DATA SHEE T
AUTOMOTIVE RELAYS
EP2S/EP1S SERIES
LOW SOUND PRESSURE
DESCRIPTION
The NEC EP2S / EP1S series are PC-board mount type automotive relays suitable for various motor controls
and other applications that require a high level of quality and performance.
The sound pressure level of EP2S / EP1S series is 57 dBA nominal when the relay operates, and 49 dBA
nominal when the relay releases.
FEATURES
™
Less sound pressure (–10 dB at “operate” and –3 dB at “release” compared with EP2 / EP1)
™
For motor and solenoid reversible control
™
High performance and productivity by unique structure
™
Flux tight housing
APPLICATION
™
Power window control
™
Electrical door lock
™
Wiper system
EP2S SERIES
EP1S SERIES
Document No. ER0131EJ1V0DS00
Date Published April 1996 M
Printed in Japan
©
1996
EP2S / EP1S SERIES
SCHEMATIC (BOTTOM VIEW)
EP2S SERIES
2
4
1
3 9
4
1
EP1S SERIES
2
3
4
2
1
3
8
5 6
7
10
5 6
7
8
5
[Unit A]
[Unit B]
[Unit A]
[Unit B]
[H Bridge Type]
[Separate Type]
DIMENSIONS mm (inch)
EP2S SERIES
H Bridge Type
Vent hole
JAPAN
Separate Type
Separate type
discrimination mark
Vent hole
JAPAN
φ
2(0.079)
Date code
Part number
Part number
EP2S-3L1
0G3 24
Date code
EP2S-3L1T
0G3
24
23.8 + 0.5
–
(0.94)
0.5(0.02)
16.0 + 0.5
–
(0.63)
16.2 + 0.5
–
(0.64)
23.8 + 0.5
–
(0.94)
0.5(0.02)
16.0 + 0.5
–
16.2 + 0.5
–
(0.64)
3.5
(0.14)
3.5
10.1
8.0
5.45 (0.21)
(0.21)
(0.4)
(0.31)
3.5
(0.14)
(0.32) (0.32)
10.1
8.0
5.45 (0.21)
(0.4)
(0.31)
3.5
(0.14)
2-0.5×1.1(0.02×0.04)
3.1 (0.12)
4 -0.5×1.1(0.02×0.04)
2.2
(0.09)
3.1
(0.12)
5.45 (0.21)
6.4 (0.25)
5.45 (0.09)
(0.21)
6.4 (0.25)
(0.14)
(0.63)
2.2
(0.09)
3.1
(0.12)
2.2
(0.09)
(0.14) 3.5
(0.31)
(0.4)
11.9
∗
(0.47)
8.0
10.1
11.9
∗
(0.47)
2-1.3×1.3(0.05×0.05)
4-
φ
0.6(
φ
0.22)
∗
for reference
(0.14) 3.5
(0.31)
(0.4)
11.9
∗
(0.47)
8.0
10.1
11.9
∗
(0.47)
2 -1.3×1.3(0.05×0.05)
4-
φ
0.6(
φ
0.22)
∗
for reference
2
(0.32) (0.32)
8.1
∗
8.1
∗
8.1
∗
8.1
∗
2.2
6.4
EP2S / EP1S SERIES
EP1S SERIES
JAPAN
Vent hole
Date code
Part number
EP1S-B3G1
4A 1 22
14.6 + 0.5
–
(0.58)
16.2 + 0.5
–
(0.63)
16.0 + 0.5
–
3.5
0.5(0.02)
10.1(0.4)
8.0(0.31)
2-
φ
0.6
(
φ
0.02)
3.5
(0.14)
3.1 (0.12)
(0.21)
2.2
(0.09)
5.45
(0.25)
6.4
2.65
∗
(0.1)
(0.14)
(0.63)
1.3×1.3
(1.5×1.5)
2-0.5×1.1
(0.02×0.02)
∗
for reference
PCB PAD LAYOUT mm (inch) (BOTTOM VIEW)
EP2S SERIES
4 -
φ
1.1
+0.1
(
φ
0.043)
–0
2 -
φ
1.5
+0.1
(
φ
0.059)
–0
4 -
φ
1.1
+0.1
(
φ
0.043)
–0
4 -
φ
1.5
+0.1
(
φ
0.059)
–0
EP1S SERIES
2 -
φ
1.1
+0.1
–0
(
φ
0.043)
2 -
φ
1.5
+0.1
–0
φ
0.059)
(
φ
1.9
+0.1
–0
(
φ
0.075)
2 -
φ
1.9
+0.1
(
φ
0.075)
–0
[H Bridge Type]
[Separate Type]
2 -
φ
1.9
+0.1
(
φ
0.075)
–0
3
EP2S / EP1S SERIES
SPECIFICATIONS
Items
Contact Form
Contact Material
Contact Resistance
Contact Switching Voltage
Contact Switching Current
EP2S
1 form C×2 (H bridge type and separate type) 1 form C
Silver oxide complex alloy
50 mΩ max. (measured at 7 A) initial
16 Vdc max.
25 A max.
20 A / regular type
(2 minutes max. 12 Vdc at 85˚C)
25 A / high carrying current type
(2 minutes max. 12 Vdc at 85˚C)
25 A / regular type
(2 minutes max. 12 Vdc at 85˚C)
30 A / high carrying current type
(2 minutes max. 12 Vdc at 85˚C)
EP1S
at 25 ˚C (77 ˚F)
Contact Carrying Current
Operate Time
Release Time
Normal Operate Power
Insulation Resistance
Breakdown Voltage
Shock Resistance
Vibration Resistance
Ambient Temperature
Coil Temperature Rise
Mechanical
G
Electrical
Approx. 5 ms (at 12 Vdc excluding bounce) initial
Approx. 2 ms (at 12 Vdc excluding bounce) initial
0.64 W (at 12 Vdc)
100 MΩ min. (at 500 Vdc) initial
500 Vdc min. (for 1 minute) initial
98 m / s
2
[Approx. 10 G] min. (misoperating)
10 to 300 Hz, 43 m / s
2
[Approx. 4.4 G] min. (misoperating)
–40˚C to +85˚C (–40 ˚F to +185˚F)
50 ˚C / W (without contact carrying current)
1×10
6
operations
Contact 1×10
5
operations (at 14 Vdc, Motor Load 25 A / 7 A)
Life Expectancy
Contact 1×10
5
operations (at 14 Vdc, Motor Load 20 A / 3 A)
L or N
Weight
Approx. 15 gr
Approx. 8 gr
SOUND PRESSURE LEVEL (for reference)
Sound Pressure level Fast (F)
∗
Operate (at 12 Vdc drive with diode)
Relese (at 12 Vdc drive with diode)
57 dBA nominal
49 dBA nominal
∗
Refer to the measuring condition in the figure of
sound pressure level distribution on page 7.
4
EP2S / EP1S SERIES
COIL RATING
EP2S SERIES
Part Number
H Bridge Type
EP2S-3L1
EP2S-3L2
EP2S-3L3
EP2S-4L3
EP2S-4L4
EP2S-4L5
Separate Type
EP2S-3L1T
EP2S-3L2T
EP2S-3L3T
EP2S-4L3T
EP2S-4L4T
EP2S-4L5T
Nominal
Voltage
(Vdc)
12
12
12
12
12
12
Coil
Resistance
(Ω
±10
%)
225
225
225
300
300
300
Must
Operate Voltage
(Vdc max.)
6.5
7.0
7.5
7.5
8.0
8.5
Must
Release Voltage
(Vdc min.)
0.9
0.9
0.9
0.9
0.9
0.9
at 25 ˚C (77 ˚F)
Nominal
Operate Power
(W)
0.64
0.64
0.64
0.48
0.48
0.48
∗
High carrying current type available
EP1S SERIES
Part Number
Regular Type
EP1S-3L1
EP1S-3L2
EP1S-3L3
EP1S-4L3
EP1S-4L4
EP1S-4L5
High Carrying
Current Type
EP1S-B3G1
EP1S-B3G2
EP1S-B3G3
EP1S-B4G3
EP1S-B4G4
EP1S-B4G5
Nominal
Voltage
(Vdc)
12
12
12
12
12
12
Coil
Resistance
(Ω
±10
%)
225
225
225
300
300
300
Must
Operate Voltage
(Vdc max.)
6.5
7.0
7.5
7.5
8.0
8.5
Must
Release Voltage
(Vdc min.)
0.9
0.9
0.9
0.9
0.9
0.9
Nominal
Operate Power
(W)
0.64
0.64
0.64
0.48
0.48
0.48
5
