component
MMSZ56T1G
Public Made by Adomby adom
onsemi 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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Contents
README
markdownMMSZ56T1G
onsemi · Zener Diodes · SOD-123
MMSZ56T1G from onsemi, 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 | Cathode | passive | Cathode terminal, indicated by the polarity band on the package (SOD-123 Style 1, pin 1). |
| 2 | Anode | passive | Anode terminal of the Zener diode (SOD-123 Style 1, pin 2). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 Zener Voltage @ IZT1 = 2 mA (MMSZ56T1G, Z4) | VZ1 | 53.2 | 56 | 58.8 | V | @ IZT1 = 2 mA | 3 |
| Reverse Zener Voltage @ IZT2 (MMSZ56T1G, Z4) | VZ2 | 51.5 | 60 | V | @ IZT2 = 0.1 mA | 3 | |
| Maximum Zener Impedance @ IZT1 (MMSZ56T1G) | ZZT1 | 200 | Ω | @ IZT1 = 2 mA; IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 3 | ||
| Maximum Zener Impedance @ IZT2 (MMSZ56T1G) | ZZT2 | 425 | Ω | @ IZT2 = 0.5 mA; IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 3 | ||
| Reverse Leakage Current (MMSZ56T1G) | IR | 0.05 | µA | @ VR = 39.2 V | 3 | ||
| Forward Voltage | VF | 0.9 | V | @ IF = 10 mA | 3 | ||
| Zener voltage standard tolerance on nominal VZ | -5 | 5 | % | Standard tolerance on nominal Zener voltage (Note 6); MMSZ56T1G has no alternate tolerance letter printed | 3 | ||
| Total Power Dissipation on FR-5 Board | PD | 500 | mW | FR-5 board (3.5 x 1.5 in), @ TL = 75°C (Note 1) | 1 | ||
| Derating of Total Power Dissipation | PD | 6.7 | mW/°C | Derated above TL = 75°C | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 340 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Thermal Resistance, Junction-to-Lead | RθJL | 150 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -55 | 150 | °C | 1 |
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 |
|---|---|---|---|---|
| housing | PPA | • ESD Rating of Class 3 (> 16 kV) per Human Body Model • AEC−Q101 Qualified and PPAP Capable | 1 |
CAD (KiCad official)
- Symbol:
MMSZ56T1G - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz56t1g-etched.step/mmsz56t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz56t1g.step/mmsz56t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
4a61e8bedacf2866, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).