Easy-to-understand explanations of the unknowns when using high-capacity power relays

OMRON relays are used in a wide variety of products by our customers, and there are a wide range of design considerations, such as the counter electromotive voltage of coils, holding voltage, and the effects of magnetic fields when DC relays are used. To help you use OMRON relays more comfortably and easily, this page provides easy-to-understand explanations of the most frequently asked questions.



How can I prevent reverse voltage in coils?


How can coil power consumption be reduced?

What types of holding voltage application circuits are recommended?

Tell me the mechanism that interrupts the arc.


What is the effect of the magnetic field from permanent magnets in a relay?


Can DC power relays be used with less than 1A?

Can two relays be connected in series or parallel?

What happens to a relay when a large current (short-circuit current) is energized?

What is the contact resistance capability of high-capacity power relays?


Product category

High Capacity Power Relays


Power Relays over 2 Amps are electromechanical devices that turns a large load on or off through the use of a smaller control signal. The contacts on these devices have a rating of 2 A, 3A, 3.5A, 4A, 5A, 6A, 7A, 7.5A, 8A, 8.5A, 9A, 10A, 11A, 12A, 14A, 15A, 16A, 18A, 20A, 21A, 23A, 25A, 26A, 30A, 31A, 32A, 33A, 35A, 40A, 48A, 50A ,60A, 90A, 100A, 120A, 150A, 200A, 400A, 750A and possibly others.

Related keywords

Tactile Switch
Small Reel
Rell With 100 pcs.
Prototype for Mounting


Please visit the link below to see this product category on the Digi-Key website
Relays | Power Relays, Over 2 Amps

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Technical professionals provide easy-to-understand explanations of the unknowns when using high-capacity power relays. | OMRON Device & Module Solutions - Americas