component
SM15T33AY
Public Made by Adomby adom
STMicroelectronics TVS, SMC. Pinout cross-checked by two models against the datasheet, 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
markdownSM15T33AY
STMicroelectronics · TVS · SMC
SM15T33AY 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 of the unidirectional Transil (marked by the cathode band), connected to the protected line with a 33 V nominal breakdown voltage (VBR 31.4 V min to 34.7 V max) and a 28.2 V stand-off voltage (VRM). |
| 2 | A | passive | Anode of the unidirectional Transil, normally connected to ground, with 1500 W (10/1000 µs) peak pulse power capability. |
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 |
|---|---|---|---|---|---|---|---|
| Stand-off voltage | VRM | 28.2 | V | 3 | |||
| Leakage current at VRM, 25 °C | IRM | 0.2 | µA | @ VRM, Tamb = 25 °C | 3 | ||
| Leakage current at VRM, 85 °C | IRM | 1 | µA | @ VRM, 85 °C | 3 | ||
| Breakdown voltage | VBR | 31.4 | 33 | 34.7 | V | @ IR = 1 mA, pulse test tp < 50 ms | 3 |
| Clamping voltage 10/1000 µs | VCL | 45.7 | V | @ IPP = 33 A, 10/1000 µs | 3 | ||
| Dynamic resistance 10/1000 µs | RD | 0.333 | Ω | 10/1000 µs | 3 | ||
| Clamping voltage 8/20 µs | VCL | 59 | V | @ IPP = 169 A, 8/20 µs | 3 | ||
| Dynamic resistance 8/20 µs | RD | 0.14 | Ω | 8/20 µs | 3 | ||
| Voltage temperature coefficient | αT | 9.8 | 10-4/°C | 3 | |||
| Peak pulse voltage ISO 10605 contact discharge (330 pF) | VPP | 30 | kV | ISO 10605, C = 330 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse voltage ISO 10605 air discharge (330 pF) | VPP | 30 | kV | ISO 10605, C = 330 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse voltage ISO 10605 contact discharge (150 pF) | VPP | 30 | kV | ISO 10605, C = 150 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse voltage ISO 10605 air discharge (150 pF) | VPP | 30 | kV | ISO 10605, C = 150 pF, R = 330 Ω, Tamb = 25 °C | 2 | ||
| Peak pulse power dissipation | PPP | 1500 | W | Tj initial = Tamb, 10/1000 µs | 2 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 2 | ||
| Operating junction temperature range | Tj | -40 | 150 | °C | 2 | ||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s | 2 |
CAD (KiCad official)
- Symbol:
SM15T33AY - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
sm15t33ay-etched.step/sm15t33ay-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm15t33ay.step/sm15t33ay.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
c929f08172c291d2, retrieved 2026-10-23, tier: manufacturer) - 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).