component
MM1W91
Public Made by Adomby adom
MDD（Microdiode Electronics） Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdownMM1W91
MDD（Microdiode Electronics） · Zener Diodes · SOD-123
MM1W91 from MDD（Microdiode Electronics）, 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MDD（Microdiode Electronics） |
| 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 | 86 | 91 | 96 | V | at IZT=2.8mA, pulse 20 ms | 2 |
| Test Current | IZT | 2.8 | mA | 2 | |||
| Dynamic Impedance | ZZT | 250 | Ω | at IZT | 2 | ||
| Reverse Current | IR | 1 | µA | at VR=69V | 2 | ||
| Admissible Zener Current | IZM | 10 | mA | 2 | |||
| Forward Voltage | VF | 1.2 | V | IF=10mA | 1 | ||
| Power Dissipation | Pd | 1 | W | Ta=25℃ | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 300 | ℃/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper area pads | 1 | ||
| Junction Temperature | Tj | -55 | 150 | ℃ | 1 | ||
| Storage Temperature Range | Tstg | -55 | 150 | ℃ | 1 | ||
| Zener Voltage Tolerance | -5 | 5 | % | approximately | 1 |
CAD (KiCad official)
- Symbol:
MM1W91 - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mm1w91-etched.step/mm1w91-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm1w91.step/mm1w91.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MDD（Microdiode Electronics） datasheet (3 pp, sha256
c57231a6b7e96264, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).