stable

Type

Standard

Nominal coil

voltage

3V DC
5V DC 38.5mA 130Ω 192mW Approx. 65mH 9.0V DC

6V DC 33.3mA 180Ω 200mW Approx. 93mH 11.0V DC
12V DC 16.7mA 720Ω 200mW Approx. 370mH 22.0V DC
24V DC 8.4mA 2,850Ω 202mW Approx. 1,427mH 44.0V DC
48V DC 5.6mA 8,500Ω 271mW Approx. 3,410mH 75.0V DC

Pick-up
voltage

(at 20°C 68°F)

70%V or less

of nominal

voltage

(Initial)

Drop-out

voltage

(at 20°C 68°F)

10%V or more

of nominal

voltage

(Initial)

Nominal operating

current [±10%]
(at 20°C 68°F)

66.7mA 45Ω 200mW Approx. 23mH 5.5V DC

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Coil resistance

[±10%]

(at 20°C 68°F)

Nominal operating

power

OPYRIGHT Panasonic Electric Works Co., Ltd.

Coil inductance

Max. applied

voltage

(at 40°C 104°F)

S

2) 2 coil latching

Nominal operating

Type

Standard

Nominal coil

voltage

3V DC

5V DC 38.5mA 38.5mA 130Ω 130Ω 192mW 192mW

6V DC 33.7mA 33.7mA 180Ω 180Ω 200mW 200mW

12V DC 16.7mA 16.7mA 720Ω 720Ω 200mW 200mW

24V DC 8.4mA 8.4mA 2,850Ω 2,850Ω 202mW 202mW

48V DC 7.4mA 7.4mA 6,500Ω 6,500Ω 355mW 355mW

Set voltage

(at 20°C 68°F)

70%V or less

of nominal

voltage

(Initial)

Reset voltage

(at 20°C 68°F)

70%V or less

of nominal

voltage

(Initial)

current [±10%]
(at 20°C 68°F)

Set coil

66.7mA 66.7mA 45Ω 45Ω 200mW 200mW

Reset

coil

2. Specifications

Characteristics Item Specifications

Arrangement 2 Form A 2 Form B, 3 Form A 1 Form B, 4 Form A
Contact resistance (Initial) Max. 50 mΩ (By voltage drop 6 V DC 1A)

Contact

Rating

Electrical
characteristics

Mechanical
characteristics

Expected life

Conditions

Unit weight Approx. 8 g .28 oz

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.

*2. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage

conditions in NOTES.

Electrostatic capacitance (initial) Approx. 3pF
Contact material Au clad Ag alloy (Cd free)
Thermal electromotive force (at nominal coil voltage)

(initial)
Nominal switching capacity (resistive load) 4 A 250 V AC, 3 A 30 V DC
Max. switching power (resistive load) 1,000 VA, 90 W
Max. switching voltage 250 V AC, 48 V DC (30 to 48 V DC at less than 0.5 A)
Max. switching current 4 A (AC), 3 A (DC)
Minimum operating power 100 mW (Single side stable, 2 coil latching)
Nominal operating power 200 mW (Single side stable, 2 coil latching)
Min. switching capacity (Reference value)*

Insulation resistance (Initial)

Breakdown voltage
(Initial)

Temperature rise (coil) (at 20°C 68°F)

Operate time [Set time] (at 20°C 68°F) Max. 15 ms [15 ms] (Nominal coil voltage applied to the coil, excluding contact bounce time.)

Release time [Reset time] (at 20°C 68°F)

Shock resistance

Vibration resistance

Mechanical Min. 108 (at 50 cps)
Electrical Min. 105 (4 A 250 V AC), Min. 2×105 (3 A 30 V DC) (at 20 times/min.)

Conditions for operation, transport and storage*

Max. operating speed 20 times/min. for maximum load, 50 cps for low-level load (1 mA 1 V DC)

Between open contacts 750 Vrms for 1min. (Detection current: 10mA.)
Between contact sets 1,000 Vrms for 1min. (Detection current: 10mA.)
Between contact and coil 1,500 Vrms for 1min. (Detection current: 10mA.)

Functional Min. 490 m/s
Destructive Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
Functional 10 to 55 Hz at double amplitude of 3 mm (Detection time: 10µs.)
Destructive 10 to 55 Hz at double amplitude of 4 mm

1

2

Coil resistance

[±10%]

(at 20°C 68°F)

Set coil

Approx. 3µV

100µA 100 m V DC
Min. 10,000MΩ (at 500V DC)

Measurement at same location as “Breakdown voltage” section.

Max. 35°C
(By resistive method, nominal coil voltage applied to the coil; contact carrying current: 4A.)

Max. 10 ms [15 ms] (Nominal coil voltage applied to the coil, excluding contact bounce time.)
(without diode)

Ambient temperature: –55°C to +65°C –67°F to +149°F
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)

Reset

coil

2

(Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)

Nominal operating

power

(at 20°C 68°F)

Set coil

Reset

coil

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. applied

voltage

(at 40°C 104°F)

5.5V DC

9.0V DC

11.0V DC

22.0V DC

44.0V DC

65.0V DC

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OPYRIGHT Panasonic Electric Works Co., Ltd.

