Author Topic: What component is this?  (Read 627 times)

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Offline LeWidgetTopic starter

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What component is this?
« on: June 14, 2023, 05:48:30 pm »
Hi all,

Think my last post under 'Beginners' got deleted so riposting here.

I'm trying to repair a window wiper motor which seemed to have water damage. I've cleaned it up but one of the three brushes was badly damaged. Looking at it, it seems to be some sort of electrical component. Is anyone able to identify it? I had a Google but no matches.



 

Offline SeanB

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Re: What component is this?
« Reply #1 on: June 14, 2023, 06:19:37 pm »
Funny enough met that this week, it is a PTC fuse, there to prevent the motor burning out with overload, by switching to a higher resistance state. Not sure about replacing it, as it is likely only an OEM only part, but you can bridge it out for testing, and replace with a 130C one time thermal fuse later on. Had to make the new brushes fit, using sandpaper to make the new brushes small enough to fit the brush holders, as we could not get any that were an exact fit. 2 hours driving around, and $1 for the new ones....... now all we need to do is find a new window switch cluster, seeing as the old one got fried because of the worn brushes, though it has had somebody in there before, lots of 'rework" wires bodged in on the PCB to replace the thin traces.
 

Offline Infraviolet

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Re: What component is this?
« Reply #2 on: June 14, 2023, 09:10:57 pm »
If you measure its size you'll probably be able to find an SMD polyfuse which would fit. A thorough hunt through the datasheets from major polyfuse manufacturers (usually there is one datasheet for a whole series of different size and curent capacity fuses from the same series) might also find the same marking number, which you could check in their tables so you could find what hold and trip currents the blown polyfuse used to be rated for. Then buy any which fits the same size and currents specs.
 

Offline LeWidgetTopic starter

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Re: What component is this?
« Reply #3 on: June 21, 2023, 06:23:27 am »
Sorry for the late reply. Thanks for the feedback, much appreciated  :). I'll have to keep this in mind for future. The motor was in poor shape so i ended up getting a used replacement motor. I opening it up and took a photo of the fuse, though it seemed to be attached to a contact point at one end, I didn't end up taking it all apart.


 
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