Omron G5G-1A-DT1 Power Relay

Discussion in 'Highly Technical' started by IEC, May 20, 2009.

  1. IEC

    IEC Lifer

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  2. PottedMeat

    PottedMeat Lifer

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  3. Modelworks

    Modelworks Lifer

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  4. Howard

    Howard Lifer

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    You need its functionality, or are you looking for an exact replacement?
     
  5. Idoughno

    Idoughno Junior Member

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    I am in need of the same and I’d be happy for a substitute, I cannot find one of these things anywhere. I would appreciate any help.
     
  6. Mark R

    Mark R Diamond Member

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    Is this close enough?

    Link

    It's not quite the same shape though - it's about 5 mm too long. So check that the pins would fit the PCB.
     
    #6 Mark R, Jun 24, 2010
    Last edited: Jun 24, 2010
  7. Idoughno

    Idoughno Junior Member

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    Yeah the pins are not within the same specs, plus like you said, the body is too long to fit the circuit board. Thanks though, I’m still in need if anyone can help, I’d be very grateful, Dean
     
  8. William Gaatjes

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    I found something similar here :

    http://www.fixya.com/support/t998935-microwave_power_relay

    I looked at the data sheet, the relay is specially made for switching transformers in microwave ovens. I think this is the case because of the high voltage sparks the contacts can handle.

    But i looked at the website of omron as well.

    It seems the model you have may no longer be manufactured. I had in the past some experience with Omron and the company i worked for had some serious quality issues with omron relays in the past. Perhaps the G5G had some quality issues as well and was later superseded by a better and improved design. And marketed as a cheaper process :) .

    I think that as long as you have an relay with a contact that closes when the relay is powered, and the contacts can handle at least the same the power switching requirements and the coil voltage is the same you can use the relay. I think the best and cheapest way would be to just salvage an old magnetron oven that still works. The basic function of all these machines are the same. The user interface is just different. For example buy a second hand magnetron on ebay and use it for parts.

    One of these might very well do the trick.

    http://www.ecb-web.co.jp/ecb_en/products/search/index.php?l=dry&s=3

    This may be the best choice relay from omron, you need to do some modifying though...

    http://www.omron.com/ecb/products/dry/3/g9eb-1.html

    available at mouser but the price is insane, maybe it is wrong :
    http://nl.mouser.com/ProductDetail/Omron/G9EB-1-B-DC12/?qs=M6j53hjKB4%2fPynp4bjS9BQ==


    I have difficulty determining what voltage the coil is of the model you want to replace. Does it say 12 Volts or 24 Volts. 24V seems to be more common.
    Could you check please ? A 24 Volt relay will maybe switch on 12 Volts but the contact resistance might be higher because the force to close the contacts is lower and because of that the contact can burn in and degrade faster. Usually these relays switch a transformer. As such, the contacts have to withstand a lot of punishment. Even with the rated voltage i think you need a relay that is specially designed to handle the currents and the high voltage sparks caused by the induction voltage of the primary coil of the transformer which feeds the magnetron tube. ^_^

    Here is some background information :

    http://www.google.nl/url?q=http://w...oQFjAA&usg=AFQjCNH7XaVLJSV1zBG_m7hpj0jKVh4IuQ

    Added this quote from the link above from page 5 :

    For those interested in the principle of the magnetron :
    And to find replacement parts :
    http://www.gallawa.com/microtech/magnetron.html

    More information.
    http://www.madehow.com/Volume-1/Microwave-Oven.html

    note :
    NO or N O= normally open, NC or N C = normally closed.
     
    #8 William Gaatjes, Jun 27, 2010
    Last edited: Jun 27, 2010
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