component
SM4T50CAY
Public Made by Adomby adom
STMicroelectronics TVS, SMA(DO-214AC). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 8d ago |
| viewers | 8d ago |
| package.json | 8d ago |
| page.json | 8d ago |
| README.md | 8d ago |
| sm4t50cay-etched.glb | 8d ago |
| sm4t50cay-etched.step | 8d ago |
| sm4t50cay-hero.glb | 8d ago |
| sm4t50cay-hero.overlay.json | 8d ago |
| sm4t50cay.glb | 8d ago |
| sm4t50cay.kicad_mod | 8d ago |
| sm4t50cay.kicad_sym | 8d ago |
| sm4t50cay.lbr | 8d ago |
| sm4t50cay.step | 8d ago |
SM4T50CAY
STMicroelectronics · TVS · SMA(DO-214AC)
SM4T50CAY from STMicroelectronics, in a SMA(DO-214AC). 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 | SMA(DO-214AC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power dissipation | PPP | 400 | W | Tj initial = Tamb, 10/1000 µs | 2 | ||
| Peak pulse voltage ISO 10605 C=150 pF R=330 Ω contact discharge | VPP | 30 | kV | ISO 10605, C = 150 pF, R = 330 Ω, contact discharge | 2 | ||
| Peak pulse voltage ISO 10605 C=150 pF R=330 Ω air discharge | VPP | 30 | kV | ISO 10605, C = 150 pF, R = 330 Ω, air discharge | 2 | ||
| Peak pulse voltage ISO 10605 C=330 pF R=330 Ω contact discharge | VPP | 30 | kV | ISO 10605, C = 330 pF, R = 330 Ω, contact discharge | 2 | ||
| Peak pulse voltage ISO 10605 C=330 pF R=330 Ω air discharge | VPP | 30 | kV | ISO 10605, C = 330 pF, R = 330 Ω, 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 | ||
| Leakage current | IRM | 0.2 | µA | @ VRM, 25 °C | 3 | ||
| Leakage current | IRM | 1 | µA | @ VRM, 85 °C | 3 | ||
| Breakdown voltage | VBR | 47.8 | 50.3 | 52.8 | V | @ IR = 1 mA, pulse test tp < 50 ms | 3 |
| Stand-off voltage | VRM | 43 | V | 3 | |||
| Clamping voltage 10/1000 µs | VCL | 69.4 | V | @ IPP = 5.7 A, 10/1000 µs | 3 | ||
| Dynamic resistance 10/1000 µs | RD | 2.91 | Ω | 10/1000 µs | 3 | ||
| Clamping voltage 8/20 µs | VCL | 91 | V | @ IPP = 25 A, 8/20 µs | 3 | ||
| Dynamic resistance 8/20 µs | RD | 1.53 | Ω | 8/20 µs | 3 | ||
| Voltage temperature coefficient | αT | 10.2 | 10-4/°C | 3 |
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 | copper | ambient versus copper surface under each lead | 5 |
CAD (KiCad official)
- Symbol:
SM4T50CAY - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
sm4t50cay-etched.step/sm4t50cay-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm4t50cay.step/sm4t50cay.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
b8d3299b0200f7ea, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal 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).