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Larry M
User Rank
Platinum
Re: Relay vs. Contactor
Larry M   4/25/2012 11:10:43 AM
NO RATINGS
GlennA wrote "There is a difference."

Not really. That's like saying that all lamps over 300 watts are to be called lamps and those less than 300 watts are to be called light bulbs. A difference between control voltage and switching voltage isn't really a discriminator either.

Is the "condenser" in the ignition of your pre-1980s car not a capacitor, just because the auto mechanic calls it by that name?

Larry

TJ McDermott
User Rank
Blogger
Re: Relay vs. Contactor
TJ McDermott   4/25/2012 9:58:21 AM
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Boy, this story sounds a lot like the Maytag stories we've heard this year.

GlennA
User Rank
Gold
Relay vs. Contactor
GlennA   4/25/2012 9:23:34 AM
NO RATINGS
There is a difference.  Contactors are usually used when driving motors.  They have a higher voltage rating to prevent arc-over when stopping a motor.  Relays are often used in control circuits and have lower voltage ratings.  N.B. There is a voltage rating for the coil that pulls-in the contacts, and a different voltage / current rating for the contacts that drive the load..

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