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UDZSTE-1720B - ROHM Semiconductor

Description: ROHM UDZSTE-1720B Zener Diode, 20V 2% 0.2 W SMT 2-Pin SOD-323F

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PCB Footprints
UDZSTE-1720B - ROHM Semiconductor PCB footprint - Small Outline Diode Flat Lead - Small Outline Diode Flat Lead - SOD-323
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3D Models
UDZSTE-1720B - ROHM Semiconductor  - 3D model - Small Outline Diode Flat Lead - SOD-323
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UDZSTE-1720B Details

  • Manufacturer Part Number:

    UDZSTE-1720B

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    End Of Life

  • Part Package Code:

    SC-76

  • Pin Count:

    2

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.10.00.50

  • Manufacturer:

    ROHM Semiconductor

  • YTEOL:

    1

  • Additional Feature:

    HIGH RELIABILITY

  • Configuration:

    SINGLE

  • Diode Element Material:

    SILICON

  • Diode Type:

    ZENER DIODE

  • Dynamic Impedance-Max:

    85 Ω

  • JESD-30 Code:

    R-PDSO-F2

  • JESD-609 Code:

    e1

  • Knee Impedance-Max:

    100 Ω

  • 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:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Polarity:

    UNIDIRECTIONAL

  • Power Dissipation-Max:

    0.2 W

  • Qualification Status:

    Not Qualified

  • Reference Voltage-Nom:

    20 V

  • Reverse Current-Max:

    0.1 µA

  • Reverse Test Voltage:

    15 V

  • Surface Mount:

    YES

  • Technology:

    ZENER

  • Terminal Finish:

    Tin/Silver/Copper (Sn/Ag/Cu)

  • Terminal Form:

    FLAT

  • Terminal Position:

    DUAL

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

    10

  • Voltage Tol-Max:

    2.18%

  • Working Test Current:

    5 mA

UDZSTE-1720B Frequently Asked Questions (FAQs)

  • A 2-layer or 4-layer PCB with a thermal relief pattern and a solid ground plane is recommended. Ensure a minimum of 1mm clearance around the device for heat dissipation.
  • Use a high-quality output capacitor with low ESR (Equivalent Series Resistance) and ensure the input capacitor is rated for the input voltage. Also, ensure the feedback resistors are 1% tolerance or better.
  • The UDZSTE-1720B is rated for operation up to 85°C ambient temperature. However, for reliable long-term operation, it's recommended to keep the ambient temperature below 70°C.
  • While the datasheet recommends a specific inductor value and type, you can use a different inductor as long as it meets the required inductance, saturation current, and DCR (DC Resistance) specifications.
  • Check the PCB layout for noise coupling, ensure the output capacitor is properly sized, and verify the feedback resistors are correctly connected. Also, check for any signs of overheating or excessive current draw.

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UDZSTE-1720B Overview

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