component
SMCJ78CA
Public Made by Adomby adom
JUXING Electrostatic And Surge Protection (TVS/ESD), SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 11d ago |
| viewers | 11d ago |
| package.json | 11d ago |
| page.json | 11d ago |
| README.md | 11d ago |
| smcj78ca-etched.glb | 11d ago |
| smcj78ca-etched.step | 11d ago |
| smcj78ca-hero.glb | 11d ago |
| smcj78ca-hero.overlay.json | 11d ago |
| smcj78ca.glb | 11d ago |
| smcj78ca.kicad_mod | 11d ago |
| smcj78ca.kicad_sym | 11d ago |
| smcj78ca.lbr | 11d ago |
| smcj78ca.step | 11d ago |
SMCJ78CA
JUXING · Electrostatic And Surge Protection (TVS/ESD) · SMC
SMCJ78CA from JUXING, in a SMC. 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 | Cathode | passive | Cathode terminal (for the bidirectional SMCJ78CA either terminal can be the more positive, and the datasheet pinning table lists pin 1 as Cathode). |
| 2 | Anode | passive | Anode terminal (for the bidirectional SMCJ78CA either terminal can be the more positive, and the datasheet pinning table lists pin 2 as Anode). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JUXING |
| Package | SMC |
| 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 | 78 | V | 2 | |||
| Breakdown Voltage | VBR | 86.7 | 95.8 | V | @ IT = 1 mA | 2 | |
| Test Current | IT | 1 | mA | 2 | |||
| Maximum Clamping Voltage | VC | 126 | V | @ IPP = 11.9 A | 2 | ||
| Peak Pulse Current | IPP | 11.9 | A | 2 | |||
| Maximum Reverse Leakage | IR | 1 | µA | @ VRWM | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 1500 | W | TA=25°C, Tp=1mS (Note 1) | 1 | ||
| Operating Junction and Storage Temperature Range | Tj, TSTG | -55 | 150 | °C | 1 | ||
| Temperature Coefficient of VBR | αT | 0.1 | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ-25)) | 1 |
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 | terminal fnish material is tin(Sn) (IPC/JEDEC J-STD-609A.01) | 1 |
CAD (KiCad official)
- Symbol:
SMCJ78CA - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
smcj78ca-etched.step/smcj78ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smcj78ca.step/smcj78ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JUXING datasheet (4 pp, sha256
89b71ea86056c8ba, 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).