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SM6T42CAY

Public Made by Adom

by adom

STMicroelectronics TVS, 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.

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SM6T42CAY

STMicroelectronics · TVS · SMB(DO-214AA)

SM6T42CAY 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 1 passive Terminal 1 of an unpolarised fuse; either orientation.
2 2 passive Terminal 2 of an unpolarised fuse; either orientation.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SMB(DO-214AA)
Category TVS/Fuse/Board Level 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
Breakdown voltage VBR 36 40 44.2 V at IBR = 1 mA, Tamb = 25 °C 3
Reverse leakage current at 25 °C IRM 0.2 µA at VRM, 25 °C 3
Reverse leakage current at 85 °C IRM 1 µA at VRM, 85 °C 3
Clamping voltage 10/1000 µs VCL 58.1 V 10/1000 µs, IPP = 10.3 A 3
Peak pulse current 10/1000 µs IPP 10.3 A 10/1000 µs 3
Dynamic resistance 10/1000 µs RD 1.35 Ω 10/1000 µs 3
Clamping voltage 8/20 µs VCL 76 V 8/20 µs, IPP = 52 A 3
Peak pulse current 8/20 µs IPP 52 A 8/20 µs 3
Dynamic resistance 8/20 µs RD 0.611 Ω 8/20 µs 3
Voltage temperature coefficient αT 10 10-4/°C max 3
Stand-off voltage VRM 36 V 3
Peak pulse power dissipation PPP 600 W 10/1000 µs, Tj initial = Tamb 2
Peak pulse voltage ISO10605 contact discharge (C=330 pF, R=330 Ω) VPP 30 kV Contact discharge 2
Peak pulse voltage ISO10605 air discharge (C=330 pF, R=330 Ω) VPP 30 kV Air discharge 2
Peak pulse voltage ISO10605/IEC 61000-4-2 contact discharge (C=150 pF, R=330 Ω) VPP 30 kV Contact discharge 2
Peak pulse voltage ISO10605/IEC 61000-4-2 air discharge (C=150 pF, R=330 Ω) VPP 30 kV Air discharge 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: SM6T42CAY
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: sm6t42cay-etched.step / sm6t42cay-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sm6t42cay.step / sm6t42cay.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (15 pp, sha256 fba04c93f47a2390, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (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