From owner-freebsd-questions@FreeBSD.ORG Wed Sep 17 17:38:54 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 08DAC16A4B3 for ; Wed, 17 Sep 2003 17:38:54 -0700 (PDT) Received: from priv-edtnes57.telusplanet.net (defout.telus.net [199.185.220.240]) by mx1.FreeBSD.org (Postfix) with ESMTP id ECC3943FE5 for ; Wed, 17 Sep 2003 17:38:52 -0700 (PDT) (envelope-from cpressey@catseye.mine.nu) Received: from kallisti.ca ([207.81.23.108]) by priv-edtnes57.telusplanet.netSMTP <20030918003852.CSKE24218.priv-edtnes57.telusplanet.net@kallisti.ca> for ; Wed, 17 Sep 2003 18:38:52 -0600 Date: Wed, 17 Sep 2003 17:41:23 -0700 From: Chris Pressey To: freebsd-questions@freebsd.org Message-Id: <20030917174123.2845104d.cpressey@catseye.mine.nu> In-Reply-To: <3F68FBEF.3040807@potentialtech.com> References: <3F68FBEF.3040807@potentialtech.com> Organization: Cat's Eye Technologies X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i386-portbld-freebsd4.8) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [OT] replacing fan with mismatched specs X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Sep 2003 00:38:54 -0000 X-List-Received-Date: Thu, 18 Sep 2003 00:38:54 -0000 On Wed, 17 Sep 2003 20:27:27 -0400 Bill Moran wrote: > This is terribly OT, but I'm asking here for two reasons: > 1) I have no idea where else to ask > 2) I know that someone on this list will know the answer > > Here's the problem. I have a switch that has a fan in it that failed. > I need to replace the fan. It's a 40MM .22Amp 5V. > > I can't find a fan with those specs anywhere! The best I can find is > a 40MM .13amp 5V. > > So, will that fan work? With the amp rating different like that, will > the fan just burn out? Will it run just fine? I'm going to be really > upset if I have to replace the entire switch because of one fan! > > Advice is appreciated. Disclaimer: I am not a certified electrician, but... Voltage and size are the same, so that's good. The remaining figure, 0.13 amp, tells you how much current the component draws from the power supply. Since 0.13 is less than 0.22, that means this fan draws less power than the old fan. Which means that you should be able to replace it without any danger of overloading your power supply (in fact your power supply will have a slightly easier time with the new fan.) So, in short, yes, it will work. However, something to check would be the RPM of the new fan versus the old one. A slower fan won't cool as well, and that might lead to problems of an entirely different nature (overheating.) -Chris