HRD-220B Dong-A Thermal overload relay

HRD-180B Dong-A Over Load Relay (125-155-185A)


Thermal overload relay is safely protected from any damage of overload, constraint or open-phase operation of motor.

(However, to protect from the motor from any damage due to open phase, “Overload Relay for Open Phase Protection” is recommended.)

Over Load Relay

Brand: Dong-A

Model: HRD-180B

Ampere Range: 125-155-185A

Phase: TP

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