component
AD-MMSZ5254B
Public Made by Adomby adom
Changjing Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 9d ago |
| viewers | 9d ago |
| ad-mmsz5254b-etched.glb | 9d ago |
| ad-mmsz5254b-etched.step | 9d ago |
| ad-mmsz5254b-hero.glb | 9d ago |
| ad-mmsz5254b-hero.overlay.json | 9d ago |
| ad-mmsz5254b.glb | 9d ago |
| ad-mmsz5254b.kicad_mod | 9d ago |
| ad-mmsz5254b.kicad_sym | 9d ago |
| ad-mmsz5254b.lbr | 9d ago |
| ad-mmsz5254b.step | 9d ago |
| package.json | 9d ago |
| page.json | 9d ago |
| README.md | 9d ago |
AD-MMSZ5254B
Changjing · Zener Diodes · SOD-123
AD-MMSZ5254B 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/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal, 5254B row) | VZ | 25.65 | 27 | 28.35 | V | @ IZT = 5.0 mA; pulses TP ≤ 1.0 ms | 2 |
| Maximum Zener impedance | ZZT | 41 | Ω | @ IZT = 5.0 mA; f = 1 kHz | 2 | ||
| Maximum Zener impedance (knee) | ZZK | 600 | Ω | @ IZK = 0.25 mA; f = 1 kHz | 2 | ||
| Maximum reverse current | IR | 0.1 | µA | @ VR = 21 V | 2 | ||
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 1 | ||
| Power dissipation | PD | 350 | mW | 1 | |||
| Thermal resistance, junction to ambient | RθJA | 357 | °C/W | Device mounted on ceramic PCB 7.6 mm x 9.4 mm x 0.87 mm, pad area 25 mm2 | 1 | ||
| Operating junction and storage temperature range | Tj, Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
AD-MMSZ5254B - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
ad-mmsz5254b-etched.step/ad-mmsz5254b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad-mmsz5254b.step/ad-mmsz5254b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (7 pp, sha256
04cf450a7cb1567c, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).