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

Thread Starter

greg123

Joined Mar 23, 2008
13
Hi,

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 :(

Greg.

Greg.
 

jpanhalt

Joined Jan 18, 2008
9,681
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.

http://relays.tycoelectronics.com/datasheets/p2.pdf

John
 

Thread Starter

greg123

Joined Mar 23, 2008
13
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 ;-)

Greg.
 
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