The 2N2646 is a silicon PN Unijunction Transistor that can be used in a variety of industrial applications. The device is commonly used as a triggering device and is not designed to drive high-current loads.
This transistor is made out of n-type semiconductors, with the length of the p-type material controlled to help fix the intrinsic standoff ratio parameter (). Emitter, base, and collector are the three terminals on a typical 2n2646 UJT.
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