component
SMFJ33A
Public Made by Adomby adom
BORN TVS, 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
markdownSMFJ33A
BORN · TVS · SOD-123FL
SMFJ33A from BORN, 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 | BORN |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage | VR | 33 | V | 3 | |||
| Breakdown voltage (unidirectional, SMFJ33A) | VBR | 36.7 | 40.6 | V | IT = 1 mA | 3 | |
| Maximum clamping voltage | VC | 53.3 | V | at Ipp 3.8 A | 3 | ||
| Maximum peak pulse current | Ipp | 3.8 | A | 3 | |||
| Maximum reverse leakage current | IR | 1 | uA | at VR | 3 | ||
| Peak pulse power dissipation | PPPM | 200 | W | 10/1000us waveform, non-repetitive (Notes 1,2) | 2 | ||
| Steady state power dissipation | PD | 1 | W | Infinite heat sink at TA=50°C (Note 3) | 2 | ||
| Peak forward surge current | IFSM | 20 | A | 8.3ms single half sine wave or equivalent square wave (Note 4) | 2 | ||
| Maximum instantaneous forward voltage | VFM | 3.5 | V | at 10A (Note 5), unidirectional only | 2 | ||
| Operating junction temperature range | TJ | -55 | 150 | °C | 2 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 2 | ||
| Typical thermal resistance junction to lead | RθJL | 100 | °C/W | 2 | |||
| Typical thermal resistance junction to ambient | RθJA | 220 | °C/W | 2 |
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 | • Lead Finish: Matte Tin • Case Material: Epoxy Molding Compound | 1 |
CAD (KiCad official)
- Symbol:
SMFJ33A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smfj33a-etched.step/smfj33a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smfj33a.step/smfj33a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (7 pp, sha256
dd8422b2bd24ae70, 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).