# SSTA28T116

**ROHM Semicon** · Darlington Transistors · SOT-23

SSTA28T116 from ROHM Semicon, in a SOT-23. 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 | Emitter | passive | Emitter of the Darlington NPN pair, with VEBO rated 12 V maximum and collector current IC up to 300 mA. |
| 2 | Base | passive | Base input of the Darlington NPN pair, with a base-emitter turn-on voltage VBE(on) of 1.4 V typical (2.0 V max) at VCE = 5 V, IC = 100 mA. |
| 3 | Collector | passive | Collector of the Darlington NPN pair, with VCES and VCBO rated 80 V maximum and IC up to 300 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `SSTA28T116`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ssta28t116-etched.step` / `ssta28t116-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ssta28t116.step` / `ssta28t116.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](docs/ssta28t116-datasheet.pdf) (8 pp, sha256 `a780919e7c691516`, retrieved 2026-11-02, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/ssta28t116-datasheet.pdf)