# LMUN2233LT1G

**LRC** · Digital Transistors · SOT-23

LMUN2233LT1G from LRC, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Base | input | Base input pin. Drives the NPN transistor through the monolithic series bias resistor R1 = 4.7 kΩ; R2 = 47 kΩ sits between the internal base node and the emitter. Input high turns the transistor on. |
| 2 | Emitter | passive | Emitter of the internal NPN transistor. Typically tied to circuit ground / signal return. |
| 3 | Collector | output | Open-collector output of the internal NPN transistor. Typically pulled up to a supply through the load; IC up to 100 mA, VCEO = 50 V max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `LMUN2233LT1G`
- `LMUN2233LT1GLT3G`

## CAD (KiCad official)

- Symbol: `LMUN2233LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lmun2233lt1g-etched.step` / `lmun2233lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmun2233lt1g.step` / `lmun2233lt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586172813665849344) (16 pp, sha256 `7a7fc5dcf748e5bd`, retrieved 2026-08-17, 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/lmun2233lt1g-datasheet.pdf)