PCB experts please help! What do I need to order

[Funny username]

Can you please help me and identify what I need to order below?

The red ringed varistor and fuse have gone....that’s all i know, I think the 4032 is the size of the varistor but the numbers below don’t mean much?

Like wise the fuse, does the markings mean 1a, 250v?


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[imck]

I think the Fuse is 250V 3A Time Delay

This may help with the Varistor
http://www.farnell.com/datasheets/2015603.pdf

[Funny username]

Thanks imck


With regards to the fuse, what gives the 3a away? I’m struggling to understand as there is sod all designation on it.

[mike9009]

The varistor is an Epcos.

Similar to this on Farnell


https://uk.farnell.com/epcos/b72660m0271k072/varis...

[Funny username]

mike9009 said:

The varistor is an Epcos.

Similar to this on Farnell


https://uk.farnell.com/epcos/b72660m0271k072/varis...

Thanks Mike will order that. What do you think about the fuse? 250v 1A?

[mike9009]

Funny username said:

mike9009 said:

The varistor is an Epcos.

Similar to this on Farnell


https://uk.farnell.com/epcos/b72660m0271k072/varis...

Thanks Mike will order that. What do you think about the fuse? 250v 1A?

I agree it looks like 1A, judging by the silk screen print on the board. I don't have the experience to know exactly what it is though, the time to blow could be different. What is the board from? Any chance of getting a BOM from somewhere?

I'll ask a few guys at work who have more experience....

[imck]

Funny username said:

Thanks imck


With regards to the fuse, what gives the 3a away? I’m struggling to understand as there is sod all designation on it.

It looks like 'T3' on the Fuse
I missed the '1AT' printed on the Board !

Suspect it is a 1 Amp. Sorry !

[tribbles]

One thing that bothered me when I first saw the thread (I was on my phone, and I didn't want to write a long reply on it, and promptly forgot!) is do you know why the two components have failed?

The circuit looks like it's part of a switched mode power supply, and it can be quite dangerous to try to repair them - and I would be concerned that it'll immediately fail again after the repair.

Unless, of course, you know why it failed and therefore know that it won't happen again

There's some hefty capacitors (350V) near the bottom of the image, and this would suggest a 250V input supply (assuming a modicum of overprovisioning for the voltage).

In terms of the fuse, I'd be tempted by Littefuse, but without knowing the dimensions, I can't say what part number. Certainly, as has been indicated above, 1AT would suggest 1A, time-delay fuse, so maybe 465 series - although that might be too long. Siba 160000 series might be a better match.