component
MMSZ5231BT1G-CN
Public Made by Adomby adom
ChipNobo 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
markdownMMSZ5231BT1G-CN
ChipNobo · Zener Diodes · SOD-123
MMSZ5231BT1G-CN from ChipNobo, 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 by the colour band; the Zener voltage is 4.85 V min to 5.36 V max at Izt = 20 mA. |
| 2 | A | passive | Anode; forward voltage is 0.9 V at IF = 10 mA, and power dissipation is limited to 500 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ChipNobo |
| 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 (min) | Vz1(@Izt) | 4.85 | V | Izt = 20 mA | 1 | ||
| Zener voltage (max) | Vz1(@Izt) | 5.36 | V | Izt = 20 mA | 1 | ||
| Zener dynamic impedance (max) | Zzt@Izt | 17 | Ω | Izt = 20 mA | 1 | ||
| Zener knee impedance (max) | Zzk | 1600 | Ω | Izk = 0.25 mA | 1 | ||
| Reverse leakage current (max) | IR | 5 | uA | VR = 2.0 V | 1 | ||
| Power dissipation | Pd | 500 | mW | Device mounted on ceramic PCB 7.6mm x 9.4mm x 0.87mm with pad areas 25mm² | 1 | ||
| Storage temperature range | Ts | -65 | 150 | ℃ | 1 | ||
| Forward voltage | Vf | 0.9 | V | @IF=10mA | 1 | ||
| Thermal resistance, junction-to-ambient | RθJA | 340 | ℃/W | Device mounted on ceramic PCB 7.6mm x 9.4mm x 0.87mm with pad areas 25mm²; measured via infrared scan method | 1 | ||
| Thermal resistance, junction-to-lead | RθJL | 150 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5231BT1G-CN - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5231bt1g-cn-etched.step/mmsz5231bt1g-cn-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5231bt1g-cn.step/mmsz5231bt1g-cn.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ChipNobo datasheet (3 pp, sha256
f6915f822f2dd1c7, 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).