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.
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CJSMF12A
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).
# CJSMF12A
**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.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjsmf12a.step` / `cjsmf12a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](docs/cjsmf12a-datasheet.pdf) (5 pp, sha256 `0e3445de771b166a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/cjsmf12a-datasheet.pdf)