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MMBZ5229BLT1G

Public Made by Adom

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onsemi Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MMBZ5229BLT1G

onsemi · Zener Diodes · SOT-23

MMBZ5229BLT1G from onsemi, in a SOT-23. 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 ANODE passive Anode terminal of the Zener diode; the datasheet pinout gives pin 1 as Anode for the SOT-23 Style 8 package.
2 NC unconnected No connection; the datasheet lists pin 2 as NC (no connection) on this SOT-23 package.
3 CATHODE passive Cathode terminal of the Zener diode, identified on the package by the polarity band.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
Category Diodes
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Reverse Zener Voltage (Nominal range min) VZ 4.08 4.3 4.52 V @ IZT = 20 mA (pulse test, TA = 25°C, Note 3) 3
Maximum Zener Impedance ZZT 22 Ω @ IZT = 20 mA 3
Maximum Zener Impedance ZZK 2000 Ω @ IZK = 0.25 mA 3
Reverse Leakage Current IR 5 µA @ VR = 1 V 3
Forward Voltage VF 0.9 V @ IF = 10 mA 3
Total Power Dissipation on FR-5 Board PD 225 mW on FR-5 board (Note 1) @ TA = 25°C 1
Total Power Dissipation on Alumina Substrate PD 300 mW on alumina substrate (Note 2) @ TA = 25°C 1
Thermal Resistance, Junction-to-Ambient RθJA 556 °C/W FR-5 board (Note 1) 1
Thermal Resistance, Junction-to-Ambient RθJA 417 °C/W alumina substrate (Note 2) 1
Junction and Storage Temperature Range TJ, Tstg -65 150 °C 1

CAD (KiCad official)

  • Symbol: MMBZ5229BLT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbz5229blt1g-etched.step / mmbz5229blt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbz5229blt1g.step / mmbz5229blt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (7 pp, sha256 1798d76cbb69050c, retrieved 2026-10-18, 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