# SB2045L

**MSKSEMI** · Schottky Barrier Diodes (SBD) · TO-277

SB2045L from MSKSEMI, in a TO-277. 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 | A1 | passive | Anode lead, one of two small anode leads tied together on the symbol with PIN 3; the datasheet's anode pad is 5.6mm x 14.4mm for the thermal-resistance test. |
| 2 | K | passive | Cathode, the large exposed pad (cathode pad 18.8mm x 14.4mm in the thermal-resistance test), marked by the cathode band. |
| 3 | A2 | passive | Anode lead, tied to PIN 1 on the symbol; the two anode leads together carry the 20.0A maximum average forward current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | TO-277 |
| Category | Diodes |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `SB2045L`
- Footprint: `Package_TO_SOT_SMD:TO-277A`
- 3D model: TO-277 (KiCad packages3D, STEP)
- 3D model files: `sb2045l-etched.step` / `sb2045l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sb2045l.step` / `sb2045l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](docs/sb2045l-datasheet.pdf) (5 pp, sha256 `336f86a8b792f54a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sb2045l-datasheet.pdf)