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MM3Z51BW
Public Made by Adomby adom
Shandong Jingdao Microelectronics Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMM3Z51BW
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm3z51bw.step/mm3z51bw.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).