Power Tansistor

[ScottC]

Hello Everyone, I know this is a PLC forum but if we can just step to the world of obsolete semiconductors for one quick question, I would greatly appreciate any assistance you can give me. I am trying to find a Westcode WT5705 power transistor for a laser power supply. Or a suitable substitute. A search on google yields "Galco" which has it listed but not available.
Once again, I would appreciate any assistance. (Including any hardware forums you may know of.)
Thanks
Scott

 

[randylud]

Gotta keep on searchin'

The part number I used for the search was 2N5705 and I used this address for the search:
NTE Electronics
There is a recommended replacement there which is a NTE152 as well as data sheets for the NTE version. If you were familiar with Phillips Electronics, NTE is what Phillips became through some kind of business arrangement. Good luck!

 

[ScottC]

Randy, Thanks for the help but that one is not going to cut it. This is a High power transistor rated 300A continuous 450A peak, 500Volt sustaining voltage. 150KW switched power. It was produced in 1981 according to the Westcode tech bul. that I have. It really is the strangest looking transistor I have evere seen. Looks more like a SCR.
Thanks again. Looks like I get to do what you said....keep on searchin!
Scott

 

[JesperMP]

Go to Eng tips forums and look for a forum that specialises in power electronics.

 

[rootboy]

Saw the Galco site, no idea if any of the others would work as a subsitute.

Why not just contact Westcode and ask them?

http://www.westcode.com/index.htm

What about igbt's?


John

 

[tom_stalcup]

I did a google search for 300a power transistor, and had quite a few hits.... I don't know if they'll work for your application, but here is one link.
http://www.scrcontrols.com/ad_prod/power_trans.html

 

[randylud]

Nothing like the source

I would go to Westcode directly. They have a web site that I found with my first Google search. The url is http://www.westcode.com/, clever of them to disguise it huh? Good luck on finding that puppy.