[Elecraft] Polyfuse for KX3 external battery

[Bob]

Try this reference:
http://www.littelfuse.com/data/en/Product_Brochures/EC327-E_Polyfuse_PTC.pdf

Be aware that the polyfuse is a thermal device and reacts rather slowly.
 LiPo/LiFePO4 batteries are VERY low impedance and can put out hundreds of
amps into a short circuit.  That can easily exceed the ratings of standard
polyfuses.  Those designed for battery service, like the VT series, are
somewhat more robust but can be physically larger.

Personally I rely on standard ATC fuses in series with the power leads.

73, Bob, WB4SON


On Tue, Aug 13, 2013 at 2:43 PM, KD0GLS <kd0gls at mninter.net> wrote:

> Wondering if anyone here has made use of a polyfuse between an external
> SLA battery and a KX3.  I'm interested in your experiences with these
> devices and in any specific hold and/or trip current values you've tried
> and had good (or bad) luck with.
>
> 72,
> Brent, KD0GLS, Minneapolis
>
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