Help with "complementary" SCR

[vindoline]

Help, I have a Power Designs TW6050A supply with a non-functioning over-voltage crowbar circuit. Close inspection of the board shows that CR25 let out the magic smoke a long time ago. This is an old GE part number C13F. It's an odd "complementary" SCR. The gate is on the anode side. I found a reference to it in a 1977 GE semiconductor data book.

I've had no luck finding any information about a replacement. Does anyone have any ideas?

[T3sl4co1l]

PUT.

Any should do, which is fortunate because basically only one exists anymore: 2N6027.

Tim

[vindoline]

Tim, Thanks so much! Of course they changed the name 

[JoeO]

Tim, Thanks so much! Of course they changed the name 

The GE Semi Data Book link in your first post has a lot of useful information.
Thanks for the link!

[vindoline]

The GE Semi Data Book link in your first post has a lot of useful information.
Thanks for the link!

You're welcome 

[Chris56000]

Hi!

There's also a Pro–Electron coded device called the BRY39 that used to be used in the field timebase oscillator stage of early s/s colour TV sets that had both an anode–gate and a cathode gate, you might be able to try this device with a 1k resistor between cathode–gate and cathode (use an ⅛W resistor) to prevent random triggering!

The BRY39 shouldn't be too hard to find as vast piles of early solid–state TV sets used it!

Chris Williams

[vindoline]

There's also a Pro–Electron coded device called the BRY39 that used to be used in the field timebase oscillator stage of early s/s colour TV sets that had both an anode–gate and a cathode gate, you might be able to try this device with a 1k resistor between cathode–gate and cathode (use an ⅛W resistor) to prevent random triggering!

Chris Williams

Thanks! It's great to have several alternatives. The BRY39 looks to be rarer/more expensive than the 2N6027.  I'll give that a try first and report on its performance.

[vindoline]

Just to wrap this up, I got the 2N6027 and replaced the blown C13F. The over voltage crowbar is now working fine  . Thanks everyone!