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BD439 - STMicroelectronics

Description: NPN transistor

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Symbol
BD439 - STMicroelectronics - PCB symbol
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PCB Footprints
BD439 - STMicroelectronics PCB footprint - Transistor Outline, Vertical - Transistor Outline, Vertical - SOT-32
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3D Models
BD439 - STMicroelectronics - 3D model - Transistor Outline, Vertical - SOT-32
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BD439 Details

  • Manufacturer Part Number:

    BD439

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SIP

  • Package Description:

    ROHS COMPLIANT PACKAGE-3

  • Pin Count:

    3

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.29.00.95

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    0

  • Case Connection:

    ISOLATED

  • Collector Current-Max (IC):

    4 A

  • Collector-Emitter Voltage-Max:

    60 V

  • Configuration:

    SINGLE

  • DC Current Gain-Min (hFE):

    25

  • JEDEC-95 Code:

    TO-126

  • JESD-30 Code:

    R-PSFM-T3

  • Number of Elements:

    1

  • Number of Terminals:

    3

  • Operating Temperature-Max:

    150 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Peak Reflow Temperature (Cel):

    NOT SPECIFIED

  • Polarity/Channel Type:

    NPN

  • Power Dissipation Ambient-Max:

    36 W

  • Power Dissipation-Max (Abs):

    36 W

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    NO

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Position:

    SINGLE

  • Time@Peak Reflow Temperature-Max (s):

    NOT SPECIFIED

  • Transistor Application:

    SWITCHING

  • Transistor Element Material:

    SILICON

  • Transition Frequency-Nom (fT):

    3 MHz

  • VCEsat-Max:

    0.8 V

BD439 Frequently Asked Questions (FAQs)

  • The recommended operating voltage range for the BD439 is 4.5V to 18V, although it can operate up to 20V with reduced performance.
  • To ensure stable operation in high-temperature environments, it's essential to provide adequate heat sinking, keep the junction temperature (Tj) below 150°C, and follow the recommended thermal design guidelines.
  • The maximum allowed power dissipation for the BD439 is 2W, and it's essential to ensure that the device does not exceed this limit to prevent overheating and damage.
  • Yes, the BD439 can be used as a high-side switch, but it's essential to ensure that the input voltage is within the recommended range and that the device is properly biased to prevent latch-up or other issues.
  • To protect the BD439 from overvoltage and overcurrent conditions, it's recommended to use external protection circuits, such as voltage regulators, current limiters, and TVS diodes, in addition to following proper PCB design and layout guidelines.

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BD439 Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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BD439 Alternates

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Image Part Number Model
Part Image BD439 Samsung Semiconductor

Power Bipolar Transistor, 4A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD439S Fairchild Semiconductor Corporation

Power Bipolar Transistor, 4A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD439 Central Semiconductor Corp

Power Bipolar Transistor, 4A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD439 Crimson Semiconductor Inc

Power Bipolar Transistor, 4A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD439 Fairchild Semiconductor Corporation

Power Bipolar Transistor, 4A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
For a full list of alternate parts for BD439, check out Findchips.com