I don't know what you have seen but the percentage of components failing at the lie side of the range is pretty small. Having said that, we might have temps down to +10 f for three days on the extreme side so what do I know. On May 18, 2015 9:09 PM, "Forrest Christian (List Account)" < [email protected]> wrote:
> What is the lowest temperature that each of you would normally expect to > see in your enclosures? > > The reason I'm asking is that I'm in the process of developing up a few > new products. > > To date, all of the packetflux products are designed with components rated > -40 to +85C (I.E way cold to way hot). I'd like to retain this rating, > but I'm running into a minor snag: > > For storage, I'm planning on integrating a SD card (probably microSD) in a > socket. I only need a GB or so, and SD card memory is inexpensive at that > range. > > Unfortunately, all the reasonably priced SD cards are only rated down to > about -25C or -13F. which are about ~$3 in qty. "Industrial temperature > range" ones which are good down to -40C/F are available but they add at > least $30 to the cost for non-name brand, and even more for known brands. > When you're talking about a $100 end-user price, a $30 1GB SD card seems > excessive - and probably isn't even possible if I want to meet the $100 > price with some margin. > > So, I'm currently playing the 'what options do I have' game. I hate to > ship a product only rated down to -25C/-13F, but I know for at least a > large chunk of my customer base they never see below this temperature, > especially when you add a watt of power dissipation in the case with the > device. Which leads me back to my original question: What's the lowest > temperature most people would expect to see inside their enclosures. > > -- > *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > [email protected] | http://www.packetflux.com > <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> > <http://twitter.com/@packetflux> > >
