component
SMF4750AQ
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech Zener Diodes, SOD-123. 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
markdownSMF4750AQ
Yangzhou Yangjie Elec Tech · Zener Diodes · SOD-123
SMF4750AQ from Yangzhou Yangjie Elec Tech, 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener voltage (VZ) at IZT | VZ | 25.65 | 27 | 28.35 | V | at IZT (IZT = 9.5 mA, same row) | 2 |
| Maximum dynamic impedance (ZZT) | ZZT | 35 | Ω | at IZT = 9.5 mA | 2 | ||
| Maximum dynamic impedance (ZZK) | ZZK | 750 | Ω | at IZK = 0.25 mA | 2 | ||
| Maximum reverse leakage current | IR | 5 | µA | at test voltage VR = 20.6 V | 2 | ||
| Maximum DC Zener current | IZM | 34 | mA | 2 | |||
| Maximum instantaneous forward voltage | VF | 1.2 | V | @ IF = 200 mA | 1 | ||
| DC power dissipation | PD | 1 | W | at TL = 75 °C | 1 | ||
| Maximum junction temperature | Tj | -55 | 150 | ℃ | 1 | ||
| Storage temperature range | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to lead | RθJ-L | 40 | ℃/W | junction to lead; PCB mounted with 3mm*3mm | 1 | ||
| Thermal resistance, junction to ambient | RθJ-A | 120 | ℃/W | junction to ambient; PCB mounted with 3mm*3mm | 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 | black | 4. Body color: Black | 4 | |
| contacts | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SMF4750AQ - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
smf4750aq-etched.step/smf4750aq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf4750aq.step/smf4750aq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (5 pp, sha256
00de434a5d583083, retrieved 2026-10-18, 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).