# SZP6SMB33AT3G

**Littelfuse** · ESD And Surge Protection (TVS/ESD) · SMB

SZP6SMB33AT3G from Littelfuse, in a SMB. 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 | passive | Cathode terminal of the unidirectional TVS, identified on the package by the color band; the datasheet states the color band denotes the cathode for unidirectional components. |
| 2 | Anode | passive | Anode terminal of the unidirectional TVS, opposite the cathode band, which clamps transient voltages above the working peak reverse voltage (VRWM = 28.2 V for SZP6SMB33AT3G minimum breakdown, VBR 31.4 V minimum). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SMB |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SZP6SMB33AT3G`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `szp6smb33at3g-etched.step` / `szp6smb33at3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `szp6smb33at3g.step` / `szp6smb33at3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903845170171904) (7 pp, sha256 `7ee1f9a73732a9c3`, retrieved 2026-10-13, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/szp6smb33at3g-datasheet.pdf)