ETD51 (-030) darlington transistor TO-220 case

snipped-for-privacy@privacy.net wrote:




I don't see anything online either.  Is this a repair problem, or do you  
have a box of those things and want to know what they're good for?

If it's a repair, I suggest posting a link to the schematic and a  
description of what the box does, to sci.electronics.repair--there are a  
lot more folks over there who can maybe help.

Good luck!

Cheers

Phil Hobbs

On 26/04/2022 16:26, Phil Hobbs wrote:






Ok, thanks for the guidance.  For the record, a BU941ZT was suggested as  
an alternative (its a motorcycle TCI box) - but I am not sure on what  
basis.  Either way, the latter doesn't work whereas the former did - to  
some extent :-/

Chris

On Tuesday, April 26, 2022 at 11:55:27 AM UTC-4, snipped-for-privacy@privacy.net wrote:

Is what you posted ETD51 the correct p/n?  I don't understand the suffix (-030).  All combinations of the p/n string turn up empty (house number?)
My cross ref catalogs the most recent is 2010, provides no crosses either.    
What does it do in the ckt?    

On 26/04/2022 19:42, Three Jeeps wrote:


ETD51 I think is the generic type whereas ETD51-030 was from a specific  
vendor (I think!).  It is used as a driver for the primary of the HT  
coil for the spark plug.

I have a datasheet for the BU941ZT which declares it to be an NPN  
darlington - I just want to check the ETD51-030 has similar  
characteristics and, above all, has the same pinout.

Chris