component
SM6T18CAY
Public Made by Adomby adom
STMicroelectronics ESD And Surge Protection (TVS/ESD), SMB(DO-214AA). 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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README
markdownSM6T18CAY
STMicroelectronics · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SM6T18CAY from STMicroelectronics, in a SMB(DO-214AA). 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 | SMB(DO-214AA) |
| 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 (minimum) | VBR | 17.1 | V | at IBR = 1 mA | 3 | ||
| Breakdown voltage (maximum) | VBR | 18.9 | V | at IBR = 1 mA | 3 | ||
| Clamping voltage, 10/1000 µs (maximum) | VCL | 25.2 | V | 10/1000 µs surge | 3 | ||
| Peak pulse current, 10/1000 µs (maximum) | IPP | 24 | A | 10/1000 µs surge | 3 | ||
| Dynamic resistance, 10/1000 µs (maximum) | RD | 0.263 | Ω | 10/1000 µs surge | 3 | ||
| Clamping voltage, 8/20 µs (maximum) | VCL | 32.5 | V | 8/20 µs surge | 3 | ||
| Peak pulse current, 8/20 µs (maximum) | IPP | 123 | A | 8/20 µs surge | 3 | ||
| Dynamic resistance, 8/20 µs (maximum) | RD | 0.111 | Ω | 8/20 µs surge | 3 | ||
| Peak pulse voltage, contact and air discharge | VPP | 30 | kV | ISO10605 (C = 330 pF, R = 330 Ω): contact discharge and air discharge | 2 | ||
| Peak pulse power dissipation | PPP | 600 | W | 10/1000 µs, Tj initial = Tamb | 2 | ||
| Storage temperature range (minimum) | Tstg | -65 | °C | 2 | |||
| Storage temperature range (maximum) | Tstg | 150 | °C | 2 | |||
| Operating junction temperature range (minimum) | Tj | -55 | °C | 2 | |||
| Operating junction temperature range (maximum) | Tj | 150 | °C | 2 | |||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s | 2 | ||
| Breakdown voltage (typical) | VBR | 18 | V | at IBR = 1 mA | 3 | ||
| Reverse stand-off voltage (test voltage in IRM column) | VRM | 15.3 | V | 3 | |||
| Breakdown voltage temperature coefficient | αT | 8.8 | 10-4/°C | 3 |
CAD (KiCad official)
- Symbol:
SM6T18CAY - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
sm6t18cay-etched.step/sm6t18cay-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm6t18cay.step/sm6t18cay.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (15 pp, sha256
a139eecdd64ba8b1, retrieved 2026-10-13, 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).