Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
S
ASCTB207E 201202-T
4-GAP BALANCED ARMATURE MECHANISM
HOW IT WORKS (single side stable type)
2a2b/3a1b/4a 4A polarized
power relays S RELAYS
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.
RoHS compliant
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 gold-
clad 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 rela ys take y ou close to
the limits of relay efficiency.
10. Sockets are available.
TYPICAL APPLICATIONS
Telecommunications equipment, data
processing equipment, facsimiles, alarm
equipment, measuring equipment.
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 Corporation, pro vides a highly
efficient polarized magnetic circuit
structure that is both highly sensitive and
has a small form factor. Moreover,
suitability f or 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.
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 inter action
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).
Axis
Repulsion
Attraction
Permanent magnet
Residual plate
Attraction
Repulsion
N
SN
SN
S
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
S
ASCTB207E 201202-T
ORDERING INFORMATION
TYPES
Standard packing: Carton: 50 pcs.; Case: 500 pcs.
* For sockets, see page 55.
RATING
1. Coil data
1) Single side stable
Contact arrangement Nominal coil voltage Single side stable 2 coil latching
Part No. Part No.
2 Form A 2 Form B
3V DC S2EB-3V S2EB-L2-3V
5V DC S2EB-5V S2EB-L2-5V
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
3 Form A 1 Form B
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
4 Form A
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
Type Nominal coil
voltage
Pick-up
voltage
(at 20°C 68°F)
Drop-out
voltage
(at 20°C 68°F)
Nominal operating
current [±10%]
(at 20°C 68°F)
Coil resistance
[±10%]
(at 20°C 68°F)
Nominal operating
power Coil inductance Max. applied
voltage
(at 40°C 104°F)
Standard
3V DC
70%V or less
of nominal
voltage
(Initial)
10%V or more
of nominal
voltage
(Initial)
66.7mA 45Ω200mW Approx. 23mH 5.5V DC
5V DC 38.5mA 130Ω192mW Approx. 65mH 9.0V DC
6V DC 33.3mA 180Ω200mW Approx. 93mH 11.0V DC
12V DC 16.7mA 720Ω200mW Approx. 370mH 22.0V DC
24V DC 8.4mA 2,850Ω202mW Approx. 1,427mH 44.0V DC
48V DC 5.6mA 8,500Ω271mW Approx. 3,410mH 75.0V DC
Nominal coil voltage (DC)
3, 5, 6, 12, 24, 48 V
Contact arrangement
2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A
SEB
Operating function
Nil:
L:
L2:
Single side stable
1 coil latching*
2 coil latching
Notes:1. *1 coil latching type are manufactured by lot upon receipt of order.
2. Certified by UL and CSA
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
S
ASCTB207E 201202-T
2) 2 coil latching
2. Specifications
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.
Type Nominal coil
voltage Set voltage
(at 20°C 68°F)Reset voltage
(at 20°C 68°F)
Nominal operating
current [±10%]
(at 20°C 68°F)
Coil resistance
[±10%]
(at 20°C 68°F)
Nominal operating
power
(at 20°C 68°F)Coil inductance Max. applied
voltage
(at 40°C 104°F)
Set coil Reset
coil Set coil Reset
coil Set coil Reset
coil Set coil Reset
coil
Standard
3V DC
70%V or less
of nominal
voltage
(Initial)
70%V or less
of nominal
voltage
(Initial)
66.7mA 66.7mA 45Ω45Ω200mW 200mW Approx.
10mH Approx.
10mH 5.5V DC
5V DC 38.5mA 38.5mA 130Ω130Ω192mW 192mW Approx.
31mH Approx.
31mH 9.0V DC
6V DC 33.7mA 33.7mA 180Ω180Ω200mW 200mW Approx.
40mH Approx.
40mH 11.0V DC
12V DC 16.7mA 16.7mA 720Ω720Ω200mW 200mW Approx.
