BC858B Transistor is a general-purpose PNP junction transistor (BJT) designed for low-power switching and amplification in surface-mount applications. Packaged in a compact SOT-23 case, it offers moderate current handling, good gain, and is widely used in signal processing, control circuits, and consumer electronics.
Key Features:
- PNP Polarity: Complements NPN devices like BC848 for push-pull configurations.
- Low Collector-Emitter Voltage: Maximum VCE of 30V.
- Decent Current Handling: Supports continuous collector current up to 100mA.
- Good Power Dissipation: Rated up to 300mW total power at 25°C ambient.
- Surface-Mount Package: Space-saving SOT-23 for high-density PCB layouts.
Technical Specifications:
- Type: PNP BJT
- Collector-Emitter Voltage (VCE): -30V
- Collector Current (IC): -100mA (max)
- Total Power Dissipation: 300mW
- DC Current Gain (hFE): 200 – 450 (at IC = 2mA)
- Transition Frequency (fT): 100MHz (typical)
- Package: SOT-23
- Mounting: Surface Mount (SMT)
Pin Configuration (SOT-23):
- Pin 1: Base
- Pin 2: Emitter
- Pin 3: Collector
Schematic Diagram, Connection, Wiring and Pinout:
- Configuration: Common emitter is most commonly used for amplification.
- Wiring: Base connected via bias resistor, emitter to ground or negative rail.
- Symbol: PNP transistor symbol with emitter arrow pointing toward base.
Datasheet and Documentation:
- Download BC858B Transistor Datasheet (PDF)
Applications:
- Signal Switching: Suitable for low-power analog and digital signal control.
- Amplification: Used in low-frequency preamplifier and audio stages.
- Logic Level Shifting: Acts as a level converter in interfacing applications.
- Push-Pull Circuits: Complements BC848 in Class B or AB configurations.
- Mobile & Portable Devices: Compact size ideal for handheld electronics.
Equivalent Models:
- BC856B: Similar PNP transistor with slightly lower hFE range
- MMBT2907A: General-purpose PNP in SOT-23 with higher current rating
- S9012: Economical PNP surface mount transistor for similar applications
Package Includes:
- 1 x BC858B Transistor 3K PNP 30V 100mA 300mW SOT-23
Additional information
Weight | .1 g |
---|---|
PACKAGE | SOT-23 |
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