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MM3Z51BW

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by adom

Shandong Jingdao Microelectronics Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MM3Z51BW

Shandong Jingdao Microelectronics · Zener Diodes · SOD-323

MM3Z51BW from Shandong Jingdao Microelectronics, in a SOD-323. 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 gives no separate pin-level limit, and the device is rated at Ptot 300 mW with Tj/Tstg of -55 to +150 °C.
2 Anode passive Anode terminal of the zener diode; the datasheet gives no separate pin-level limit, and the device is rated at Ptot 300 mW with Tj/Tstg of -55 to +150 °C.

Key specifications

Parameter Value
Manufacturer Shandong Jingdao Microelectronics
Package SOD-323
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 (MM3Z51) VZT 48 51 54 V at IZT; VZT tested with pulses (20 ms) 2
Total power dissipation Ptot 300 mW Ta = 25 °C 1
Operating and storage temperature range Tj, Tstg -55 150 °C 1
Typical thermal resistance junction to ambient RθJA 417 °C/W Junction to ambient at P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper areas pads 1

CAD (KiCad official)

  • Symbol: MM3Z51BW
  • Footprint: Diode_SMD:D_SOD-323
  • 3D model: SOD-323 (KiCad packages3D, STEP)
  • 3D model files: mm3z51bw-etched.step / mm3z51bw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm3z51bw.step / mm3z51bw.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 fc26b65eea5b0e47, retrieved 2026-10-22, 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