Part identification help

Can someone point me in the right direction on which part this is please. I appreciate your help.


The diode it looks to read gw83 then 240 under that.

Hi celltecphones,

Welcome to the TechForum.

I could not positively ID that part, but it seems likely to be a unipolar TVS in an SMB package (aka DO-214AA package). The SM6T220A TVS does have a “GW” marking, among other markings, but the other markings are somewhat different, so your part is definitely not that exact part. It’s possible that your part is an equivalent part from another manufacturer, but I can’t say with any certainty.

The SM6T220A has a reverse-stand-off voltage of 188V, which would make it suitable to be placed on the secondary (rectified) side of a bridge rectifier for use in a product with a 120Vac input. If that is where it’s located on your circuit board, this may be a suitable part.

Note this is all speculation on my part, with no guarantee that it is correct.