PCB mounting 12v low-profile DPDT relays, 8A contacts, sealed case.
(I know I said 10A, but 8A will suffice - I'll include a 7.5A fuse in the supply line, just to be sure!
) [Edited on 18/12/09 by David Jenkins]
Anyone know where I can find some automotive-grade DPDT relays at a sensible price? I'll need a contact rating of 10A (or better). Oh - I need
two!
I've found a non-auto-grade relay on Rapid's site, but I wonder about its durability in a car.
Notes:
DPDT = double-pole double-throw - 2 sets of change over contacts.
Automotive grade = suitable for working in a dirty, vibrating environment using a power supply that's full of spikes etc.
Vehicle wiring products, your local Durite stockist's or possibly Stafford Vehicle Components? Could you use 2 relays if you get stuck?
Likely you end up using 4 relays.
I'd rather not use 4 relays - that will just makes a simple circuit too complicated! And inelegant...
I've looked at VWP and SVC (and a lot more) without success.
If it comes to it I'll just use non-auto relays - the most durable I can find.
Maplins or RS catalogue may have some but might be wrong sort of connectors?
What about up to the scrappy and pull a few out a fordy fuse box ....?
Along as you don;t exceed the current and voltage and relay should last long enough as long as it is kept "dry" (well with in reasons)
[Edited on 18/1212/09 by mad4x4]
quote:
Originally posted by mad4x4
What about up to the scrappy and pull a few out a fordy fuse box ....?
Along as you don;t exceed the current and voltage and relay should last long enough as long as it is kept "dry" (well with in reasons)
[Edited on 18/1212/09 by mad4x4]
http://www.zettlerauto.com/products/
AZ935 should do the trick
Thanks to everyone - I found something suitable on The Bay of E this afternoon...
PCB mounting 12v low-profile DPDT relays, 8A contacts, sealed case.
(I know I said 10A, but 8A will suffice - I'll include a 7.5A fuse in the supply line, just to be sure! )
[Edited on 18/12/09 by David Jenkins]
You may use Solid State relays from RS. These will be as Vibration and Moisture Resistant as can be.
Angel - I think I've got what I need.
Now another question - what width track do I need on a PCB to carry up to 7.5 - 8A max current, typical 4A? I'm talking about general-purpose
PCB here, not 'specially thick copper' sort of stuff.
[Edited on 19/12/09 by David Jenkins]
quote:
Originally posted by David Jenkins
Now another question - what width track do I need on a PCB to carry up to 7.5 - 8A max current, typical 4A? I'm talking about general-purpose PCB here, not 'specially thick copper' sort of stuff.
quote:
Originally posted by iank
quote:
Originally posted by David Jenkins
Now another question - what width track do I need on a PCB to carry up to 7.5 - 8A max current, typical 4A? I'm talking about general-purpose PCB here, not 'specially thick copper' sort of stuff.
Ask and the internet will provide
http://desmith.net/NMdS/Electronics/TraceWidth.html
One cheat, if you don't care much for the looks, is to solder tinned copper wire along the PCB trace to make your own extra thick tracks.
[Edited on 19/12/09 by iank]
David , you have u2u