Replacement help needed for BDX54C pnp darlington transistor

[Pete]

I have an exicom phone system with a faulty battery back switch, which
is a BDX54C pnp darlington transistor. It's in a TO-220 package, 100v,
8A, 750 hfe. It's being used to switch between mains-derived 24V DC and
battery power at mains failure, in a very simply circuit.

Can anyone suggest a possible replacement?

Thanks, Peter

 

[Phil Allison]

"Pete" <

I have an exicom phone system with a faulty battery back switch, which is a
BDX54C pnp darlington transistor. It's in a TO-220 package, 100v, 8A, 750
hfe. It's being used to switch between mains-derived 24V DC and battery
power at mains failure, in a very simply circuit.

Can anyone suggest a possible replacement?

** Another BDX54C ?

Available from WES or Farnell-in-One for a couple of dollars.

Also a TIP147 - same goes as above




......... Phil