Three-phase relay-GRT508G-120A


-120A three sets of contacts switching capability.
-Only impulse excitation needed, both for single and double coil.
-Low power consumption, small in size
-Custom assemblies available with flexible wire and/or copper straps,and/or with integrated shunt
-4KV dielectric strength between coil and contacts
-RoHS compliant
-IEC62055-31 UC3 compliant
-Outline dimensions: (103 x 46.5 x 41.7) mm

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Three-phase relay-GRT508G-120A Details

Contact Data

Contact Form 3B
Contact Material AgSnO₂
Contact Resistance Max. 1.0mΩ (1A 6VDC)
Rated Load(Resistive) 120A 250VAC
Max. Switching Voltage 380VAC
Max. Switching Current 120A
Max. Switching Power 30000VA
Service Life Mechnical Endurance 2x105 OPS
Electrical Endurance 1x10OPS
Max. Short-circuit Current 3000A/10ms
6000A/10ms (no explosion)




Operate Time 60ms Max.
Release Time 60ms Max.
Insulation Resistance (500VDC) 1000MΩ Min.
Dielectric Strength (50/60hz,1 min) Contact to Coil 4000VAC
Across Open Contacts 2000VAC
Contact to contact 4000VAC
Surge Voltage (1 .2/50 μ s) Contact to Coil 20KVAC
Creepage Distance 8mm
Unit Weight About 350g


Environmental Data


Ambient Temperature -40℃一+70℃ Relative Humidity 5%-85% RH
Vibration 10-55Hz 1.5mm Shock 98m/s²


Coil Data (20℃)


Coil Voltage (VDC) Coil Resistance (Ω)±10% Coil Power (W) Operating Voltage (VDC) Releasing Voltage (VDC) Allowing Voltage (VDC) Pulse Duration (ms)
Single Double Single Double
□9 10.1 5.1/5.1 8.0 16.0 ≤6.3 ≤6.3 13.5 ≥180
□12 18 9/9 ≤8.4 ≤8.4 18
□24 72 36/36 ≤16.8 ≤16.8 36
□48 288 144/144 ≤33.6 ≤33.6 72

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