170mH Approx.
170mH 22.0V DC
24V DC 8.4mA 8.4mA 2,850Ω2,850Ω202mW 202mW Approx.
680mH Approx.
680mH 44.0V DC
48V DC 7.4mA 7.4mA 6,500Ω6,500Ω355mW 355mW Approx.
1,250mH Approx.
1,250mH 65.0V DC
Characteristics Item Specifications
Contact
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)
Electrostatic capacitance (initial) Approx. 3pF
Contact material Au clad Ag alloy (Cd free)
Thermal electromotive force (at nominal coil voltage)
(initial) Approx. 3µV
Rating
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)*1100µA 100 m V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 10,000MΩ (at 500V DC)
Measurement at same location as “Breakdown voltage” section.
Breakdown voltage
(Initial)
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.)
Temperature rise (coil) (at 20°C 68°F)Max. 35°C
(By resistive method, nominal coil voltage applied to the coil; contact carrying current: 4A.)
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)Max. 10 ms [15 ms] (Nominal coil voltage applied to the coil, excluding contact bounce time.)
(without diode)
Mechanical
characteristics
Shock resistance Functional Min. 490 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)
Destructive Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
Vibration resistance 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
Expected life 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 Conditions for operation, transport and storage*2Ambient temperature: –55°C to +65°C –67°F to +149°F
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed 20 times/min. for maximum load, 50 cps for low-level load (1 mA 1 V DC)
Unit weight Approx. 8 g .28 oz
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
S
ASCTB207E 201202-T
REFERENCE DATA
1. Maximum switching power 2. Life curve 3. Contact reliability
Condition: 1V DC, 1mA
Detection level 10 Ω
Tasted Sample: S4EB-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, ×107
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: S4EB-24V, 4 Form A 4.-(2) Coil temperature rise
Tested Sample: S4EB-24V, 4 Form A 5. Operate and release time
(Single side stable type)
Tested Sample: S4EB-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 leav e at least 10 mm
.394 inch between relays in order to achieve the performance
listed in the catalog.
7. Thermal electromotive force
200
246810 12
100
Minute
NR-H
NF relay S relay
Thermal electromotive force, µV
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
Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
S
ASCTB207E 201202-T
DIMENSIONS (mm inch)
SAFETY STANDARDS
NOTES
For Cautions for Use.
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, 1/20HP 125V AC, 1/20HP 250V AC
3A 30V DC
The CAD data of the products with a CAD Data mark can be downloaded from: http://industrial.panasonic.com/ac/e/
External dimensions
General tolerance: ±0.3 ±.012
PC board pattern (Copper-side view)
Tolerance: ±0.1 ±.004
10±0.5
12
7.62
123456
12 11 10 9 8 7
3
1
40.4
1.4 1.0
5.08
0.5
0.5
7.62
28±0.5 12
.118
.394±0.02
.472
.300
.039
.157 .016
.055 .039
.200
.020
.020
.300
1.102±0.02 .472
2.54
2.54
12-1.3 dia.
.100
.100
.047-.051 dia.
Schematic (Bottom view)
Single side stable
(Deenergized position) 2 coil latching
(Reset condition)
2a2b
3a1b
4a
123456
12 11 10 9 8 7
-
+
123456
12 11 10 9 8 7
-
+
-
+
123456
12 11 10 9 8 7
-
+
-
+
123456
12 11 10 9 8 7
-
+
123456
12 11 10 9 8 7
-
+
-
+
123456
12 11 10 9 8 7
-
+
CAD Data
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. 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
25
3
10 9
4
8
11
5
23
98
11 10
•
•
Between 2, 3 and 4, 5:
different channels, therefore not possible
Between 10, 11 and 8, 9:
different channels, therefore not possible
•
•
Between 2, 3 and 4, 5:
same channels, therefore possible
Between 10, 11 and 8, 9:
same channels, therefore possible
No good Good
