Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Transistor type problem(Urgent)

Status
Not open for further replies.

Divutski

Newbie level 2
Joined
Jun 5, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
13
I have had a problem for some time.

my board got short-circuited for my welder.

the welding company doesn´t exist anymore.

Now i want to repair my welder, since it isn´t cheap to replace it.

I have a bipolar transistor called ST-4 wich i can´t find anywhere. the middle leg is not connected to the circuit, and have been cut. then i have a BC237B wich is common.

Do anyone know where i can find such transistor, with the specific name ST-4?
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
19,454
Helped
4,300
Reputation
8,605
Reaction score
4,260
Trophy points
1,393
Activity points
129,013
Hi,

it´s hard to help with your information.

pleas attach picture of the "transistor", and both sides of the PCB.
Pleas give informations - as much as you know. (voltages, current, what is this circuit for?....)

****
Because you said "one leg is cut" I don´t think it is a transistor. Maybe it is a similar case...

Klaus
 

Divutski

Newbie level 2
Joined
Jun 5, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
13
Klaus i will post some pictures and info in the evening.

And thank you for your reply

Regards David
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top