BC549 transistor pinout equivalent datasheet working

BC549 transistor

The BC549 transistor is a widely used NPN bipolar junction transistor (BJT) transistor. It is also used in verity of electronics circuits like bc547 and bc548. It has maximum collector current (Ic) of around 100 mA, a maximum collector-base voltage  of approximately 30 V, and a maximum collector-emitter voltage  of around 30 V these are the key features of BC549.

BC549 transistor

BC549 pinout

Transistor bc549 pin configurations are as follows:

  • Pin1 (Collector): The current supplies throughout the collector terminal
  • Pin2 (Base): The base terminal of this transistor controls the biasing
  • Pin3 (Emitter): Flow of current drains out through this terminal

BC549 Technical features

Features

  • Pacage: Available in To-92
  • Transistor Type: NPN
  • Current Gain (hFE): 420 to 800
  • Max Continuous Collector current (IC): 100mA
  • Max Collector-Emitter voltage (VCEO): 30 V
  • Max Collector-Base voltage (VCB0): 30V
  • Emitter Base Voltage (VBE0): 5V
  • Transition Frequency: 100MHz

Bc549 transistor equivalent

list of some equivalent of 549 are given below but but their pin configuration may differ so before use of any alternate must check the pinout detail.

  • BC547: The BC547 is an NPN transistor in the same family and same features.
  • BC548: Another NPN transistor from the BC series that can be a suitable substitute for the BC549.
  • 2N3904: This is a widely used NPN transistor that can often replace.
  • 2N2222: The 2N2222 is also another popular NPN transistor that can be an equivalent.
  • 2N4401: This NPN transistor is commonly used and has similar specifications to the BC549.

549 transistor working

When a small current is directed to the base of transistor typically around 0.7 volts the base-emitter junction becomes forward-biased. The larger current  flows from the collector to the emitter. It This transistor can also be used as an amplifier, enhancing the strength of weak input signals by controlling the output current with the input current. It is commonly used in amplification circuits. Transistor BC549 can also be used for switching applications in electronics and electrical circuits.

Bc549 transistor datasheet

The datasheet of bc549 is:

Difference Between BC547, BC548 and BC549 Transistor

These all are from BC family transistor and almost similar in features. Some little difference among these are given below. You can use all these as an alternate of each other.

BC547 Transistor BC548 Transistor BC549 Transistor
  • Transistor Type: NPN BJT
  • Collector Current (Ic): Typically around 100 mA
  • Collector-Base Voltage (Vcb): About 50 V
  • Collector-Emitter Voltage (Vce): Typically around 45 V
  • Power Dissipation (Pd): Usually around 625 mW
  • Current Gain (hFE): Typically ranging from 110 to 800
  • Transition Frequency (ft): Typically around 300 MHz2
  • Transistor Type: NPN BJT
  • Collector Current (Ic): Approximately 100 mA
  • Collector-Base Voltage (Vcb): Around 30 V
  • Collector-Emitter Voltage (Vce): Typically 30 V
  • Power Dissipation (Pd): About 625 mW
  • Current Gain (hFE): Usually 110 to 800
  • Transition Frequency (ft): Approximately 150 MHz
  • Transistor Type: NPN BJT
  • Collector Current (Ic): Typically around 100 mA
  • Collector-Base Voltage (Vcb): About 30 V
  • Collector-Emitter Voltage (Vce): Typically around 30 V
  • Power Dissipation (Pd): Usually around 625 mW
  • Current Gain (hFE): Typically ranging from 200 to 800
  • Transition Frequency (ft): Typically around 150 MHz

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