REFERENCE DATA

1. Maximum switching power 2. Life curve 3. Contact reliability

1,000

100

Contact voltage, V

DC resistive load

10

AC resistive load

0.1 1 10
Contact current, A

1,000

500

4

100

Life, ×10

50

30

10

012345

Contact current, A

125 V AC
(cosϕ = 1.0)

250 V AC
(cosϕ = 1.0)

Condition: 1V DC, 1mA
Detection level 10 Ω
Tasted Sample: S4EB-24V, 10pcs

99.9

99.0

95.0

70.0

50.0

30.0

10.0

5.0

2.0

1.0

0.5

0.2

0.1

m = 1.6

µ: 79 million time
σ: 51 million time

95% reliability limit:

14.6 million times
(weibul probability paper)

1.0 10.0

No. of operations, ×10

S

7

4.-(1) Coil temperature rise

Tested Sample: S4EB-24V, 4 Form A

100

90

80

70

60

50

40

Temperature rise, °C

30

20

10

0

0.2 0.4 0.6 0.8 1.0 1.2
Coil operating power, W

6. Influence of adjacent mounting

(1) (2) (3)

Single side stable 2 coil latching

+30

0

Rate of change, %

(1) & (3) relays
are energized

Drop-out voltage

Pick-up voltage

4.-(2) Coil temperature rise

Tested Sample: S4EB-24V, 4 Form A

100

90

80

4A

0A

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.

70

60

50

40

Temperature rise, °C

30

20

10

0

+30

0

Rate of change, %

Coil operating
power, 0.2 W

123456

Contact current, A

Pick-up voltage

5. Operate and release time
(Single side stable type)

Tested Sample: S4EB-24V, 10pcs

20

18

16

14

12

10

8

Operate/release time, ms

6

4

Max.
Min.

2

0

Release time (with diode)

Operate time

Release time

80 100 120 140

Coil applied voltage, %V

7. Thermal electromotive force

200

NR-H

100

Thermal electromotive force, µV

NF relay

Max.
Min.

Max.
Min.

S relay

–30

510

Inter-relay distance, mm Inter-relay distance, mm

8. Effect from an external magnetic field

Single side stable

+30

0

Rate of change, %Rate of change, %

–30

2 coil latching

+30

0

–30

φ

Pick-up voltage

Drop-out voltage

50 100

G

Pick-up voltage

50 100

G

–30

Single side stable

+30

0

Rate of change, %Rate of change, %

–30

2 coil latching

+30

0

–30

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510

φ

Drop-out voltage

Pick-up voltage

50 100

G

Pick-up voltage

50 100

G

OPYRIGHT Panasonic Electric Works Co., Ltd.

246810 12

Minute

S

123456

12 11 10 9 8 7

-

+

123456

12 11 10 9 8 7

-

+

123456

12 11 10 9 8 7

-

+

DIMENSIONS (mm inch)

CAD Data

28±0.5 12

1.102±0.02 .472

1

.039

4

.157

3

123456

.118

12 11 10 9 8 7

0.5

.020

The CAD data of the products with a CAD Data mark can be downloaded from: http://panasonic-electric-works.net/ac

External dimensions

Schematic (Bottom view)

Single side stable

(Deenergized position)

10±0.5

.394±0.02

1.4

.055

1.0

.039

5.08

.200

0.4

.016

7.62

.300

12

.472

7.62

.300

0.5

.020

2a2b

3a1b

General tolerance: ±0.3 ±.012

PC board pattern (Copper-side view)

2.54

12-1.3 dia.

.047-.051 dia.

2.54

.100

.100

4a

Tolerance: ±0.1 ±.004

SAFETY STANDARDS

UL/C-UL (Recognized) CSA (Certified)

File No. Contact rating File No. Contact rating

E43028 4A 250V AC, 1/20HP 125V AC (FLA1.5A)

1

/20HP 250V AC (FLA0.75A), 3A 30V DC

LR26550
etc.

4A 250V AC,
3A 30V DC

1

/20HP 125V AC, 1/20HP 250V AC

2 coil latching

(Reset condition)

123456

+

-

12 11 10 9 8 7

123456

+

-

12 11 10 9 8 7

123456

+

-

12 11 10 9 8 7

+

-

+

-

+

-

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.

23

10

11

• • Between 2, 3 and 4, 5:
different channels, therefore not possible
Between 10, 11 and 8, 9:
different channels, therefore not possible

No good Good

4

5

3

9

8

2

11

10

• • Between 2, 3 and 4, 5:
same channels, therefore possible
Between 10, 11 and 8, 9:
same channels, therefore possible

4

5

8

9

For Cautions for Use.

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.

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OPYRIGHT Panasonic Electric Works Co., Ltd.

S

Compliance with RoHS Directive

ACCESSORIES

DIMENSIONS (mm inch)

CAD Data

12.4±0.6

.488±.024

18.3±0.6

.720±.024

1.2±0.3

.047±.012

4.85±0.3

.191±.012

1.5±0.3 1.5±0.3

.059±.012 .059±.012

General tolerance: ±0.3 ±.012

External dimensions

5.08±0.3

.200±.012

32.4±0.6

1.276±.024

15.5±0.6

.610±.024

The CAD data of the products with a CAD Data mark
can be downloaded from: http://panasonic-electric-works.net/ac

12-.063 dia. hole

0.4±0.1

.016±.004

3.4±0.3

7.62±0.3

.300±.012

Terminal width: 1.3
Terminal thickness: 1.2

.134±.012

.051

S RELAYS

SOCKET

PC board pattern

(Copper-side view)

7.6

.299

5.08 5.0 85.0 8 5.08 5.08

12-1.6 dia. hole

.047

.200.200.200.200.200

Tolerance: ±0.1 ±.004

TYPES

Product name Part No.

S Relays Socket S-PS

SPECIFICATIONS

Maximum continuous current

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.

Note: Don’t insert or remove relays while in the energized condition.

4 A

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.

Removing method:
(1) Remove the relay straight from the
socket holding the shaded portion of the
relay as shown in Fig. 2.

(2) When sockets are mounted in close
proximity, use a slotted screw driver as
shown in Fig. 3.

Rib

Fig. 1

Fig. 2

Fig. 3

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