component
MMSZ5231B-TP
Public Made by Adomby adom
MCC Micro Commercial Components Zener Diodes, SOD-123. 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
markdownMMSZ5231B-TP
MCC Micro Commercial Components · Zener Diodes · SOD-123
MMSZ5231B-TP from MCC Micro Commercial Components, 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 end marked with the cathode band; 5.1V nominal Zener voltage at IZT=20mA (MMSZ5231B, ±5%), 500mW maximum power dissipation. |
| 2 | A | passive | Anode, the end opposite the cathode mark; maximum forward voltage 0.9V at IF=10mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| 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 tolerance (B suffix) | VZ | -5 | 5 | % | B suffix (MMSZ5231B); standard tolerance per note 3 | 2 | |
| Maximum zener impedance | ZZT | 17 | Ω | @ IZT = 20 mA | 2 | ||
| Maximum zener impedance (knee) | ZZK | 1600 | Ω | @ IZK = 0.25 mA | 2 | ||
| Maximum reverse leakage current | IR | 5 | µA | @ VR = 2.0 V | 2 | ||
| Maximum zener voltage temperature coefficient | -0.03 | 0.03 | %/°C | 2 | |||
| Maximum forward voltage | VF | 0.9 | V | IF = 10 mA | 1 | ||
| Power dissipation | PD | 500 | mW | Note 2: mounted on 5.0 mm² land areas | 1 | ||
| Operating junction temperature range | -55 | 150 | °C | 1 | |||
| Storage temperature range | -55 | 150 | °C | 1 | |||
| Thermal resistance, junction to ambient | 340 | °C/W | Note 1: FR-4 board with minimum recommended solder pad layout | 1 | |||
| Nominal zener voltage | VZ | 5.1 | V | @ IZT = 20 mA; measured at 90 s with lead temperature TL = 25°C | 2 |
CAD (KiCad official)
- Symbol:
MMSZ5231B-TP - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5231b-tp-etched.step/mmsz5231b-tp-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5231b-tp.step/mmsz5231b-tp.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MCC Micro Commercial Components datasheet (5 pp, sha256
f9745d802679035f, 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).