UK supplier for 12v, 5a relay with <200mw coil

Discussion in 'General Electronics Chat' started by greg123, Mar 23, 2008.

  1. greg123

    Thread Starter Member

    Mar 23, 2008

    I wonder if anyone can advise me of a good UK supplier for componants, I'm working on a 555 based circuit and I need a couple of relays that switch on a 12v supply to coil & 12v load (both 9 - 14.4v car 12v supply) that can run 5a or 10a loads (5a enough, 10a better) and be driven directly by my 555. This means a coil of less than 200mw, I'm guessing <160mw to be on the safe side.

    Oh yes, it has to be SPDT (I guess I could use DPDT and only use one set of contacts) and be smallish for eventual PCB mount after I'm past the breadboard stage.

    I have been a bit of a loss finding lots of RS stuff is 'no longer stocked' and I can't find a suitable relay. Either wrong voltage or coil power to high etc. A little relay like this should be a couple of pounds and easy to come by surely?

    I also can't find a 10% 120uf tantalum capacitor, or a 100uf one, at 16v on RS or Maplin :(


  2. SgtWookie


    Jul 17, 2007
  3. hgmjr

    Retired Moderator

    Jan 28, 2005
  4. jpanhalt


    Jan 18, 2008
    Here are two nice options:

    1) Digikey #PB988-ND is 16A with 33 mA coil at 12V - a little over 200 mW, but can be driven by a 555 that can source up to 200 mA. (Did you mean mA, not mW?) It is the Tyco/PotterBrumfield RT series;

    2) Another Tyco/Axicon (Digikey #PB1058-ND) has 5 A contacts and even lower current. Since Tyco/Schrack/PB is worldwide, I suspect a vendor in the UK has them too. They were quite reasonably priced in USD.

  5. n9352527

    AAC Fanatic!

    Oct 14, 2005
  6. greg123

    Thread Starter Member

    Mar 23, 2008
    Thanks guys. As I'm in the UK I can't buy from Radio Shack but I like the idea of using a DPDT doubled up.

    I think I have been getting myself confused, the output from the 555 is 200mA max - so am I correct in saying that @ 12v that means I can go up to a 2400mW coil power? I won't even need to go over 1000mW coil power actually, getting my mW and mA mixed up I was looking for a virtually non-existant relay!

    I will go now and look up those suggestions or see if I can find something similar!

    Thankyou ;-)