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Old 17th January 2013, 01:16 PM   #1
maylar is offline maylar  United States
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Default What's a fuseable resistor?

A friend of mine needs to replace a resistor in his printer (not audio, sorry) that's listed as a "fuseable" resistor. In the fuse module there are 2 resistors, a 100K maybe 1/4 watt and this fuseable 56 ohm thing that looks to be a standard metal film part:

Click the image to open in full size.

I can't find anything in Mouser or DigiKey that references fuseable resistors, so I'm wondering what's special about it and what's the best replacement item. He says the part is open circuit, so obviously it does act as a "fuse".

Thing is, I've seen metal film resistors catch fire when overloaded so I'm really at a loss here.
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Old 17th January 2013, 01:34 PM   #2
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It is not a metal film resistor. Most common place i found these fuseable or saftey resistors was within CRT Televisions ... Used to buy mine from a place called wiltsgrove electronics in birmingham
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Old 17th January 2013, 01:35 PM   #3
oz7aff is offline oz7aff  Denmark
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Fusible resistors is exactly what the name says, a resistor that act as a fuse. They was very often used in tube type monitors, in the high voltage supply.
You should be able to find them searcing for fusible resistor og fuseable resistor.
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Old 17th January 2013, 01:38 PM   #4
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They can be found here Electronic Components | Electronic Parts | Farnell United Kingdom
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Old 17th January 2013, 02:16 PM   #5
Enzo is offline Enzo  United States
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I'd take the advice oz7aff gave - do your search for "fusible" resistors. I just plugged that into Mouser and it came back with a bunch. A place to start anyway.
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Old 17th January 2013, 08:15 PM   #6
maylar is offline maylar  United States
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Quote:
Originally Posted by Enzo View Post
I'd take the advice oz7aff gave - do your search for "fusible" resistors. I just plugged that into Mouser and it came back with a bunch. A place to start anyway.
Thanks a bunch. Silly me.. a spelling error.
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Old 17th January 2013, 08:51 PM   #7
sreten is offline sreten  United Kingdom
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Hi,

I'd say its a part guaranteed to go open circuit if overloaded, and
guaranteed to able to interrupt certain voltages and currents.

I'd guess its possible melting resistors could go lower in value
and short, rather than go open, but I've never seen it, all
fried resistors I've come across have been open circuit.

Perhaps an extra section that melts at a given power.

rgds, sreten.
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