BC547 transistor pinout

BC547 Transistor pinout datasheet

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BC547B transistor

BC546 / BC547 / BC548 / BC549 / BC550 NPN Epitaxial Silicon Transistor

BC547 is the general purpose NPN Silicon Bipolar junction transistor used to Switching and Amplification. The maximum output current capability is 100ma to drive a load across collector to emitter with 65v DC max. These can be used for switching to small loads like small Relays, LEDs etc and for Audio amplifier and signal amplifier. Widely used in small electronics projects and other low power consumer electronics circuit. This transistor is very popular and widely available.

Pinout of  BC546 / BC547 / BC548 / BC549 / BC550 are Same (CBE)

These NPN general purpose transistors commonly used for Switching and Amplification.

Packaging:  TO-92; SOT54 plastic package


  • Low current (max. 100 mA)
  • Low voltage (max. 65 V).


  • General purpose switching and amplification.
  • Switching and Amplifier
  • High-Voltage: BC546, VCEO = 65 V
  • Low-Noise: BC549, BC550

PNP Complement of BC547 : BC556, BC557, BC558, BC559, BC560(pin CBE) | 2N3406(pin EBC)


  • NPN transistor in a TO-92; SOT54 plastic package. PNP complements: BC556 and BC557.
  • (VCBO ) Collector-Base Voltage
  • BC546 : 80V
  • BC547/BC550 : 50V
  • BC548/549 : 30V
  • Maximum Collector Current (DC) IC : 100 mA (continuous)
  • ICM peak collector current: 200 mA

(VCEO ) Collector-Emitter Voltage

  • BC546 : 65V
  • BC547 / BC550: 45V
  • BC548 / BC549: 30V

(VEBO ) Emitter-Base Voltage

  • BC546 / BC547 : 6V
  • BC548 / BC549 / BC550: 5V
  • PC Collector Power Dissipation: 500 mW
  • TJ Junction Temperature: 150 °C
  • TSTG Storage Temperature Range -65 to +150 °C

BC547 transistor equivalent

BC548, BC549, BC546(Pin CBE), 2N3904 (pin EBC), 2N2222 (Pin EBC)– These transistors can be used at the place of bc547 or other NPN than these transistors also can be used but pinout configuration needs to be checked before use.

BC547 transistor pinout

TO-92 Package


BC547, BC548 transistor Footprint dimension size

bc547 transistor pinout

Image credit- ON semiconductor

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