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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
20 A 12 V DC Max. 75% V of
Rated coil
voltage
(Initial)
Min. 4.17% V of
Rated coil
voltage
(Initial)
327 mA 36.7 Ω 3.9 W 133% V of
rated coil
voltage
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

* square, pulse driver

Note) When using a DC power supply, use one that provides a current capacity leeway of at least 150% of the rated operating current.

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Specifications

Item Specifications
20 A type 80 A type
Contact
data
Contact arrangement 1 Form A
Contact material Copper alloy Tungsten type
and Copper alloy
Contact rating
(resistive)
20 A 400 V DC 80 A 400 V DC
Max. switching power
(resistive)
20,000 W 80,000 W
Max. switching voltage 1,000 V DC
Max. cut-off current - 800 A 300 V DC
(1 cycle) *3
Overload cut-off 60 A 400 V DC (Min. 50 cycles) *3 120 A 400 V DC (Min. 50 cycles) *3
Reverse cut-off -20 A 200 V DC (Min. 100 cycles) *3 -80 A 200 V DC (Min. 1,000 cycles) *3
Max. switching current 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)
Min. switching load
(reference value) *1
1 A 12 V DC 1 A 12 V DC
Contact voltage drop
(Initial)
Max. 0.2 V
(When carrying current is 20 A)
Max. 0.067 V
(When carrying current is 20 A)
Insulation resistance (initial) Min. 100 MΩ
(at 500 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 *4 - 50 to 100% V (at 80°C)
Time
characteristic
(initial)
Operate time Max. 50 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)
Shock
resistance
Functional For ON: 196 m/s2 (half-sine shock pulse: 11 ms, detection time: 10 µs)
For OFF: 98 m/s2 (half-sine shock pulse: 11 ms, detection time: 10 µs)
Destructive 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. 200 x 103 ope.
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. 180 g Approx. 400 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.
*4Coil holding voltage is the coil voltage after 100 ms from the applied rated coil voltage.

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Expected electrical life *1

Conditions: Resistive load

Type Switching capacity Number of operations
20 A 10 A 1,000 V DC Min. 103 ope. (switching frequency: 6 times/min) *2
20 A 400 V DC Min. 3 x 103 ope. (switching frequency: 6 times/min) *2
80 A 80 A 400 V DC Min. 103 ope. (switching frequency: 20 times/min) *2
*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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