[Moved] difference between contactor and relay

[raman00084]

what is the main difference between relay and contactor both do the same job. both are available in high current ratings for example 60amps relay and contactor both are available the what is the difference.

 

[KhaledOsmani]

A relay is a device that can be classified as electrically operated control switches and relays are either power relays or control relays depending upon their use. While power relays are called contactors, control relays are simply called relays.

When a relay is used to switch a large amount of electrical power through its circuits, it is given a new name, a Contactor.

 

[dick_freebird]

One difference is simply who you're selling to - plant engineers
will be looking for contactors and board / box engineers, relays.

The other, generically, is capacity. You are not going to find a
500mA "contactor" or a 200A "relay" very commonly; the
middle-ground example you choose, avoids areas where the
(nomenclature) distinction is plainest.