BD439 NPN Power Transistor – Datasheet

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The BD439 is silicon epitaxial-base NPN power transistors in Jedec SOT-32 plastic package, intended for use in power linear and switching applications

Power Transistor?

Transistors are three-terminal semiconductor electronic devices that can be used as switches or amplifiers. They can be of NPN or PNP polarity, and many different types are available with different power and switching speed ratings. If a transistor designed to these concepts can handle more than 1 A of collector current, it is generally considered to be a power transistor. Such transistors must have low output resistance to deliver large load currents, and good junction insulation to resist high voltages. They must also dissipate heat very quickly to avoid overheating.

BD439 Pinout

BD439 Pin Configuration

Pin NoPin Name
1Emitter
2Collector
3Base

BD439 Key Features

  • Collector-Emitter Sustaining Voltage –
    • : VCEO(SUS)= 60V(Min)
  • Minimum Lot-to-Lot variations for robust device performance
  • Type Designator: BD439
  • Material of Transistor: Si
  • Polarity: NPN
  • Maximum Emitter-Base Voltage |Veb|: 5 V
  • Package: TO126

BD439 Specification

Ic (mA)Vce (max)Vcb hfe@IcFT
4606020-130103

BD439 Equivalent/Alternate:

  • BD410, BD414, BD433, BD434, BD440

Application

  • Medium Power Linear And Switching
  • General Purpose Amplifier

You can download this datasheet for BD439 NPN Power Transistor from the link given below: