component
SMPC51AN-M3
Public Made by Adomby adom
Vishay Intertech ESD And Surge Protection (TVS/ESD), TO-277A. 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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Contents
README
markdownSMPC51AN-M3
Vishay Intertech · ESD And Surge Protection (TVS/ESD) · TO-277A
SMPC51AN-M3 from Vishay Intertech, in a TO-277A. 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 | Anode 1 | passive | Anode terminal 1 of the SMPCxxAN uni-directional TVS; the two anode terminals are connected together, and the datasheet's electrical characteristics apply only when both identical-polarity terminals are connected. |
| 2 | Anode 2 | passive | Anode terminal 2 of the SMPCxxAN uni-directional TVS; connect it with anode 1, as the datasheet's electrical characteristics apply only when both identical-polarity terminals are connected. |
| 3 | Cathode | passive | Cathode (K) of the SMPCxxAN, which the datasheet table lists as the cathode on the heatsink; the page 1 drawing labels it 3 and the package outline marks the cathode band. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | TO-277A |
| Category | Circuit Protection |
| Pins | 3 |
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 (test current 1.0 mA) | VBR | 56.7 | 62.7 | V | at IT = 1.0 mA | 2 | |
| Maximum reverse leakage current | IR | 1 | µA | at VWM | 2 | ||
| Maximum peak pulse surge current | IPPM | 18.2 | A | Surge current waveform per fig. 3 and derated per fig. 2 | 2 | ||
| Maximum clamping voltage at IPPM | VC | 82.4 | V | at IPPM | 2 | ||
| Peak power dissipation | PPPM | 1500 | W | 10/1000 µs waveform (fig. 3) | 1 | ||
| Power dissipation | PD | 1.25 | W | TA = 25 °C | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Thermal resistance junction-to-ambient | RJA | 85 | 100 | °C/W | Device mounted on FR4 PCB, 2 oz. standard footprint (JEDEC 51-2A) | 3 | |
| Thermal resistance junction-to-mount | RJM | 2.5 | 3 | °C/W | JEDEC 51-14 Transient Dual Interface Test Method (TDIM) | 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 | tin | Terminals: matte tin plated leads, solderable per J-STD-002 and JESD 22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SMPC51AN-M3 - Footprint:
Package_TO_SOT_SMD:TO-277A - 3D model: TO-277A (KiCad packages3D, STEP)
- 3D model files:
smpc51an-m3-etched.step/smpc51an-m3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smpc51an-m3.step/smpc51an-m3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Vishay Intertech datasheet (6 pp, sha256
632200d8d69aa343, retrieved 2026-10-16, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).