need help again

Discussion in 'The Projects Forum' started by oolesh, Apr 27, 2012.

  1. oolesh

    Thread Starter New Member

    Apr 21, 2012
    hi guys
    i have see a relay on ebay the Specifications is below
    do u think if i can put a 12vdc OUTPUT of the relay because i see only 28vdc??or 28vdc is the maximum current?? what did this mean 'Coil rated voltage: 3-48VDC' :confused: can i put 3vdc 'INPUT' it will work??THANKS

    • Contact form: 1a, 1b, 1c
    • Rated load: 10A 240VAC/28VDC,10A 125VAC/28VDC,7A 240VAC/28VDC
    • Contact resistance: <=100m (ohm)
    • Electrical life: 100,000
    • Mechanical life: 10,000,000
    • coil rated voltage; 3-48vdc
    • Coil power: 0.36W, 0.45W
    • Coil pick-up voltage: <=75%
    • Coil drop-out voltage: >=10%
    • Ambient temperature: -25 degrees Celsius to +70 degrees Celsius
    • Coil and contacts:1500VAC/min
    • Contact and contacts: 1000VAC/min
    • Insulation resistance: >=100M (ohm)
    • Mounting form: PCB
    • Weight (g): 10

    • Outline dimensions (mm): 19.0x 15.5 x 15.0
    Last edited: Apr 27, 2012
  2. debjit625

    Well-Known Member

    Apr 17, 2010
    Didn’t understood what you are trying to say.
    28 VDC is a voltage rating its not current, current is measured in Amperes

    It means you can apply 3 VDC minimum to the coil and 48 VDC maximum to the coil to energized the relay.

    As per specifications it should work.

    Good Luck
  3. t06afre

    AAC Fanatic!

    May 11, 2009
    Hi Oolesh.
    If you need a cheap 12 volt DC realy. Go to a scrapyard and take one out from a old car.
  4. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    In my experience a "coil rated voltage: 3-48VDC" would mean that that model is available in coil voltages ranging from 3VDC to 48VDC. Like 3v, 5v, 6v, 12v, 24v, 48V. Never seen a relay that had a voltage rating that will withstand 48V on the coil and dropout at less that 3V. How about a link to the eBay post?

  5. oolesh

    Thread Starter New Member

    Apr 21, 2012
  6. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    Right at the top of the page "Mini 5V DC Power Relay". Its coil is rated for operation at 5VDC, and the contacts are rates for a maximum current 10A at voltages up to 28VDC.