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UDZ4V3B-7

Public Made by Adom

by adom

Diodes Incorporated Zener Diodes, SOD-323. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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UDZ4V3B-7

Diodes Incorporated · Zener Diodes · SOD-323

UDZ4V3B-7 from Diodes Incorporated, in a SOD-323. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOD-323
Category Diodes
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Zener Voltage Range (UDZ4V3B, marking B9) VZT 4.17 4.43 V @ IZT = 5 mA; short-duration pulse (Note 7) 2
Maximum Zener Impedance ZZT 100 Ω @ IZT = 5 mA (Note 8) 2
Maximum Zener Impedance ZZK 1000 Ω @ IZK = 1.0 mA (Note 8) 2
Maximum Reverse Current IR 5 uA @ VR = 1.0 V 2
Power Dissipation (Note 6) PD 200 mW Part mounted on FR-4 PC board with recommended pad layout (Note 6) 2
Operating and Storage Temperature Range TJ, TSTG -65 150 °C 2
Thermal Resistance Junction to Ambient Air (Note 6) RθJA 625 °C/W Part mounted on FR-4 PC board with recommended pad layout (Note 6) 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminal Connections: Cathode Band  Terminals: Finish, Matte Tin Annealed over Alloy 42 1

CAD (KiCad official)

  • Symbol: UDZ4V3B-7
  • Footprint: Diode_SMD:D_SOD-323
  • 3D model: SOD-323 (KiCad packages3D, STEP)
  • 3D model files: udz4v3b-7-etched.step / udz4v3b-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); udz4v3b-7.step / udz4v3b-7.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (6 pp, sha256 c334c8f1010fae03, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF