BC556 Transistor Pinout, Equivalent

This article is about BC556 transistor pinout, equivalent, specifications, uses, and more details about this bipolar junction transistor. This is a general-purpose features transistor so, it can be used in a variety of general switching and amplification circuits. The collector-emitter voltage of BC556 is -65V therefore it can be used to drive loads up to -65V DC. This transistor is manufactured in three different part numbers BC556A, BC556B, and BC556C. The ending alphabet A show that the HFE value will be 110~220, the Ending alphabet B shows that the HFE value will be 200~450, and the ending alphabet C determined that the HFE value will be 420~800.

BC556 Transistor pinout diagram

BC556 Pin Configuration is given below in the diagram.

BC556 Transistor pinout, Features, alternate, and complement

Features / Technical Specifications

  • Transistor Type: PNP
  • Package Type: TO-92
  • Collector Current(IC) Max: -100mA
  • Collector-Emitter Voltage (VCE) Max: -65V
  • Collector-Base Voltage (VCB) Max: -80V
  • Emitter-Base Voltage (VBE) Max: -5V
  • Collector Dissipation (Pc) Max: 500 Milliwatt
  • Transition Frequency (fT) Max: 100 MHz
  • Min and Max DC Current Gain (hFE): 110 to 800
  • Maximum Storage and Operating temperature Should be: -65 to +150Centigrade

NPN Complementary of BC556 transistor

NPN Complementary of BC556 is BC546, BC547, BC548, BC549 and BC550.

Replacement and Equivalent

You can replace BC556 trnsistor with BC557, BC558, BC559, 2SA1016, 2SA1017, 2SA1082, BC880, BC879, BC490, 2N5821, 2N4403, A1015, A733, 2n2907 and BC327. The pin configuration of the alternate transistor may different from the BC556 transistor, so please must check the pin detail before using it instead of BC556.

SMD Version of BC556 transistor

The SMD version of the BC556 transistor is BC856 (SOT-23) and BC856W (SOT-323). These SMD transistors are of the same type and have similar parameters.

Applications of BC556 Transistor

  • BC556 transistors can be employed in H- Bridge circuits.
  • Transistor BC556 can also be employed in current mirror circuits.
  • It finds applications in linear amplifiers.
  • 556 is also used for impedance buffering.
  • It is deployed for switching applications.
  • BC556 can be used for designing Bistable multivibrators.
  • Employed for an Astable vibrator.
  • It finds application in oscillator circuits.
  • It is also used in comparator circuits.