component

SM15T33AY

Public Made by Adom

by adom

STMicroelectronics TVS, SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SM15T33AY

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sm15t33ay.step / sm15t33ay.glb are 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, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF