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EP1 Series

Features | Specifications | Coil Rating | Dimensions | PCB Pad Layout | Schematics | Part Number System

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EP1 Series Data

Features

The EP1 is available with a high temperature option (125° C ambient), or as a quiet type.

The NEC EP1 series relay is a PC-Mount, high density, single 1 Form C (SPDT) relay, which is essentially half of the EP2. Like the EP2, it is intended for automotive loads up to 25A.
  • Flux tight housing
  • Low profile
  • Two types of contact by carrying current capacity (Standard type: 25 A maximum, high current type: 30 A maximum)


Specifications

Types (Contact Rating) EP1-
(Standard)
EP1-B
(High Current)
Contact Form 1 form C
Contact Material Silver oxide complex alloy (Special type available)
Contact Resistance
10 mOhm typ./50 mOhm max. (measured at 7A) initial
Contact Switching Voltage 16 Vdc, maximum
Contact Switching Current
25 A maximum (at 16 Vdc)
Contact Carrying Current 25 A maximum (1 hour maximum),
30 A maximum (2 minutes maximum) at 12 Vdc
30 A maximum (1 hour maximum),
35 A maximum (2 minutes maximum) at 12 Vdc
Operate Time (Excluding bounce) Approximately 5 ms (at 12 Vdc) initial
Release Time (Excluding bounce) Approximately 2 ms (at 12 Vdc) initial, without diode
Nominal Operate Power 0.48 W/0.64 W (at 12 Vdc)
Insulation Resistance
100 MOhm at 500 Vdc, initial
Breakdown Voltage
500 Vdc (for one minute), initial
Shock Resistance 98 m/s2 (10 G) (misoperating)
980 m/s2 (100G) (destructive failure)  
Vibration Resistance 10 to 300 Hz, 43 m/s2 (4.4 G) (misoperating)
10 to 500 Hz, 43 m/s2 (4.4 G), 200 hours (destructive failure)
Ambient Temperature -40 to +85° C (-40 to +185° F)
Coil Temperature Rise
50° C / W (122° F/W) (Contact Carrying Current: 0 A)
Life Expectancy Mechanical 1 x 106 operations
Electrical (at maximum load) 100 x 103 operations (at 14 Vdc, Motor Load 20 A/3 A)
Weight Approximately 8 g (0.28 oz)


Coil Rating

at 25° C (77° F)

Part Numbers
Nominal
Voltage
(Vdc)
Coil
Resistance
(Ohm) ±10%
Nominal
Current
(mA)
Must Operate
Voltage
(Vdc maximum)
Must Release
Voltage
(Vdc minimum)
Nominal
Operate Power
(W)
  EP1-3N1   12 225 53.3 6.5 0.9 0.64

* Note 1 - Other coil resistances and voltages available upon request.


Dimensions

mm (inch)


PCB Pad Layout

(bottom view) mm (inch)


Schematics

(bottom view)


Part Number System

EP1
1
F
2
- B
3
3
4
N
5
1
6
S
7
1 Relay series
2 Maximum ambient temperature
Blank: 85° C
F: 125° C
3 Carrying current capacity
Blank: Standard type
B: High current type
4 Coil resistance (at 20° C)
3: 225 Ohm ± 10%
* See Note 1 above
5 Contact material
L: Silver oxide complex alloy type I
N: Silver oxide complex alloy type II
6 Operate voltage (at 20° C)
1: 6.5 V maximum
* See Note 1 above
7 Enclosure
Blank: Unsealed
S: Sealed

EP1 Series Data

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Last updated: 6-7-99