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MM1Z20B

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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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MM1Z20B

Shandong Jingdao Microelectronics · Zener Diodes · SOD-123

MM1Z20B 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; the datasheet's pinning table lists pin 1 as Cathode for the SOD-123 package.
2 Anode passive Anode terminal of the Zener diode; the datasheet's pinning table lists pin 2 as Anode 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 (VZT) VZT 19.6 20 20.4 V at IZT = 5 mA; tested with pulses (20 ms) 2
Maximum dynamic impedance (ZZT) ZZT 50 Ω at IZT = 5 mA 2
Zener voltage tolerance -2 2 % approximately ±2% (per FEATURES) 1
Total power dissipation (Ptot) Ptot 500 mW Ta = 25 °C 1
Operating and storage temperature range Tj, Tstg -55 150 °C Ta = 25 °C 1
Typical thermal resistance, junction to ambient RθJA 340 °C/W junction to ambient; PCB mounted with 2.0" x 2.0" (5 x 5 cm) copper pads 1

CAD (KiCad official)

  • Symbol: MM1Z20B
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mm1z20b-etched.step / mm1z20b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm1z20b.step / mm1z20b.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 b0fd93ec2c97a609, retrieved 2026-10-19, 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