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Author Topic: Help With Part Numbers for Siemens U273 & W293  (Read 2329 times)


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  • Real Full Name: Barry McDonald
Help With Part Numbers for Siemens U273 & W293
« on: February 04, 2016, 04:36:51 pm »

Hello to all,

This is my first post here, though I've been an avid reader of the forum for some years.

I'm working with a tech who's repairing a couple of Siemens U273 and W293 units for me.

In order for him to proceed with his work, he needs to find equivalent modern part numbers for the original components he has identified as faulty. The tech believes that the Siemens components are numbered uniquely, as his usually reliable avenues of research have failed to turn up equivalents.

I'm wondering if anyone in this forum can help us. Here's an excerpt from an email I received, explaining the situation in detail:

"...As I mentioned I think that a number of the semiconductor devices in these Siemens products are custom order and hence have unique part numbers.

In the compressor I have managed to find an equivalent for only one transistor: Ts 1 and Ts 2 are quoted as a BCY 66 which has an equivalent part number BC 184.

A number of other devices are Texas Instrument NPN with part numbers SST 116, SST 117, SST 116M and SST 117M, for which I can't find equivalents.

The high pass filters have a pair of 10 pin op amps with part numbers such as MC 1461R, MC 1554G, SC 5141G which also appear to be unique orders."

We'd be very grateful for any advice and information,


Barry Mcdonald
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