component
MMSZ5255BS-7-F
Public Made by Adomby adom
Diodes Incorporated Zener Diodes, SOD-323. 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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Contents
README
markdownMMSZ5255BS-7-F
Diodes Incorporated · Zener Diodes · SOD-323
MMSZ5255BS-7-F from Diodes Incorporated, 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 | 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 | Diodes Incorporated |
| 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 | VZ | 26.6 | 28 | 29.4 | V | IZT = 4.5mA, TA = +25°C | 2 |
| Test Current | IZT | 4.5 | mA | TA = +25°C | 2 | ||
| Maximum Zener Impedance | ZZT | 44 | Ω | @ IZT = 4.5mA, f = 1KHz | 2 | ||
| Maximum Zener Impedance (knee) | ZZK | 600 | Ω | IZK = 0.25mA, f = 1KHz | 2 | ||
| Maximum Reverse Leakage Current | IR | 0.1 | µA | VR = 21 V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10mA, TA = +25°C | 2 | ||
| Power Dissipation | PD | 200 | mW | Note 7, FR-4 PC board with recommended pad layout | 2 | ||
| Thermal Resistance, Junction to Ambient Air | RθJA | 625 | °C/W | Note 7 | 2 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 150 | °C | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | • Terminals: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over Alloy 42 | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5255BS-7-F - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
mmsz5255bs-7-f-etched.step/mmsz5255bs-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5255bs-7-f.step/mmsz5255bs-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (5 pp, sha256
16d7043292f7e69c, 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).