component
SM4F48A
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech ESD And Surge Protection (TVS/ESD), 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
markdownSM4F48A
Yangzhou Yangjie Elec Tech · ESD And Surge Protection (TVS/ESD) · SOD-123
SM4F48A 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 terminal, marked by the band on the uni-directional SM4F48A; connect to the protected line, with VRWM 48.0 V and breakdown 53.30 V to 58.90 V at 1 mA. |
| 2 | A | passive | Anode terminal, the unmarked end of the uni-directional SM4F48A; typically connected to ground, with clamping voltage 77.4 V max at IPP 5.16 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOD-123 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak power dissipation | PPPM | 400 | W | with a 10/1000us waveform | 1 | ||
| Power dissipation, on infinite heat sink | PD | 0.8 | W | TL=75℃ | 1 | ||
| Peak forward surge current | IFSM | 30 | A | 8.3 ms single half sine-wave, unidirectional only (3) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Breakdown voltage | VBR | 53.3 | 58.9 | V | IT = 1 mA | 3 | |
| Maximum reverse leakage current | IR | 1 | μA | @ VRWM = 48.0 V | 3 | ||
| Maximum reverse surge current | IPP | 5.16 | A | Surge current waveform per Fig. 2 and derated per Fig. 3 (note 2) | 3 | ||
| Maximum clamping voltage | VC | 77.4 | V | @ IPP | 3 | ||
| Thermal resistance, junction to lead | RθJL | 26 | ℃/W | Between junction and lead | 1 | ||
| Thermal resistance, junction to ambient | RθJA | 300 | ℃/W | Between junction and Ambient | 1 | ||
| Thermal resistance, junction to curve | RθJC | 40 | ℃/W | Between junction and Curve | 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 |
|---|---|---|---|---|
| contacts | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SM4F48A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
sm4f48a-etched.step/sm4f48a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm4f48a.step/sm4f48a.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
29379f73d5cbe6ce, 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).