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MMBZ5252B
Public Made by Adomby adom
Changjing Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMMBZ5252B
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz5252b.step/mmbz5252b.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).