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MMSZ5245C

Public Made by Adom

by adom

Changjing Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MMSZ5245C

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5245c.step / mmsz5245c.glb are 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, 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