59 ohm resistor required..

[roadrash]

I am trying to repair a alarm system i own but i need to replace a resister thats gone off value due to getting hot. Its a 59 ohm - 1 watt - 5%. I have looked everywhere on the net and found nothing better than 250ma in 59 ohm's or minimum order quantities in the 1000's. Can anyone help with a small quantitry of either a 1 or 2w resister of this value please.

cheers
Jon

[CapLeaker]

Re: 59 ohm resister required..

If push comes to shove, then get a bunch of 56 ohm 5%. Take the one that comes closest to 59 ohm. In what circuit is it in and what does it do? Maybe post a pic of it. Is it through hole or smd? I checked Mouser and they have some 59 ohm 1w resistors.

[Sparkey55]

Re: 59 ohm resister required..

I am trying to repair a alarm system i own but i need to replace a resister thats gone off value due to getting hot. Its a 59 ohm - 1 watt - 5%. I have looked everywhere on the net and found nothing better than 250ma in 59 ohm's or minimum order quantities in the 1000's. Can anyone help with a small quantitry of either a 1 or 2w resister of this value please.

cheers
Jon

The first question asked is why is the resistor over heating? If you replace the resistor with a new one it will get hot too. You need more troubleshooting to find the cause of the hot resistor.

[ratdude747]

Re: 59 ohm resister required..

The first question asked is why is the resistor over heating? If you replace the resistor with a new one it will get hot too. You need more troubleshooting to find the cause of the hot resistor.

Seconded. While it is possible that the designer underspecced the wattage of the old resistor (this happens once in a while, especially when designs are rushed to market), there probably is something that is overloading the circuit. Or perhaps a voltage/current supply that is forcing too much power through the circuit.

[budm]

Re: 59 ohm resister required..

Upload good clear pictures both sides of the board so we see what the function of that 59 Ohms resistor is.

[Longbow]

Re: 59 ohm resister required..

Good suggestions. Also, if the resistor is burned, maybe the color bands (if there are any) are burned and not readable. In any case, there is no reason to hunt down a non-standard value since you can make the needed value very easily with 2 common values. The main thing is to fix the unit first.

[steveanddawn]

Re: 59 ohm resistor required..

Personally I would just put 60 ohms in, tolerances will allow for the difference. Also, how many detectors are on the system? The internal PSU's on alarm panels are not very highly rated. I more often than not have to fit an extra PSU just to take the extra load.