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1N4742A - Taiwan Semiconductor

Description: Taiwan Semi 1N4742A Zener Diode, 12V 5% 1 W Through Hole 2-Pin DO-41

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1N4742A - Taiwan Semiconductor - PCB symbol
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PCB Footprints
1N4742A - Taiwan Semiconductor PCB footprint - Diodes, Axial Diameter Horizontal Mounting - Diodes, Axial Diameter Horizontal Mounting - 1N4742A
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3D Models
1N4742A - Taiwan Semiconductor - 3D model - Diodes, Axial Diameter Horizontal Mounting - 1N4742A
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1N4742A Details

  • Manufacturer Part Number:

    1N4742A

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.10.00.50

  • Factory Lead Time:

    12 Weeks

  • Manufacturer:

    Taiwan Semiconductor

  • YTEOL:

    5.85

  • Case Connection:

    ISOLATED

  • Configuration:

    SINGLE

  • Diode Element Material:

    SILICON

  • Diode Type:

    ZENER DIODE

  • Dynamic Impedance-Max:

    9 Ω

  • JEDEC-95 Code:

    DO-41

  • JESD-30 Code:

    O-PALF-W2

  • JESD-609 Code:

    e3

  • Moisture Sensitivity Level:

    1

  • Number of Elements:

    1

  • Number of Terminals:

    2

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -55 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    ROUND

  • Package Style:

    LONG FORM

  • Peak Reflow Temperature (Cel):

    260

  • Polarity:

    UNIDIRECTIONAL

  • Power Dissipation-Max:

    1 W

  • Qualification Status:

    Not Qualified

  • Reference Voltage-Nom:

    12 V

  • Surface Mount:

    NO

  • Technology:

    ZENER

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    WIRE

  • Terminal Position:

    AXIAL

  • Voltage Tol-Max:

    5%

  • Working Test Current:

    21 mA

1N4742A Frequently Asked Questions (FAQs)

  • The recommended operating temperature range for the 1N4742A is -65°C to 175°C, although the datasheet only specifies the electrical characteristics at 25°C.
  • To ensure the 1N4742A can handle the power dissipation, calculate the power dissipation (Pd) using the formula Pd = Vz * Iz, where Vz is the zener voltage and Iz is the zener current. Then, check that the calculated Pd is within the maximum power dissipation rating of 1.5W.
  • The typical dynamic impedance of the 1N4742A is around 20-30 ohms, although this value can vary depending on the operating conditions and the specific application.
  • While the 1N4742A can be used as a voltage regulator, it is not recommended due to its limited power handling capability and relatively high dynamic impedance. A dedicated voltage regulator IC would be a better choice for most applications.
  • To select the correct resistor value, calculate the required resistor value using the formula R = (Vin - Vz) / Iz, where Vin is the input voltage, Vz is the zener voltage, and Iz is the zener current. Then, choose a standard resistor value that is close to the calculated value.

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1N4742A Overview

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1N4742A Alternates

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Part Image 1N4742A Vishay Intertechnologies

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Part Image MSP1N4742AP Microchip Technology Inc

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Part Image 1N4742AG Microsemi Corporation (now Microchip)

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Part Image MQ1N4742APE3 Microsemi Corporation (now Microchip)

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Part Image 1N4742A Bkc Semiconductors Inc

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For a full list of alternate parts for 1N4742A, check out Findchips.com