BC558 Transistor PNP 30V 100mA 300mW TO-92

BC558 Transistor PNP 30V 100mA 300mW TO-92 is a general-purpose low-power PNP bipolar junction transistor used in switching and amplification applications. It offers high gain, low noise, and is widely employed in signal processing, audio preamps, and hobbyist circuits.

Key Features of BC558 Transistor:

• • PNP Type: Suitable for negative polarity switching applications.
  • Low Power Consumption: Max collector current up to 100mA.
  • High DC Gain: hFE up to 800 (depending on subtype A/B/C).
  • Compact Package: TO-92 plastic casing ideal for PCB mounting.
  • Low Saturation Voltage: Ensures efficient switching performance.

Technical Specifications of BC558 Transistor:

• • Transistor Type: PNP
  • Collector-Emitter Voltage (Vce): -30V
  • Collector-Base Voltage (Vcb): -30V
  • Emitter-Base Voltage (Veb): -5V
  • Collector Current (Ic): -100mA
  • Power Dissipation (Ptot): 300mW
  • DC Current Gain (hFE): 110 to 800
  • Transition Frequency (fT): 150MHz
  • Package: TO-92

Mechanical Characteristics of BC558 Transistor:

• • Package Type: TO-92 (Epoxy)
  • Pin Configuration: Emitter, Base, Collector (flat side facing front: E-B-C)
  • Dimensions: Approx. 4.5mm × 4.0mm × 5.0mm (excluding leads)
  • Weight: ~0.2g
  • Lead Spacing: Standard 2.54mm for breadboard compatibility

Schematic Diagram and Pinout of BC558 Transistor:

• • Pin 1: Emitter
  • Pin 2: Base
  • Pin 3: Collector
  • Operation Notes:
    • Use a base resistor to limit current and protect the transistor
    • Connect emitter to negative rail (GND) for standard PNP configuration

Applications of BC558 Transistor:

• • Signal Amplification: In low-power audio and RF circuits
  • Switching Circuits: Suitable for small load switching
  • Sensor Interface: As signal inverter or buffer
  • Analog Signal Processing: In mixers, preamplifiers
  • Hobby Projects: Common in basic electronics kits and breadboard circuits

Equivalent Models of BC558 Transistor:

• • BC556: Lower noise version with similar specs
  • 2N2907: General-purpose PNP alternative with higher current handling

Datasheet:

• • Download BC558 Transistor Datasheet (ON Semiconductor)

Keywords for BC558 Transistor:

• • BC558 PNP Transistor
  • BC558 TO-92 Amplifier
  • Low Noise PNP BJT
  • General Purpose Switching Transistor
  • 30V 100mA Transistor

Package Includes:

• • 1 x BC558 PNP Transistor (TO-92 Package)