component
MMSZ4705
Public Made by Adomby adom
Changjing Zener Diodes, SOD-123. 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
markdownMMSZ4705
Changjing · Zener Diodes · SOD-123
MMSZ4705 from Changjing, in a SOD-123. 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 | K | passive | Cathode, the banded end of the SOD-123 body and the bar side of the zener symbol; it goes positive in reverse zener operation (VZ 17.10 V min, 18 V nom, 18.90 V max at IZT = 50 µA for MMSZ4705). |
| 2 | A | passive | Anode, the unbanded end of the SOD-123 body and the triangle side of the zener symbol; forward voltage VF is 0.9 V at IF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Operation Junction and Storage Temperature Range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Power Dissipation | PD | 350 | mW | Device mounted on ceramic PCB; 5.0mm×7.0mm with pad areas 35 mm2 | 1 | ||
| Forward voltage | VF | 0.9 | V | @IF =10mA | 1 | ||
| Thermal Resistance, Junction to Ambient Air | RθJA | 357 | ℃/W | Device mounted on ceramic PCB; 5.0mm×7.0mm with pad areas 35 mm2 | 1 |
CAD (KiCad official)
- Symbol:
MMSZ4705 - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz4705-etched.step/mmsz4705-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz4705.step/mmsz4705.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
70f51aea6c7fa28d, retrieved 2026-10-18, 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).