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Saturday, February 3, 2007

Appearance of the Transistor

    The outward appearance of the transistor varies. Here, two kinds are shown.




On the left in the photograph is a 2SC1815 transistor, which is good for use in a digital circuit. They are inexpensive when I buy them in quantity. In Japan it costs 2,000 yen for a pack of 200 pieces. (About 10 US cents/piece in 1998)

On the right is a device which is used when a large current is to be handled. Its part number is 2SD880.





The electrical characteristics of each is as follows.

Item2SC18152SD880
VCEO(V)5060
IC(mA)1503A
PC(mW)40030W
hFE70 - 70060 - 300
fT(MHz)803


VCEO: The maximum voltage that can be handled across the collector(C)
and emitter(E) when the base(B) is open. (Not connected)
(It may be shown as VCE)
IC:The maximum collector(C) current.
PC: Maximum collector(C) loss that continuously can cause it consumed
at surroundings temperature (Ta)=25°C
(no radiator)
hFE: The current gain to DC at the emitter(E).
(IC/IB)
fT:The maximum DC switching frequency. (the transision frequency)


Data sheet for 2SC1815