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1N4738A - onsemi

Description: Zener Single Diode, 8.2 V, 1 W, DO-41 (DO-204AL), 2 Pins, 200 °C, Through Hole

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1N4738A - onsemi PCB footprint - Diodes, Axial Diameter Horizontal Mounting - Diodes, Axial Diameter Horizontal Mounting - AXIAL LEAD / DO−41 CASE 017AH ISSUE O_2025
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1N4738A - onsemi  - 3D model - Diodes, Axial Diameter Horizontal Mounting - AXIAL LEAD / DO−41 CASE 017AH ISSUE O_2025
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  • Datasheet Download Datasheet
  • Stock & Prices $ Price & Stock for 1N4738A
  • Part Number 1N4738A
  • Manufacturer onsemi
  • Pin Count 2
  • Part Category Zener Diode
  • Package Category Diodes, Axial Diameter Horizontal Mounting
  • Footprint Name Diodes, Axial Diameter Horizontal Mounting - AXIAL LEAD / DO−41 CASE 017AH ISSUE O_2025
  • Released Date Oct 14, 2025
  • Last Modified Date Oct 14, 2025 10:26 AM UTC
  • Pinout / Pin List Click Here (Member Only)

1N4738A Details

  • Manufacturer Part Number:

    1N4738A

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    Axial Lead / DO-41

  • Pin Count:

    2

  • Manufacturer Package Code:

    017AH

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.10.00.50

  • Manufacturer:

    onsemi

  • YTEOL:

    5.85

  • Case Connection:

    ISOLATED

  • Configuration:

    SINGLE

  • Diode Element Material:

    SILICON

  • Diode Type:

    ZENER DIODE

  • Dynamic Impedance-Max:

    4.5 Ω

  • JEDEC-95 Code:

    DO-41

  • JESD-30 Code:

    O-LALF-W2

  • JESD-609 Code:

    e3

  • Knee Impedance-Max:

    700 Ω

  • Number of Elements:

    1

  • Number of Terminals:

    2

  • Operating Temperature-Max:

    200 °C

  • Operating Temperature-Min:

    -65 °C

  • Package Body Material:

    GLASS

  • Package Shape:

    ROUND

  • Package Style:

    LONG FORM

  • Polarity:

    UNIDIRECTIONAL

  • Power Dissipation-Max:

    1 W

  • Qualification Status:

    Not Qualified

  • Reference Voltage-Nom:

    8.2 V

  • Reverse Current-Max:

    10 µA

  • Reverse Test Voltage:

    6 V

  • Surface Mount:

    NO

  • Technology:

    ZENER

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    WIRE

  • Terminal Position:

    AXIAL

  • Voltage Tol-Max:

    5%

  • Working Test Current:

    31 mA

1N4738A Frequently Asked Questions (FAQs)

  • The recommended operating temperature range for the 1N4738A is -65°C to +175°C.
  • To ensure stable zener operation, the 1N4738A should be biased with a minimum of 1 mA and a maximum of 40 mA, and the voltage across the diode should be within the specified zener voltage range.
  • The maximum power dissipation for the 1N4738A is 1 watt, and it is recommended to derate the power dissipation by 2.5 mW/°C above 25°C.
  • While the 1N4738A can be used as a voltage regulator, it is not recommended as it is not designed for that purpose. The 1N4738A is a zener diode, and its voltage regulation characteristics are not as stable as a dedicated voltage regulator IC.
  • To prevent electrostatic discharge (ESD) damage, it is recommended to handle the 1N4738A with ESD-safe tools and equipment, and to follow proper ESD protection procedures when handling the device.

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1N4738A Overview

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Part Image 1N4738AT50R National Semiconductor Corporation

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Part Image 1N4738A-G Sangdest Microelectronics (Nanjing) Co Ltd

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Part Image 1N4738A-T3 Sangdest Microelectronics (Nanjing) Co Ltd

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