What is a Automotive Relays?

Automotive Relay Definition

Automotive relays are provided in a design, production and quality structure that complies with the quality assurance system specified by each manufacturer, considering being installed in vehicles.

About Automotive relays

Automotive Relay Features

There are plug-in types that are directly attached to a vehicle such as an engine room, and printed circuit boards type that are mounted on a unit manufacturer's board.

Plug-in relay

Plug-in relay

Replaceable relays of the type having tab terminals for direct attachment to a vehicle connector or relay BOX.

Relay for printed circuit boards

Relay for printed circuit boards

It is of the type mounted on the printed circuit board of the unit manufacturer, and once mounted, it is not possible to replace the relay alone.

Automotive Relay Types

In order to cope with a variety of applications installed in vehicles, we have lined up of several external shapes and specifications suitable for each application.

Omron's Automotive relays


Plug-in relay

  • Lineup of products, mainly ISO types
  • Lineup of small plug-in types specialized for specific applications

PCB Relay

  • Line-up of more compact products which are different from H-Bridge type which can normally and reversely control motor.
  • Line up PCB relays that can replace plug-in relays

Automotive Relay Diagram

Single type There are two types of contact structures, SPST and SPDT.
Twin type This is a relay with a reduced number of mounting steps by using a single relay in a single package.
H-Bridge types The two SPDT single relays are packaged in one package, and the N.O. terminals and the N.C. terminals of the two single relays are shared, so that the relay is suitable for motor drive circuits.

Single type

Twin type

H-Bridge types

Automotive Relay Application Examples

Application for Plug-in


Application for PCB


Note for sale of Automotive relays and using catalogue

  1. Selling for car makers and companies related to Automotive

    Omron and car makers or companies related to automotive confirm relay specifications and actual using condition to use relays safely. Tests are included when necessary.
    Omron can not sell or guarantee our automotive relays when we have not finished making contracts with Product Specification.

  2. Selling for NO car makers or companies NOT related to automotive, and individual customers

    Basically, Omron can not sell our automotive relays for NO car maker or companies NOT related to automotive.
    Omron basically can not support for individual customers.

  3. Safety Precautions for All Automotive Relays

    When you consider using our automotive relays or see our catalogue, please confirm our Safety Precautions for All Automotive Relays in advance.