component
MMSZ5245C
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
markdownMMSZ5245C
Changjing · Zener Diodes · SOD-123
MMSZ5245C 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 end with the polarity band, which the package drawing marks "−"; the MMSZ5245C has a nominal Zener voltage of 15 V at IZT = 8.5 mA. |
| 2 | A | passive | Anode, the end without the band, which the package drawing marks "+"; the device is rated 350 mW power dissipation and 0.9 V forward voltage 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal 15 V) | VZ | 14.7 | 15 | 15.3 | V | VZ@IZT, IZT = 8.5 mA | 2 |
| Maximum Zener impedance | ZZT | 16 | Ω | @IZT = 8.5 mA | 2 | ||
| Maximum Zener impedance (knee) | ZZK | 600 | Ω | @IZK = 0.25 mA | 2 | ||
| Maximum reverse current | IR | 0.1 | µA | VR = 11 V | 2 | ||
| Power dissipation | Pd | 350 | mW | Note 1: device mounted on ceramic PCB 5.0 mm x 7.0 mm, pad areas 35 mm² | 1 | ||
| Operation junction and storage temperature range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to ambient air | RθJA | 357 | ℃/W | Note 1: device mounted on ceramic PCB 5.0 mm x 7.0 mm, pad areas 35 mm² | 1 | ||
| Forward voltage | VF | 0.9 | V | IF = 10 mA, Note 2: tested with pulses, Tp≤1.0 ms | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5245C - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5245c-etched.step/mmsz5245c-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5245c.step/mmsz5245c.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
a1680ed5f3b8a4eb, retrieved 2026-10-17, 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).