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MM3Z3B3

Public Made by Adom

by adom

ST Semtech Zener Diodes, SOD-323. 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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MM3Z3B3

ST Semtech · Zener Diodes · SOD-323

MM3Z3B3 from ST Semtech, 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 Cathode passive Cathode of the zener diode (Vz 3.234 to 3.366 V at IZT = 5 mA for MM3Z3B3).
2 A passive Anode of the zener diode (forward voltage max 0.9 V at IF = 10 mA).

Key specifications

Parameter Value
Manufacturer ST Semtech
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 VZT 3.234 3.3 3.366 V at IZT = 5 mA, pulsed 20 ms 2
Dynamic Impedance ZZT 130 Ω at IZT = 5 mA 2
Reverse Leakage Current IR 20 μA at VR = 1 V 2
Forward Voltage VF 0.9 V at IF = 10 mA 1
Thermal Resistance Junction to Ambient Air RθJA 417 °C/W Ta = 25 °C 1
Total Power Dissipation Ptot 300 mW Ta = 25 °C 1
Junction Temperature Tj 150 °C Ta = 25 °C 1
Storage Temperature Range Tstg -55 150 °C Ta = 25 °C 1
Zener Voltage Tolerance -2 2 % 1
Nominal Zener Voltage Vznom 3.3 V at IZT = 5 mA 2

CAD (KiCad official)

  • Symbol: MM3Z3B3
  • Footprint: Diode_SMD:D_SOD-323
  • 3D model: SOD-323 (KiCad packages3D, STEP)
  • 3D model files: mm3z3b3-etched.step / mm3z3b3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm3z3b3.step / mm3z3b3.glb are the bare package body.

Provenance

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

  • Datasheet: ST Semtech datasheet (3 pp, sha256 b9a8f088117b4016, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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