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MMBZ5231BLT1G

Public Made by Adom

by adom

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

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MMBZ5231BLT1G

onsemi · Zener Diodes · SOT-23

MMBZ5231BLT1G 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 Zener diode anode; the device is rated for a forward voltage VF of 0.95 V max at IF = 10 mA.
2 NC unconnected No connection; the datasheet lists this pin as NC (no connection) in the Style 8 pinout.
3 Cathode passive Zener diode cathode, marked by the polarity band on the package; the MMBZ5231BLT1G regulates at a nominal VZ of 5.1 V (4.84 V min to 5.36 V max) at IZT = 20 mA.

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 VZ 4.84 5.1 5.36 V @ IZT = 20 mA; pulse test at TA = 25°C (Note 3) 3
Maximum Zener Impedance ZZT 17 Ω @ IZT = 20 mA 3
Maximum Zener Impedance ZZK 1600 Ω @ IZK = 0.25 mA 3
Reverse Leakage Current IR 5 µA @ VR = 2 V 3
Forward Voltage VF 0.9 V @ IF = 10 mA, for all types 3
Total Power Dissipation on FR-5 Board (Note 1) PD 225 mW @ TA = 25°C 1
Total Power Dissipation on Alumina Substrate (Note 2) PD 300 mW @ TA = 25°C 1
Thermal Resistance, Junction-to-Ambient (FR-5 Board, Note 1) RJA 556 °C/W FR-5 board 1
Thermal Resistance, Junction-to-Ambient (Alumina Substrate, Note 2) RJA 417 °C/W Alumina substrate 1
Junction and Storage Temperature Range TJ, Tstg -65 150 °C 1

CAD (KiCad official)

  • Symbol: MMBZ5231BLT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbz5231blt1g-etched.step / mmbz5231blt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbz5231blt1g.step / mmbz5231blt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (6 pp, sha256 50172f59ef317c72, retrieved 2026-10-17, 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