• shane717 (Customer)

    6A only, if the component needs more current then you would have to get another contactor or relay that can handle the current and voltage needed

    • Eric R (Customer)

      Thank you for the reply. The fan motors I plan on running are small ( rated 4 A total ). But I read in the reviews that these relays should be derated for "motor loads" to 20% rating ( 1.2 A ). I was just going to wire 3 of these relays in parallel ( to get in the ball park ) as I could not find a 24V AC Coil that was higher rated and has sufficient internal resistance for the signal circuit ( Based on the < 0.2 VA power consumption rating these appear to have large internal signal circuit resistance - around 2800 Ohms?). If I am out of line, tell me. I'm not an electrical engineer.

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      • Todd Dice (Customer)

        True they are derated, but I think your small fan motor should be fine. Do you know the HP rating of the fan motor?

      • Eric R (Customer)

        IMG_1571Two of those, so 0.1 Hp total.

         

         

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  • Todd Dice (Customer)

    Use a 781-1C-24D relay and a 781-1C-SKT socket. It is rated to 15A @ 230V

    • Eric R (Customer)

      This seems far superior to the "work around" I had planned... Do you know if these need to be derated for " motor loads as well?

  • shane717 (Customer)

    those come in 1,2, or 3 pole and have been working great for me on my projects

     

     

  • PouchesInc (Customer)

    This one has 24v AC coil like you said you needed, and 15A load rating, wich has a derating high enough for your 2.2A loads. Capable of 1/2HP load across the contact poles at 120v AC:

    https://www.automationdirect.com/adc/shopping/catalog/relays_-z-_timers/electro-mechanical_relays/square_-z-_cube_relays,_plug-in,_3a_-_15a_(78x-z-_qxx-z-h78x_series)/general_purpose,_15a_(781_-z-_782_-z-_783_-z-_784_series)/783-3c-24a

     

    The coil resistance is "only" 110ohms though. Do you know for sure you need kohm+ resistance? How come? The high resistance coils all seem to be higher voltage models according to the spec sheet for these series.

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    • Eric R (Customer)

      The coil resistance is "only" 110ohms though. Do you know for sure you need kohm+ resistance? How come? The high resistance coils all seem to be higher voltage models according to the spec sheet for these series.

       

      I think I need the high resistance for a few reasons:

       

      1. I'm not sure of the output on the 120VAC :24VAC transformer that supplies the signal voltage. So I was trying to keep current as low as possible in general. With the 110 Ohm resistance my signal current is 0.2 A. That doesn't seem high, but I don't know for sure at this point. maybe I could try to figure that out.
      2. The solenoid ( zone heating control valve ) that I'm getting the signal from is powered by said transformer. I was planning on pulling the signal off of the solenoid terminals thus putting the signal circuit in parallel with the solenoid. If my resistance is too low in the signal circuit, ( because there is some internal resistance of the transformer ) that could effectively suck current away from the solenoid ( by decreasing the source voltage through I²R losses ) and cause it not to open... as far as I can tell in theory. ( This could be a non issue in practice, but I don't have experience with the magnitudes of these effects ).
      3. Also, just maximizing efficiency by keeping current minimized.
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