TIP3055: Overview,parameter,Main uses,Features,application fields,working principle and alternative models


TIP3055 Transistor Detailed Introduction:


The TIP3055 is a high-power NPN bipolar junction transistor (BJT) commonly used for medium to high power amplification and switching applications.



  • Collector Current (Ic): Maximum current that can flow through the collector.
  • Collector-Emitter Voltage (Vceo): Maximum voltage between collector and emitter.
  • Power Dissipation (Pd): Maximum power the transistor can handle.
  • DC Current Gain (hFE): Transistor gain at a specific operating point.
  • Transition Frequency (ft): Frequency at which current gain decreases to 1.
  • DataSheet

    TIP3055 PDF

Main Uses:

  • Power Amplification: Used in audio amplifiers and power supplies.
  • Switching Applications: Driving loads like motors, relays, and solenoids.
  • Voltage Regulation: Forming the core of linear voltage regulators.
  • Inverter Circuits: Found in DC to AC converters and UPS systems.


  • High Power Capability: Able to handle significant power levels.
  • TO-218 Package: Commonly housed in a larger package for heat dissipation.
  • Robust Construction: Designed for high-current and high-voltage applications.
  • Medium to High Frequency Capabilities: Suitable for a range of switching frequencies.
  • Thermal Protection: Can dissipate heat effectively when mounted on appropriate heat sinks.

Application Fields:

  • Power Supplies: In linear power supplies and voltage regulators.
  • Audio Amplifiers: Providing power amplification in audio systems.
  • Motor Control: Driving motors and other inductive loads.
  • Industrial Electronics: Used in various power electronics applications.

Working Principle:

  • Amplification: Amplifies current and power from the base to the collector.
  • Switching Operation: Controls the flow of current between collector and emitter.
  • Saturated/Off States: Determines whether the transistor is fully conducting or in cutoff mode.

Alternative Models:

  • MJL21193: High-power NPN transistor with similar characteristics.
  • 2N3773: Another high-power NPN transistor commonly used in power applications.
  • MJL3281A: Complementary high-power PNP transistor for power amplification.

The TIP3055 transistor is a robust and widely used component in power electronics for applications requiring medium to high power amplification and switching capabilities. Alternative models like the MJL21193 and 2N3773 offer similar functionalities with variations in parameters that can suit different design requirements. Consult the datasheets provided by manufacturers for detailed technical specifications and performance characteristics of these transistors.