component
SMFJ40CA
Public Made by Adomby adom
MSKSEMI 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
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownSMFJ40CA
MSKSEMI · TVS · SOD-123FL
SMFJ40CA from MSKSEMI, 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 | 1 | passive | Terminal 1 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised bidirectional ESD/TVS diode; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 | VRWM | 40 | V | 3 | |||
| Reverse Leakage Current | IR | 1 | uA | @ VRWM | 3 | ||
| Maximum Clamping Voltage | VC | 64.5 | V | @ IPP = 3.1 A | 3 | ||
| Peak Pulse Current | IPP | 3.1 | A | 3 | |||
| Test Current | IT | 1 | mA | 3 | |||
| Maximum Peak Pulse Power Dissipation | PPK | 200 | W | PW 10/1000 μs, TA = 25℃ | 2 | ||
| Maximum Peak Pulse Power Dissipation | PPK | 1000 | W | PW 8/10 μs, TA = 25℃ | 2 | ||
| DC Power Dissipation | PD | 385 | W | @Ta = 25℃, Note 3 | 2 | ||
| Derating above 25℃ | 4 | mW/℃ | Derate above 25℃ | 2 | |||
| Thermal Resistance, Junction to Ambient | RθJA | 325 | ℃/W | Note 3 | 2 | ||
| Thermal Resistance, Junction to Lead | RθJL | 26 | ℃/W | Note 3 | 2 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 150 | ℃ | 2 |
CAD (KiCad official)
- Symbol:
SMFJ40CA - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smfj40ca-etched.step/smfj40ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smfj40ca.step/smfj40ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (6 pp, sha256
f4b19fb53e662eab, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal 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).