So this looks to be a 47 Ohm resistor, but am I righ in thinking this is 1 watt?
resistor wattage
- Thread starter binky
- Start date
Help Support Talk Electrician Forum:
- Joined
- Aug 3, 2009
- Messages
- 1,771
- Reaction score
- 237
Hard to tell from pic as no scale, far away cow wee cow, close cow big cow however
1 watt resistor is about 11mm long
1/2 watt resistor is about 8mm long
1 watt resistor is about 11mm long
1/2 watt resistor is about 8mm long
- Joined
- Nov 28, 2009
- Messages
- 14,674
- Reaction score
- 829
Replace with the largest wattage that will fit the space, even if that is bigger than what was there.
What is it doing, circuit wise? If its a power application, not high frequency, you can put a wire wound in. They are almost bomb proof.
Whew. Little more context here guys
What/where was this ?
Did this component fail in service ?
Was it intended to fuse or fail in a fault condition ?
what current is it carrying at what frequency ?
if it was a fusible safety resistor for example (often seen in TVs and power supplies) the advice so far is a bit like
‘ a 3A fuse blew !
Stuff a 13 in if it fits then.
Or a wood screw -they never blow
ps it could also be a 47uH choke (inductor)
What/where was this ?
Did this component fail in service ?
Was it intended to fuse or fail in a fault condition ?
what current is it carrying at what frequency ?
if it was a fusible safety resistor for example (often seen in TVs and power supplies) the advice so far is a bit like
‘ a 3A fuse blew !
Stuff a 13 in if it fits then.
Or a wood screw -they never blow
ps it could also be a 47uH choke (inductor)
Last edited by a moderator:
it's part of the PCB for a Bosch tumble drier which has been working well for 7 years. It failed by degrees, ie it would work for 10 mins then stop until such time as it wouldn't work at all. I believe it's on the 12V control side of the board
I guess a circuit diagram is out of the question but it also appears to have failed in a dramatic fashion. I’d be using a pin as a probe to see if I could tap into the broken circuit in the hole. If there’s resistance to either end of more than an ohm or two it’s probably a resistor and replacing with a same size resistor is the safer option anyway ( vs guessing choke and being wrong). If it’s lower it’s probably a choke (32uH)
in either case the item may be the fuse rather than the problem
Last edited by a moderator:
brill! thank you. I've changed all the usual cheaper culprits ie sensors for this machine, which left the control board at a mere £240, so I'm quite happy to fit a 16p resistor and see if it works. I suspect it's just died out of old age, it has been getting used quite a lot with the son home for the last year.
Last edited by a moderator:
