Contactor vs Relay: What's the Difference?

Thread starter Stanley_Smith
Start date Jan 22, 2005
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Contactor Relay

AI Thread Summary

A contactor is essentially a type of relay designed to handle higher current loads, typically above 15 amps, making it suitable for industrial applications. In contrast, relays are used for lower power applications and can control smaller loads. When choosing a contactor, factors such as voltage rating, current capacity, and the type of load (inductive or resistive) should be considered. Additionally, the operational environment and required lifespan can influence the selection process. Understanding these differences is crucial for effective electrical system design.

Jan 22, 2005

Stanley_Smith

I don't see the difference between a contactor and a relay. Can anybody tell me what the difference is, when to use a relay over a contactor ?
What are some criterias that need to be taken into consideration when choosing a contactor ?

Thanks,

Thanks,

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Jan 23, 2005

willib

it looks like a contactor is a relay capable of large amt. of amps..
http://www.surplussales.com/Relays/REcontacts.html

Last edited by a moderator: May 1, 2017

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