component
SMF33A CM
Public Made by Adomby adom
JUXING Electrostatic And Surge Protection (TVS/ESD), SOD-123FL. 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
markdownSMF33A CM
JUXING · Electrostatic And Surge Protection (TVS/ESD) · SOD-123FL
SMF33A CM from JUXING, 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 | Cathode | passive | Cathode of the unidirectional SMF33A TVS diode (marked CM), with 33 V working standoff voltage and 53.3 V maximum clamping voltage at 3.8 A. |
| 2 | Anode | passive | Anode of the unidirectional SMF33A TVS diode, which is normally connected to the ground or return side of the protected line. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JUXING |
| 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 | VBR | 36.7 | 40.6 | V | @ IT = 1 mA | 2 | |
| Reverse leakage current | IR | 1 | μA | @ VRWM | 2 | ||
| Max clamp voltage | VC | 53.3 | V | @ IPP = 3.8 A | 2 | ||
| Peak pulse current | IPP | 3.8 | A | 10/1000 us waveform | 2 | ||
| Working peak reverse voltage | VRWM | 33 | V | 2 | |||
| Test current | IT | 1 | mA | 2 | |||
| Peak pulse power dissipation | PPPM | 200 | W | TA=25°C, 10/1000us (Note 1,2,5, Fig1) | 1 | ||
| Peak forward surge current | IFSM | 20 | A | 8.3ms single half sinewave (Note 3), UNI | 1 | ||
| Steady state power dissipation | PM(AV) | 1 | W | Note 4, TL=75°C | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| Typical thermal resistance | RθJA | 180 | °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 |
|---|---|---|---|---|
| contacts | copper | 2. Mounted on 5mm copper pads to each terminal | 1 |
CAD (KiCad official)
- Symbol:
SMF33A CM - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf33a-cm-etched.step/smf33a-cm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf33a-cm.step/smf33a-cm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JUXING datasheet (4 pp, sha256
3b5a2aa506e6a0b2, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).