component
SMF250A
Public Made by Adomby adom
Changjing TVS, 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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README
markdownSMF250A
Changjing · TVS · SOD-123FL
SMF250A from Changjing, 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 (marked with the cathode band) of the unidirectional TVS; reverse stand-off voltage VRWM 250V, breakdown 279-309V at 1mA, max clamping 405V at 0.5A IPP. |
| 2 | A | passive | Anode of the unidirectional TVS, opposite the cathode band; 200W peak power with a 10/1000us waveform. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOD-123FL |
| Category | TVS/Fuse/Board Level 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 | VRWM | 250 | V | 2 | |||
| Breakdown voltage | VBR | 279 | 309 | V | @IT = 1 mA | 2 | |
| Maximum clamping voltage | VC | 405 | V | @IPP = 0.5 A | 2 | ||
| Maximum peak pulse current | IPP | 0.5 | A | 2 | |||
| Maximum reverse leakage | IR | 1 | uA | @VRWM | 2 | ||
| Peak power dissipation | PPPM | 200 | W | with a 10/1000us waveform | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| 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 | ||
| Test current | IT | 1 | mA | VBR test current | 2 |
CAD (KiCad official)
- Symbol:
SMF250A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf250a-etched.step/smf250a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf250a.step/smf250a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
150c24d4249959f9, 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).