Re: Peak current for 2512 resistor
- From: Jan Panteltje <pNaonStpealmtje@xxxxxxxxx>
- Date: Sun, 09 Nov 2008 16:19:08 GMT
On a sunny day (Sun, 09 Nov 2008 09:57:14 -0600) it happened Vladimir
Vassilevsky <antispam_bogus@xxxxxxxxxxx> wrote in
<4PDRk.4031$pr6.2926@xxxxxxxxxxxxxxxxxxxx>:
Problem:
There is a 1.5 Ohm 2512 conventional carbon film resistor which
occasionally has to take the current spike of up to 25A for several
hundred microseconds. Result: puff, spark, and a small hole in the
middle of the resistive layer.
What should be the right part to survive the spikes? It should be small,
cheap, low inductance. The tolerance of R up to +/-10% is fine.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Cannot you use a piece of resistance wire and zig-zag it (not coil it)
to avoid L?
http://en.wikipedia.org/wiki/Resistance_wire
.
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