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Electronics => Projects, Designs, and Technical Stuff => Topic started by: ttx450 on August 17, 2021, 01:05:35 am

Title: 417 295 transistor replacement?
Post by: ttx450 on August 17, 2021, 01:05:35 am

Hello all,

I have an old transistor that needs replacing.  I think that it's obsolete, it came out of a Heathkit clock kit.  Need a replacement, having a hard time finding the datasheet?  I dont know manufacture, it's a 417 259. Any help appreciated.. thks.

Title: Re: 417 295 transistor replacement?
Post by: bdunham7 on August 17, 2021, 01:13:41 am

That is a Heathkit part number, a 100V PNP TO-92 transistor, and it crosses to an MPSL51, which is mostly obsolete.  NTE and Central Semiconductor still show it, so you may find it somewhere either as a current offering or as NOS from Amazon or eBay.

Title: Re: 417 295 transistor replacement?
Post by: ttx450 on August 17, 2021, 01:29:16 am

Thanks, did not realize that.  da..  I did not know HK put there own part numbers on there stuff..  thks.. :palm:

Title: Re: 417 295 transistor replacement?
Post by: WattsThat on August 17, 2021, 06:11:21 pm

If its the TO-92 417-295 (not -259) you’re looking for, I have a few original old stock Heathkit parts. Send me a pm if you want one.

GC-1005 or -1092?

Title: Re: 417 295 transistor replacement?
Post by: ttx450 on August 17, 2021, 10:19:53 pm

Thanks, got 5 NTE MPSL51 & free shipping coming from amazon.  for 5 bucks plus tax..  not to bad with free ship.  thks for your offer

GC-1005