ZTX951: Overview,Specifications,Main uses,Features,application fields,working principle and alternative models


ZTX951 Overview:

The ZTX951 is a bipolar junction transistor (BJT) with specific characteristics suitable for various electronic applications. This transistor is known for its high voltage ratings and other features making it useful in circuits where high-voltage amplification or switching is required. Here is an overview of the ZTX951 transistor:



  • Type: NPN Bipolar Junction Transistor (BJT)
  • Package: TO-92 (commonly used package)
  • Collector-Base Voltage (VCBO): Typically around 300V
  • Collector-Emitter Voltage (VCEO): Approximately 300V
  • Emitter-Base Voltage (VEBO): Usually in the range of 5V
  • Collector Current (IC): Varies, often in the range of a few hundred mA
  • Power Dissipation (Pd): Depends on operating conditions
  • DataSheet

    ZTX951 PDF

Main Uses:

  • High-Voltage Amplification: Suitable for amplification of high-voltage signals.
  • Switching Applications: Used in circuits where high-voltage switching is necessary.
  • Power Regulation: Employed in power supply regulation circuits.
  • Electronic Control Systems: Found in various electronic control circuits.


  • High Voltage Ratings: Capable of handling relatively high voltages in electronic circuits.
  • NPN Configuration: Configured as an NPN transistor.
  • TO-92 Package: Common package type that enables easy mounting.
  • General-Purpose: Versatile transistor suitable for a range of electronic applications requiring high voltage handling.

Application Fields:

  • Power Supplies: Used in power supply circuits for regulation and control.
  • Audio Amplification: Found in audio amplifier stages requiring high voltage amplification.
  • Switching Circuits: Utilized in high-voltage switching applications.
  • Control Systems: Integrated into electronic control systems for various functions.

Working Principle:

  • In an electronic circuit, the ZTX951 transistor acts as an amplifier or a switch depending on its configuration.
  • In amplification, it amplifies small input signals to larger output signals.
  • In switching applications, it controls the flow of current in a circuit based on the input signals.

Alternative Models:

  • ZTX651: A similar high-voltage NPN transistor from Diodes Inc. with comparable specifications.
  • ZTX1053A: Another alternative with high-voltage capabilities from Diodes Inc.
  • MJE350: A complementary high-voltage NPN transistor that may serve similar functions.


  • The ZTX951 transistor is a crucial component in circuits requiring high-voltage capabilities for amplification or switching.
  • Refer to the datasheet and manufacturer specifications for detailed information on the transistor's characteristics and operating parameters.

The ZTX951 NPN transistor, with its high-voltage ratings, is valuable for applications where high-voltage amplification and switching are essential, making it a versatile component in power supplies, audio amplifiers, switching circuits, and electronic control systems that demand high-voltage handling capacities.