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American Microsemiconductor, Inc. - AMS: Unijunction Transistor (UJT)
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Unijunction Transistor (UJT) from American Microsemiconductor.
The unijunction transistor (UJT) is a three terminal, single junction device with characteristics very different from the conventional 2 junction, bipolar transistor. Actually it is not a transistor at all but is correctly a type of thyristor. American Microsemiconductor has been producing a very broad line of standard unijunction transistors to the Electronic Industry for over 40 years.. Many of the basic applications include: Oscillators, Timers, Sawtooth generators, SCR triggers, Frequency dividers, Stable voltage sensing.
Basic Specifications of a Unijunction Transistor are:
- Vbb(max) - The maximum interbase voltage that can be applied to the unijunction transistor
- Rbb-the interbase resistance of the unijunction transistor
- η - The intrinsic standoff ratio of unijunction transistor which defines Vp.
- Ip - The peakpoint emitter current of the unijunction transistor
American Microsemiconductor produces a very broad line of standard unijunction transistors.
Here are a few UJT From American Microsemiconductor: (click below for specifications, ordering and pricing information)
- 2N1671 , 2N1671A , 2N1671B , 2N1671C
- 2N2417A
- 2N2646 , 2N2647
- 2N3980
- 2N4851 , 2N4852 , 2N4853 , 2N4870 , 2N4871
- 2N489 , 2N490 , 2N491 , 2N491A , 2N491B ,
- 2N492 , 2N493 , 2N494C
- 2N4948 , 2N4949
- 2N492A 2N492B
- MU4891 , MU4894
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