Mouser Electronics and Digi-key will also have these relays. You don't need anywhere near that heavy a relay. A fan consuming 6 watts at 48 volts equates to only 0.125 amps. A small relay with contacts rated for 0.5 amp at 48Vdc will be more than adequate. Get a relay with a coil of 500 ohms to 1K (or even higher) to minimize energy usage.
Dan -------------------------------------------- On Thu, 8/8/13, jay peltz <j...@asis.com> wrote: Subject: Re: [RE-wrenches] Relay for 48v Vent Fan To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> Date: Thursday, August 8, 2013, 7:09 PM HI Rich, Grainger will have 12v coil relays that will switch 48v. jay peltz powerOn Aug 8, 2013, at 4:49 PM, Rich Nicol wrote: Hello Wrenches, Does anyone have any advice about what to use for a relay to power a 48 volt Zephyr battery vent fan using the 12 volt auxiliary output from the Midnite Classic Charge controllers. The fan only draws 6 watts but my problem is the 48 volt side of the equation. A supplier has recommend a double pole/double throw relay rated for up to 30 amps at 24 volts wired in series. I’m curious if anyone knows of a relay rated for 48volts (actually higher voltage since the fan is signaled to come on when the battery reaches gassing voltage) that would work in this application or if there is widespread agreement that the 24volt rated relay would work fine since we are requiring only minimal current and spreading between two contacts.As always, your input is greatly valued! Thanks,Rich _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -----Inline Attachment Follows----- _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
