MPSA42

[saturated]

I'm the proud owner of some now

Hopefully a situation arises where I need one or two 

I thought the specs were somewhat intriguing 

And the price $$ is nice 

[tonyharker]

What's special about those?

[Kaz Kylheku]

They are high voltage: collector-emitter voltage can go to 200V. 300V for the MPSA43.

They are useful for low-current, high(er) voltage amplification and switching.