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MM1W20

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

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MM1W20

Shandong Jingdao Microelectronics · Zener Diodes · SOD-123

MM1W20 from Shandong Jingdao Microelectronics, 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 Cathode passive Cathode terminal of the Zener diode, assigned to pin 1 in the PINNING table for the SOD-123 package.
2 Anode passive Anode terminal of the Zener diode, assigned to pin 2 in the PINNING table for the SOD-123 package.

Key specifications

Parameter Value
Manufacturer Shandong Jingdao Microelectronics
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 20 V) VZT 19 20 21.2 V at IZT = 13 mA; VZT tested with pulses (20 ms) 2
Dynamic impedance ZZT 22 Ω at IZT = 13 mA 2
Reverse current IR 5 μA at VR = 15 V 2
Admissible Zener current IZM 47 mA 2
Total power dissipation PD 1 W at TL = 75°C 1
Operating and storage temperature range Tj, Tstg -55 150 °C operating and storage 1
Thermal resistance, junction to ambient RθJA 300 °C/W junction to ambient, PCB with 2.0" x 2.0" (5 x 5 cm) copper pads 1

CAD (KiCad official)

  • Symbol: MM1W20
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mm1w20-etched.step / mm1w20-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm1w20.step / mm1w20.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Shandong Jingdao Microelectronics datasheet (3 pp, sha256 013135782e49243c, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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