component
SM15T18A
Public Made by Adomby adom
STMicroelectronics ESD And Surge Protection (TVS/ESD), 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
markdownSM15T18A
STMicroelectronics · ESD And Surge Protection (TVS/ESD) · SMC
SM15T18A 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, 25 °C | IRM | 0.2 | µA | at VRM, 25 °C | 3 | ||
| Reverse leakage current at VRM, 85 °C | IRM | 1 | µA | at VRM, 85 °C | 3 | ||
| Breakdown voltage (min) | VBR | 17.1 | V | at IBR = 1 mA | 3 | ||
| Breakdown voltage (typ) | VBR | 18 | V | at IBR = 1 mA | 3 | ||
| Breakdown voltage (max) | VBR | 18.9 | V | at IBR = 1 mA | 3 | ||
| Clamping voltage, 10/1000 µs | VCL | 25.2 | V | 10/1000 µs surge, IPP = 59.5 A | 3 | ||
| Peak pulse current, 10/1000 µs | IPP | 59.5 | A | 10/1000 µs surge | 3 | ||
| Dynamic resistance, 10/1000 µs | RD | 0.106 | Ω | 10/1000 µs surge | 3 | ||
| Clamping voltage, 8/20 µs | VCL | 32.5 | V | 8/20 µs surge, IPP = 308 A | 3 | ||
| Peak pulse current, 8/20 µs | IPP | 308 | A | 8/20 µs surge | 3 | ||
| Dynamic resistance, 8/20 µs | RD | 0.044 | Ω | 8/20 µs surge | 3 | ||
| Temperature coefficient of VBR | αT | 8.8 | 10^-4/°C | VBR at Tj = VBR at 25 °C × (1 + αT × (Tj − 25)) | 3 | ||
| Stand-off voltage | VRM | 15.3 | V | reverse stand-off voltage | 3 | ||
| Peak pulse voltage, contact discharge (IEC 61000-4-2) | VPP | 30 | kV | IEC 61000-4-2, C = 150 pF, R = 330 Ω, contact discharge | 2 | ||
| Peak pulse voltage, air discharge (IEC 61000-4-2) | VPP | 30 | kV | IEC 61000-4-2, C = 150 pF, R = 330 Ω, air discharge | 2 | ||
| Peak pulse power dissipation | PPP | 1500 | W | Tj initial = Tamb | 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:
SM15T18A - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
sm15t18a-etched.step/sm15t18a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm15t18a.step/sm15t18a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
3d4c7f4c7f31852c, retrieved 2026-10-16, 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).