BC221

Spec here

Part Number BC221 Military/High-Rel N V(BR)CEO (V) 30 V(BR)CBO (V) 30 I(C) Max. (A) 500m Absolute Max. Power Diss. (W) 300m Maximum Operating Temp (øC) 175õ I(CBO) Max. (A) 500nØ @V(CBO) (V) (Test Condition) V(CE)sat Max. (V) @I(C) (A) (Test Condition) @I(B) (A) (Test Condition) h(FE) Min. Current gain. 50 h(FE) Max. Current gain. @I(C) (A) (Test Condition) 10m @V(CE) (V) (Test Condition) 5.0 f(T) Min. (Hz) Transition Freq 150M @I(C) (A) (Test Condition) @V(CE) (V) (Test Condition) C(obo) (Max) (F) 8.0p @V(CB) (V) (Test Condition) @Freq. (Hz) (Test Condition) Package Style TO-105 Mounting Style T Pinout Equivalence Code N/A Description

To my generation, a BC221 is a heterodyne frequency meter :-)

-- "Electricity is of two kinds, positive and negative. The difference is, I presume, that one comes a little more expensive, but is more durable; the other is a cheaper thing, but the moths get into it." (Stephen Leacock)

Hey, I opened the message expecting to tell the poster that there were better places to ask about the thing. sci.electronics.misc seeme too vague, and I'd expect too few people here to have heard of the thing.

Then I realized it was a transistor he was asking about, and not the piece of WWII surplus.

Michael

As no indication of application was given, why not just go up a few number to a BC337/BC327 (ive not looked up BC221 BTW) As its a general transistor I assume its a general application. V/A is about the same.

Chris