component
SM4F33CA
Public Made by Adomby adom
hongjiacheng ESD And Surge Protection (TVS/ESD), SOD-123FL. 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
markdownSM4F33CA
hongjiacheng · ESD And Surge Protection (TVS/ESD) · SOD-123FL
SM4F33CA from hongjiacheng, in a SOD-123FL. 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 | hongjiacheng |
| Package | SOD-123FL |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (unidirectional/bidirectional, SM4F33CA) | VBR | 36.7 | 40.6 | V | @IT (mA) = 1 | 2 | |
| Maximum Clamping Voltage | VC | 53.3 | V | @IPP = 7.5 A | 2 | ||
| Reverse Leakage | IR | 1 | μA | @VRWM 33 V | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 400 | W | 10/1000µs waveform (Note 1) | 1 | ||
| Power Dissipation on Infinite Heat Sink | PM(AV) | 3 | W | TL=75° C | 1 | ||
| Peak Forward Surge Current | IFSM | 40 | A | 8.3ms Single Half Sine Wave (Note 2) | 1 | ||
| Operating junction and Storage Temperature Range | TJ, TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance junction to lead | RθJ-L | 40 | ℃/W | junction to lead, typical | 1 | ||
| Typical thermal resistance junction to ambient | RθJ-A | 180 | ℃/W | junction to ambient, typical | 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 | •Matte tin lead-free Plated •Halogen free and RoHS compliant | 1 |
CAD (KiCad official)
- Symbol:
SM4F33CA - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
sm4f33ca-etched.step/sm4f33ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm4f33ca.step/sm4f33ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (5 pp, sha256
51f1c79e7e4e361a, retrieved 2026-10-21, 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).