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MMSZ5221B_R1_00001

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

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MMSZ5221B_R1_00001

PANJIT International · Zener Diodes · SOD-123

MMSZ5221B_R1_00001 from PANJIT International, 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 surface-mount silicon zener diode, labeled as pin 1 in the datasheet pinout ("1 2 / Cathode Anode").
2 Anode passive Anode terminal of the surface-mount silicon zener diode, labeled as pin 2 in the datasheet pinout ("1 2 / Cathode Anode").

Key specifications

Parameter Value
Manufacturer PANJIT International
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 at IZT (nominal, min, max) 2.28 2.4 2.52 V IZT = 20 mA 2
Max Zener impedance at IZT Z ZT 30 Ω IZT = 20 mA 2
Max Zener impedance at IZK Z ZK 1200 Ω IZK = 0.25 mA 2
Max reverse leakage current I R 100 μA VR = 1 V 2
Total power dissipation PD 500 mW Notes A 1
Operating junction and storage temperature range TJ -55 150 °C Operating junction and storage temperature range 1
Typical thermal resistance, junction to ambient RθJA 430 °C/W Notes A (printed position; see review_required) 1
Typical thermal resistance, junction to ambient RθJA 325 °C/W Notes B (printed position; see review_required) 1

CAD (KiCad official)

  • Symbol: MMSZ5221B_R1_00001
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5221b-r1-00001-etched.step / mmsz5221b-r1-00001-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5221b-r1-00001.step / mmsz5221b-r1-00001.glb are the bare package body.

Provenance

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

  • Datasheet: PANJIT International datasheet (6 pp, sha256 2a8e3214f99d873e, retrieved 2026-10-15, 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