Any experts in the house?

Think it's a diode, maybe SOD124 package given the measurement (a smidge over 4mm for body itself).

Not finding anything convincingly correct from the markings.

Assistance appreciated.

🙂

Context is adjacent to relays in a convenience control module.

So flyback diode type thing I suppose.

This one exploded a bit.

22 minutes ago, Breezy_Pete said:

Any experts in the house?

Think it's a diode, maybe SOD124 package given the measurement (a smidge over 4mm for body itself).

Not finding anything convincingly correct from the markings.

Assistance appreciated.

🙂

It is a diode, I'll go through my data sheets for info and hopefully be able to identify an equivalent item.

What is it from?

Edited 50 minutes ago50 min by Graham Butcher

12 minutes ago, Graham Butcher said:

What is it from?

Convenience control unit (central locking plus alarm) from a VW T5 transporter.

See 2nd post.

I think that you are correct in it being a diode

https://www.ebay.co.uk/itm/188542129948

Just make sure that you get the correct physical size. It looks like an SMA (DO-214AC) surface-mount diode package with a nominal body dimension of 4.4 x 2.7 x 2.3 mm

24 minutes ago, Breezy_Pete said:

Convenience control unit (central locking plus alarm) from a VW T5 transporter.

See 2nd post.

OK, forget the PJ53 part, that is just code to identify the the manufacturer, who does not seem to be around any more. The import part of the number is GS1J which is 1A diode with a reverse voltage withstand of 600V..

That means that any diode with that code of GS1J will be a direct replacement. The concerning thing is why did it explode in the first place, it might well do the same again if you replace it.

From experience on a VW Passat, this module is located in a compartment in the front passenger footwell, and they can suffer from moisture ingress as the floor pan rusts away. So it might be the moisture that caused it to explode.

The only place I can see that has any is an eBay seller, link to it follows, Price is £3.55 and postage is £2.75.

If you can locate either a GS1K (800V) or a GS1M (1,000V) then they would also be a suitable replacement.

GS1J/SMA DIODE GEN PURPOSE 600V 1A SMA GS1J-SMA 'UK COMPANY SINCE 1983 NIKKO' | eBay UK