BC221

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Simon Keymer - 04 Jul 2005 19:29 GMT

Hello

I don't know if I'm on the correct forum but can anyone help me?

I need to know what transistor I can substitute for a BC221 as I'm having
trouble getting one.

Many thanks

Simon K.

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CWatters - 04 Jul 2005 19:51 GMT

> Hello
>
> I don't know if I'm on the correct forum but can anyone help me?
>
> I need to know what transistor I can substitute for a BC221 as I'm having
> trouble getting one.

Spec here
http://www.americanmicrosemi.com/products/specs/BC221.phtml

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

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Fred Abse - 05 Jul 2005 21:31 GMT

> I need to know what transistor I can substitute for a BC221 as I'm having
> trouble getting one.

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

Signature

"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)

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Michael Black - 05 Jul 2005 22:10 GMT

>> I need to know what transistor I can substitute for a BC221 as I'm having
>> trouble getting one.
>
> To my generation, a BC221 is a heterodyne frequency meter :-)

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

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exxos - 30 Jul 2005 16:34 GMT

> Hello
>
[quoted text clipped - 6 lines]
>
> Simon K.

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

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Electronics Forum / Electronics / July 2005

BC221