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Thread: relay search

  1. #1
    Join Date
    Aug 2015
    Location
    Texas
    Posts
    104

    relay search

    I'm looking for a relay with the following requirements:

    120v contacts
    Coil voltage <=12v AC or DC
    Coil Amperage .5 amp max (less is preferable)
    on a board with terminals or wire leads

    I am currently switching an incandescent lamp with a solid state relay with the relay being controlled by a reed switch.

    The reason for a new relay is that I would like to switch out the incandescent lamp for a new led fixture but know that my current relay's leakage current will not likely behave with anything but a resistive load.

    Any thoughts or ideas?

  2. #2
    Join Date
    Apr 2008
    Location
    Ann Arbor, Michigan
    Posts
    6,522
    171225-2521 EST

    A KUP will probably work see:
    https://www.alliedelec.com/m/d/5e1ec...17750ee765.pdf

    Sockets with screw terminals are available.

    Use silver-cd-oxide contacts. Use three pole and parallel all three poles. Use the 12 V DC version with a reverse biased snubbing diode across the coil.

    .

  3. #3
    Join Date
    Aug 2015
    Location
    Texas
    Posts
    104
    Quote Originally Posted by gar View Post
    171225-2521 EST

    A KUP will probably work see:
    https://www.alliedelec.com/m/d/5e1ec...17750ee765.pdf

    Sockets with screw terminals are available.

    Use silver-cd-oxide contacts. Use three pole and parallel all three poles. Use the 12 V DC version with a reverse biased snubbing diode across the coil.

    .
    That looks great. Any idea if it’s cheaper from ebay, amazon, or supply house?
    Any particular diode for snubbing or a standard 1N4007?

  4. #4
    Join Date
    Apr 2008
    Location
    Ann Arbor, Michigan
    Posts
    6,522
    171225-2522 EST

    I don't know about cost vs sources. You want a relay that has its contact rating as 10 A. The pure silver contacts are rated at 5 A, and you do not want gold contacts at 120 V AC.

    At 12 V you don't need more than a 1N4001, but any higher inverse rating is fine.

    .

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