component
SMPC33A-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
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownSMPC33A-M3
Vishay Intertech · ESD And Surge Protection (TVS/ESD) · TO-277A
SMPC33A-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 | Cathode 1 | passive | Cathode-side terminal 1 of the SMPC33A transient voltage suppressor, per the pinout drawing for the SMPCxxA variant; the datasheet states the cathode band marks the cathode end and that electrical characteristics apply only when two identical-polarity terminals are connected. |
| 2 | Anode Cathode 2 | passive | Terminal 2 is labelled 'Anode Cathode 2' in the pinout drawing, so its polarity is not stated unambiguously in the text and it should be confirmed against the drawing or manufacturer before layout. |
| 3 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | TO-277A |
| Category | Circuit Protection |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
SMPC33A-M3 - Footprint:
Package_TO_SOT_SMD:TO-277A - 3D model: TO-277A (KiCad packages3D, STEP)
- 3D model files:
smpc33a-m3-etched.step/smpc33a-m3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smpc33a-m3.step/smpc33a-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 2026-10-12, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).