• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Help with finding obsolete Motorola 43121 transistor

Status
Not open for further replies.

marczee

New Member
I need to replace this transistor since it has tested bad...
I cannot find a single thing about it anywhere. It has the Motorola insignia and says 43121, then on the back it has 3 color bars, red, silver, and yellow.
Here is some pics of it and also in circuit.. (Q6 on schematic)
 

Attachments

Hero999

Banned
I couldn't find it using Google.

Please post the entire schematic.

How do you know it's bust, have you tersted it?

The chances are any small transistor will do.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
It's a low current 35V odd regulator - what to use really depends what voltage is been fed to the collector.

I'd try a BC107 for a start, but any general purpose NPN will probably do.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top