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What is a DC Power Relay?

DC Power Relay Definition

About DC Power Relays

This is a relay that performs high-voltage and high-capacity urgent shutdown of DC circuits.
These relays not only energize DC circuit but also shutdown the high voltage circuit at high speed when an error occurs.

DC Power Relay Features

Omron's DC power switching technique contributes to space saving, noise reduction, miniaturization, and power saving, and is characterized by a safety and reliability design.

Omron's DC Power Relays

DC Power Relay Types

Omron's DC power relays meet the diverse needs with a wide range of products of small size and high capacity.


G9EJ Rating: 400 V 25A (C-load)


G9EA Rating: 400 V 80A


G9EC Rating: 400 V 200A

DC Power Relay Diagram

The switching structure using a gas sealing system has greatly reduces the size of the relay switching area and operation noise during load switching. In addition, this structure realized reduction of coil power consumption and long-term contact stability.

Main components main terminals, fixed contacts, contact springs, permanent magnets, movable contacts

Arc stretching effect

DC Power Relay Application Examples

Fuel cell cogeneration system and photovoltaic power generation system

Application For power feeding circuit, and safety circuit of capacitors
photovoltaic power generation system

photovoltaic power generation system

Industrial equipment

elevators, industrial robots, test equipment, etc.

Application For safety circuits
industrial robots

industrial robots

Electric vehicles and plug-in hybrid vehicles

Application Charging and power feeder and auxiliary devices
Electric vehicles

Electric vehicles

Environmentally friendly vehicles with high-voltage batteries typified by hybrid vehicles and electric vehicles

Application Main relay, precharge relay (inside BDU)
hybrid vehicles

hybrid vehicles