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30 Amp switch?

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bicyclop(at)pacbell.net
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Posted: Mon Jul 21, 2008 8:26 pm Post subject: 30 Amp switch?

I have a setup where I need to switch about 30 amps as a backup power 

source. Is there such an animal as a toggle switch that will handle 

that, or do I need to think about a relay?



Pax,



Ed Holyoke

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dsvs(at)ca.rr.com
Guest

Posted: Mon Jul 21, 2008 8:37 pm Post subject: 30 Amp switch?

Ed,

The marine guys use a battery switch that would handle the thirty amps.

Problem is it is big and fairly expensive.  A relay would probably be

better.  Don VS



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rshannon

Joined: 05 Sep 2007
Posts: 62

Posted: Tue Jul 22, 2008 7:57 am Post subject: 30 Amp switch?

FYI, there are several good, small relays available for this purpose. For a FWF location, my choice would be the P&B T92D11D-12, rated 30A with quick tab connections, available from Digikey or Mouser. Prolink makes a couple rated at 40A, available from Circuit Specialists, see http://tinyurl.com/5pj6tm. The former are all lightweight, with low coil current requirements. There are also several automotive relays (Bosch, etc.) with these ratings. If it will be in a weather protected location, i.e., aft of the FW, you might also want to consider the solid state Powerlink III Jr., rated 35A continuous, from Perihelion, with a very low control current, though it's a little bit heavier than the P&B.

 

Ron



On Mon, Jul 21, 2008 at 9:34 PM, Don Vs <dsvs(at)ca.rr.com (dsvs(at)ca.rr.com)> wrote:

[quote] --> AeroElectric-List message posted by: "Don Vs" <dsvs(at)ca.rr.com (dsvs(at)ca.rr.com)>

 

 Ed,

 The marine guys use a battery switch that would handle the thirty amps.

 Problem is it is big and fairly expensive.  A relay would probably be

 better.  Don VS

 



 --

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nuckolls.bob(at)cox.net
Guest

Posted: Thu Jul 24, 2008 6:14 am Post subject: 30 Amp switch?

At 08:52 AM 7/22/2008 -0700, you wrote:

 	  Quote: 	
		  FYI, there are several good, small relays available for this purpose. For 

a FWF location, my choice would be the P&B T92D11D-12, rated 30A with 

quick tab connections, available from Digikey or Mouser. Prolink makes a 

couple rated at 40A, available from Circuit Specialists, see 

<http://tinyurl.com/5pj6tm>http://tinyurl.com/5pj6tm. The former are all 

lightweight, with low coil current requirements. There are also several 

automotive relays (Bosch, etc.) with these ratings. If it will be in a 

weather protected location, i.e., aft of the FW, you might also want to 

consider the solid state Powerlink III Jr., rated 35A continuous, from 

Perihelion, with a very low control current, though it's a little bit 

heavier than the P&B.


	


   Good recommendation. I concur. This is the same

   style of relay offered by B&C as their S704-1

   and looks like this:



http://aeroelectric.com/Pictures/Relays/s704-1l.jpg



   if you need to put your hands on a suitable product

   right away and there's a Radio Shack handy, you

   might consider this device:



http://tinyurl.com/69mypb



   Bob . . .

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