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EP Relays

Coil data

  • Operating characteristics such as ‘Operate voltage’ and ‘Release voltage’ are influenced by mounting conditions, ambient temperature, etc.
    Therefore, please use the relay within ± 5% of rated coil voltage.
  • ‘Initial’ means the condition of products at the time of delivery.
Type Rated coil voltage Operate voltage*
(at 20°C)
Release voltage*
(at 20°C)
Rated operating current
(±10%, at 20°C)
Coil resistance
(±10%, at 20°C)
Rated operating
power
Max. allowable voltage
10 A 12 V DC Max. 75% V of Rated coil voltage (Initial) Min. 8.3% V of Rated coil voltage (Initial) 103 mA 116 Ω 1.24 W 133% V of rated coil voltage
24 V DC 52 mA 464 Ω
48 V DC 26 mA 1,858 Ω
100 V DC 12 mA 8,065 Ω
20 A 12 V DC Min. 4.17% V of Rated coil voltage (Initial) 327 mA 36.7 Ω 3.9 W
24 V DC 163 mA 146.8 Ω
80 A 12 V DC Min. 8.3% V of Rated coil voltage (Initial) 353 mA 34 Ω 4.2 W
24 V DC 176 mA 136 Ω
200 A 12 V DC 500 mA 24 Ω 6 W
24 V DC 250 mA 96 Ω
300 A 12 V DC Min. 16.7% V of Rated coil voltage (Initial) 3,300 mA - When input:
Max. 40 W (0.1 s from time of input)
When retained:
Max. 4 W
24 V DC 1,850 mA When input:
Max. 45 W (0.1 s from time of input)
When retained:
Max. 4 W

*square, pulse driver

*1When using a DC power supply, use one that provides a current capacity leeway of at least 150% of the nominal coil current.
*2The 300 A type has a built-in coil current switching circuit. After the nominal coil voltage is applied, it automatically switches in approximately 0.1 seconds.

