Transistor BC251 PNP, 45V, 0.1A, TO-92

Transistor BC251 PNP, 0.1A TO-92

Transistors

Reference: TRBC251

Part.No: BC251

€0.60

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The BC251 is a general-purpose PNP Bipolar Junction Transistor (BJT) in a TO-92 package, rated for 45V / 0.1A. Suitable for small-signal amplification and low-power switching in hobbyist and general-purpose PNP circuits.

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Description
Product Details

BC251 PNP Small Signal Transistor - General Purpose Amplification & Switching

The BC251 is a PNP small-signal transistor in a TO-92 package, rated for 45V and 0.1A, used for low-power amplification and switching where a PNP complement is needed in a circuit design.

Functions & Applications

PNP Polarity: Complements NPN designs, useful for high-side switching and push-pull stages.
Standard TO-92 Package: Through-hole, easy to solder and prototype with on breadboards.
45V / 0.1A Rating: Enough headroom for small relays, LEDs and low-power signal stages.
General-Purpose Design: Suitable for both linear amplification and simple switching tasks.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	45V
Max Collector Current (Ic)	100mA
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What do the A/B/C suffixes on BC251 variants mean?
A: As with most BCxxx series transistors, the suffix letters (A, B, C) denote different hFE (gain) grouping bins from the same base part, not different voltage or current ratings.

Q: Can the BC251 replace an NPN transistor in a circuit?
A: No, the BC251 is a PNP transistor, so it cannot directly replace an NPN part - the circuit polarity (power supply orientation) must be designed for PNP operation.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: PNP
Transistor Case Style: TO-92

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