Business > Industrial Devices > Automation Controls Top > Components & Devices > Relays / Couplers > High-capacity DC Cutoff Relay > EP Relays > Rating/Performance
Partly to Be Discontinued
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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 |
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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.
Item | Specifications | ||
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20 A type | 80 A type | ||
Contact data |
Contact arrangement | 1 Form A | |
Contact material | Copper alloy | Tungsten type and Copper alloy |
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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 |
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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) |
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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) |
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Insulation resistance (initial) | Min. 100 MΩ (at 500 V DC, Measured portion is the same as the case of dielectric strength.) |
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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) |
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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) |
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Unit weight | Approx. 180 g | Approx. 400 g |
*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. |
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*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. |
*3 | Conditions: Varistor used for coil surge absorption. Note) if a diode is used the life will be lower. |
*4 | Coil holding voltage is the coil voltage after 100 ms from the applied rated coil voltage. |
Conditions: Resistive load
Type | Switching capacity | Number of operations |
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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 |
*1 | Please refer to the reference data for switching and cut-off at 400 V DC and higher. |
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*2 | Conditions: Varistor used for coil surge absorption. Note) if a diode is used the life will be lower. |
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