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Specifications

Item Specifications
10 A type 20 A type 80 A type 200 A type 300 A type
Contact data Contact arrangement 1 Form A
Contact material Molybdenum type Copper alloy Tungsten type and Copper alloy Copper alloy Copper alloy
Contact rating (resistive) 10 A 400 V DC 20 A 400 V DC 80 A 400 V DC 200 A 400 V DC 300 A 400 V DC
Max. switching power (resistive) 10,000 W 20,000 W 80,000 W 200,000 W 300,000 W
Max. switching voltage 1,000 V DC
Max. cut-off current - - 800 A 300 V DC
(1 cycle) *3
2,000 A 350 V DC
(1 cycle) *3
2,500 A 300 V DC
(3 cycles) *4
Overload cut-off 30 A 400 V DC
(Min. 50 cycles) *3
60 A 400 V DC
(Min. 50 cycles) *3
120 A 400 V DC
(Min. 50 cycles) *3
- 600 A 400 V DC
(Min. 300 cycles)
Reverse cut-off -20 A 200 V DC
(Min. 10 cycles) *3
-20 A 200 V DC
(Min. 100 cycles) *3
-80 A 200 V DC
(Min. 1,000 cycles) *3
-200 A 200 V DC
(Min. 1,000 cycles) *3
-300 A 200 V DC
(Min. 100 cycles)
Max. switching current 10 A DC
continuity
(2 mm2 Wire)
15 A DC
3 min
(2 mm2 Wire)
30 A DC
30 s
(2 mm2 Wire)
20 A DC
continuity
(3 mm2 Wire)
40 A DC
10 min
(3 mm2 Wire)
60 A DC
1 min
(3 mm2 Wire)
80 A DC
continuity
(15 mm2 Wire)
120 A DC
15 min
(15 mm2 Wire)
180 A DC
2 min
(15 mm2 Wire)
Max. 200 A DC
continuity
(60 mm2 Wire)
300 A DC
15 min
(60 mm2 Wire)
300 A DC
continuity
(100 mm2 Wire)
400 A DC
10 min
(100 mm2 Wire)
600 A DC
1 min
(100 mm2 Wire)
Min. switching load (reference value) *1 1 A 6 V DC 1 A 12 V DC 1 A 12 V DC 1 A 12 V DC 1 A 24 V DC
Contact voltage drop (Initial) Max. 0.5 V
(When carrying
current is 10 A)
Max. 0.2 V
(By voltage drop
6 V DC 20 A)
Max. 0.067 V
(By voltage drop
6 V DC 20 A)
Max. 0.1 V
(When carrying
current is 200 A)
Max. 0.06 V
(When carrying
current is 300 A)
Insulation resistance (initial) Min. 100 MΩ (at 1,000 V DC, Measured portion is the same as the case of dielectric strength.)
Dielectric strength (initial) Between open contacts 2,500 Vrms for 1 min. (detection current: 10 mA)
Between contact and coil 2,500 Vrms for 1 min. (detection current: 10 mA)
Coil holding voltage *5 - - 50 to 100% V (at 80°C) 50 to 100% V (at 80°C) (Automatic switching)
Time characteristic (initial) Operate time Max. 50 ms at rated coil voltage (at 20°C, without bounce) Max. 30 ms at rated coil voltage (at 20°C, without bounce)
Release time Max. 30 ms at rated coil voltage (at 20°C, without bounce, without diode) Max. 10 ms at rated coil voltage (at 20°C)
Shock resistance Functional 10 A, 20 A (ON), 80 A (ON), 200 A (ON), 300 A (ON):
Min. 196 m/s2 (half-sine shock pulse: 11 ms, detection time: 10 μs)
20 A (OFF), 80 A (OFF), 200 A (OFF), 300 A (OFF):
Min. 98 m/s2 (half-sine shock pulse: 11 ms, detection time: 10 μs)
Destructive Min. 490 m/s2 (half-sine shock pulse: 6 ms)
Vibration resistance Functional 10 to 200 Hz acceleration 43 m/s2 constant (detection time: 10 μs)
Destructive 10 to 200 Hz acceleration 43 m/s2 constant (3 directions, each 4 hours)
Expected life Mechanical life Min. 105 Min. 2 x 105
Conditions Conditions for usage,
transport and storage *2
Ambient temperature: -40 to +80°C (storage: Max. +85°C),
Humidity: 5 to 85% RH (Avoid icing and condensation)
Unit weight Approx. 80 g Approx. 180 g Approx. 400 g Approx. 600 g Approx. 750 g
*1This 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.
*2The 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.
*3Conditions: Varistor used for coil surge absorption. Note: if a diode is used the life will be lower.
*4Conditions: Switches rated number of 10 cycles each time there is a 2,500 A cut-off.
*5Coil holding voltage is the coil voltage after 100 ms from the applied rated coil voltage.

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Expected electrical life

Conditions: Resistive load

Type Switching capacity Number of operations
10A 10 A 400 V DC Min. 7.5 x 104 ope. (switching frequency: 20 times/min)*
20A 10 A 1,000 V DC Min. 1,000 ope. (switching frequency: 6 times/min)*
20 A 400 V DC Min. 3,000 ope. (switching frequency: 6 times/min)*
80 A 80 A 400 V DC Min. 1,000 ope. (switching frequency: 20 times/min)*
200 A 60 A 1,000 V DC Min. 1,000 ope. (switching frequency: 6 times/min)*
200 A 400 V DC Min. 3,000 ope. (switching frequency: 20 times/min)
300 A 300 A 400 V DC Min. 1,000 ope. (switching frequency: 6 times/min)
*1Please refer to the reference data for switching and cut-off at 400 V DC and higher.
*2Conditions: Varistor used for coil surge absorption.
Note: if a diode is used the life will be lower.

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