component

MMBZ5252B

Public Made by Adom

by adom

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

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MMBZ5252B

Changjing · Zener Diodes · SOT-23

MMBZ5252B from Changjing, 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 A passive Anode of the zener diode; the symbol on page 1 shows the diode arrow pointing from pin 1 toward pin 3.
2 NC unconnected Not connected internally; the page 1 symbol shows pin 2 as an isolated terminal with no diode connection.
3 K passive Cathode of the zener diode; the zener voltage VZ of 22.8 V min, 24 V nominal and 25.2 V max for the MMBZ5252B is specified at IZT = 5.2 mA.

Key specifications

Parameter Value
Manufacturer Changjing
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
Zener Voltage VZ 22.8 24 25.2 V IZT = 5.2 mA 2
Maximum Zener Impedance ZZT 33 Ω @ IZT = 5.2 mA, f = 1kHz 2
Maximum Zener Impedance (knee) ZZK 600 Ω IZK = 0.25mA 2
Maximum Reverse Leakage Current IR 0.1 µA VR = 18 V 2
Forward Voltage VF 0.9 V IF = 10mA 1
Power Dissipation PD 300 mW Ta = 25℃ 1
Thermal Resistance Junction to Ambient RθJA 417 ℃/W 1
Junction Temperature Tj 150 ℃ 1
Storage Temperature Range Tstg -55 150 ℃ 1
Test Current IZT 5.2 mA Ta = 25℃ 2

CAD (KiCad official)

  • Symbol: MMBZ5252B
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbz5252b-etched.step / mmbz5252b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbz5252b.step / mmbz5252b.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (5 pp, sha256 aaf766a75da5fd05, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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