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MM5Z3V9B

Public Made by Adom

by adom

ST Semtech Zener Diodes, SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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MM5Z3V9B

ST Semtech · Zener Diodes · SOD-523

MM5Z3V9B from ST Semtech, in a SOD-523. 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 Cathode passive Cathode of the planar Zener diode; the cathode is identified by the cathode line in the SOD-523 marking.
2 Anode passive Anode of the planar Zener diode in the 2-lead SOD-523 surface-mount package.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package SOD-523
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
Power Dissipation Ptot 200 mW Absolute Maximum Ratings, Ta = 25 OC 1
Junction Temperature Tj 150 ℃ Absolute Maximum Ratings, Ta = 25 OC 1
Storage Temperature Range TStg -55 150 ℃ Absolute Maximum Ratings, Ta = 25 OC 1
Thermal Resistance Junction to Ambient Air RthA 635 ℃/W 1
Forward Voltage VF 0.9 V at IF = 10 mA 1
Zener Voltage Range (MM5Z3V9B) VZT 3.89 4.16 V at lZT = 5 mA; VZ tested with pulses (20 ms) 2
Dynamic Impedance (MM5Z3V9B) ZZT 100 Ω at lZT = 5 mA; measured with very small AC current signal 2
Reverse Leakage Current (MM5Z3V9B) IR 5 μA at VR = 1 V 2

CAD (KiCad official)

  • Symbol: MM5Z3V9B
  • Footprint: Diode_SMD:D_SOD-523
  • 3D model: SOD-523 (KiCad packages3D, STEP)
  • 3D model files: mm5z3v9b-etched.step / mm5z3v9b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm5z3v9b.step / mm5z3v9b.glb are the bare package body.

Provenance

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

  • Datasheet: ST Semtech datasheet (3 pp, sha256 5acd252c61e6c21f, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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