component
MMSZ5256C-E3-08
Public Made by Adomby adom
Vishay Intertech Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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| mmsz5256c-e3-08-etched.step | 9d ago |
| mmsz5256c-e3-08-hero.glb | 9d ago |
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MMSZ5256C-E3-08
Vishay Intertech · Zener Diodes · SOD-123
MMSZ5256C-E3-08 from Vishay Intertech, 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, marked by the cathode bar on the package; for MMSZ5256C (30 V nominal Zener, ±2 %, 4.2 mA test current) this terminal goes positive in reverse breakdown. |
| 2 | A | passive | Anode terminal at the end opposite the cathode bar; the datasheet gives a maximum VF of 0.9 V at IF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse leakage current | IR | 0.1 | μA | VR = 23 V | 2 | ||
| Dynamic resistance | ZZ | 49 | Ω | IZT1 = 4.2 mA | 2 | ||
| Dynamic resistance (knee) | ZZK | 600 | Ω | IZT2 = 0.25 mA | 2 | ||
| Forward voltage | VF | 0.9 | V | IF = 10 mA | 2 | ||
| Power dissipation | Ptot | 500 | mW | RthJL = 250 K/W | 1 | ||
| Power dissipation | Ptot | 300 | mW | On FR-4 board with recommended soldering footprint | 1 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 1 | ||
| Operating temperature range | Top | -55 | 150 | °C | 1 | ||
| Junction temperature | Tj | 150 | °C | 1 | |||
| Nominal Zener voltage | VZ | 30 | V | IZT1 = 4.2 mA | 2 | ||
| Temperature coefficient of VZ | αVZ | 0.092 | %/°C | 2 | |||
| Thermal resistance junction to lead | RthJL | 250 | K/W | 1 | |||
| Thermal resistance junction to ambient | RthJA | 420 | K/W | According to JEDEC 51-3 on FR-4 board with recommended soldering footprint | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5256C-E3-08 - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5256c-e3-08-etched.step/mmsz5256c-e3-08-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5256c-e3-08.step/mmsz5256c-e3-08.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Vishay Intertech datasheet (6 pp, sha256
19d1a0b9567dac98, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).