component
SMCJ40A-TR
Public Made by Adomby adom
STMicroelectronics TVS, SMC. 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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSMCJ40A-TR
STMicroelectronics · TVS · SMC
SMCJ40A-TR from STMicroelectronics, 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SMC |
| 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 leakage current at VRM | IRM | 0.2 | µA | at VRM, 25 °C | 3 | ||
| Reverse leakage current at VRM | IRM | 1 | µA | at VRM, 85 °C | 3 | ||
| Breakdown voltage | VBR | 44.4 | 46.7 | V | at IR = 1 mA | 3 | |
| Stand-off voltage | VRM | 40 | V | 3 | |||
| Clamping voltage 10/1000 µs | VCL | 64.5 | V | 10/1000 µs | 3 | ||
| Peak pulse current 10/1000 µs | IPP | 24 | A | 10/1000 µs | 3 | ||
| Dynamic resistance 10/1000 µs | RD | 0.644 | Ω | 10/1000 µs | 3 | ||
| Clamping voltage 8/20 µs | VCL | 84 | V | 8/20 µs | 3 | ||
| Peak pulse current 8/20 µs | IPP | 119 | A | 8/20 µs | 3 | ||
| Dynamic resistance 8/20 µs | RD | 294 | mΩ | 8/20 µs | 3 | ||
| Voltage temperature coefficient | αT | 10.1 | 10-4/°C | 3 | |||
| Peak pulse voltage, contact discharge | VPP | 30 | kV | IEC 61000-4-2, C = 150 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse voltage, air discharge | VPP | 30 | kV | IEC 61000-4-2, C = 150 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse power dissipation | PPP | 1500 | W | Tj initial = Tamb, Tamb = 25 °C | 2 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 2 | ||
| Operating junction temperature range | Tj | -55 | 150 | °C | 2 | ||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s | 2 |
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 | • Lead finishing: matte tin plating Complies with the following standards | 1 |
CAD (KiCad official)
- Symbol:
SMCJ40A-TR - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
smcj40a-tr-etched.step/smcj40a-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smcj40a-tr.step/smcj40a-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
c130bf5265b0e135, retrieved 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band 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).