2N2646 is a TO-92 packaged UJT (Unijunction Transistor) that can be used in timing, pulse generation, and triggering circuits. It is commonly used for relaxation oscillators, SCR/triac triggering, and sawtooth waveform generation. For using it as a trigger device, it can operate with low current and is mainly designed for generating sharp pulses rather than driving heavy loads.
Specification/Features :
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Type: UJT (Unijunction Transistor)
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Package: TO-92
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Typical Applications: Relaxation oscillator, pulse generator, triggering circuits
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Peak Emitter Current (Ip): around 50mA (varies by manufacturer)
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Peak Point Emitter Voltage (Vp): depends on intrinsic stand-off ratio (η)
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Intrinsic Stand-off Ratio (η): typically 0.56 to 0.75
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Power Dissipation: low power device, depends on operating conditions
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Best Use: Timing circuits, SCR/triac gate triggering, waveform generation
Package Includes:
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1 x 2N2646 UJT Transistor (TO-92)