component
CJSMF12A
Public Made by Adomby adom
Changjing ESD 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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README
markdownCJSMF12A
Changjing · ESD And Surge Protection (TVS/ESD) · SOD-123FL
CJSMF12A 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 by the cathode band on the uni-directional CJSMF12A, which has VRWM 12V, breakdown 13.35-14.69V at 1mA and max clamping voltage 19.7V at 10.1A. |
| 2 | A | passive | Anode of the uni-directional CJSMF12A TVS diode, the end opposite the cathode band, with 200W peak pulse power on a 10/1000us waveform. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power dissipation | PPPM | 200 | W | with a 10/1000us waveform | 1 | ||
| Power dissipation | PD | 1 | W | On infinite heat sink at TL=75℃ | 1 | ||
| Peak forward surge current | IFSM | 20 | A | 8.3 ms single half sine-wave uni-directional only (note 2) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Maximum instantaneous forward voltage | VF | 3.5 | V | at 25A for uni-directional only | 1 | ||
| Thermal resistance junction to lead | RθJL | 100 | ℃/W | junction to lead TL=50℃ | 1 | ||
| Thermal resistance junction to ambient | RθJA | 200 | ℃/W | junction to ambient TA=25℃ | 1 | ||
| Breakdown voltage | VBR | 13.35 | 14.69 | V | @IT=1 mA | 2 | |
| Max reverse leakage | IR | 5 | uA | @VRWM | 2 | ||
| Max clamping voltage | Vc | 19.7 | V | @Ipp | 2 | ||
| Max peak pulse current | IPP | 10.1 | A | 2 | |||
| Reverse standoff voltage | VRWM | 12 | V | 2 | |||
| Test current | IT | 1 | mA | 2 |
CAD (KiCad official)
- Symbol:
CJSMF12A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
cjsmf12a-etched.step/cjsmf12a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cjsmf12a.step/cjsmf12a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
0e3445de771b166a, 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).