# GX357NC

**GUOXIN JIAPIN SEMICONDUCTOR** · Transistor, Photovoltaic Output Optoisolators · SOP-4-2.54mm

GX357NC from GUOXIN JIAPIN SEMICONDUCTOR, in a SOP-4-2.54mm. 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 | Anode | passive | Anode of the input infrared emitting diode, with a rated forward current of 50 mA, peak forward current of 1 A (1 us pulse) and reverse voltage of 6 V. |
| 2 | Cathode | passive | Cathode of the input infrared emitting diode, with a typical forward voltage of 1.2 V (max 1.4 V) at IF = 20 mA. |
| 3 | Emitter | passive | Emitter of the output phototransistor, with a maximum emitter-collector voltage of 7 V. |
| 4 | Collector | passive | Collector of the output phototransistor, with a collector-emitter voltage of 80 V max and collector current of 50 mA max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GUOXIN JIAPIN SEMICONDUCTOR |
| Package | SOP-4-2.54mm |
| Category | Optoisolators |
| Pins | 4 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | 1.1 (A) Maximum Body Case Temperature Profile for evaluation of Reflow Profile Note: Reference: IPC/JEDEC J-STD-020D | 10 |

## CAD (KiCad official)

- Symbol: `GX357NC`
- Footprint: `Package_SO:SOP-4_3.8x4.1mm_P2.54mm`
- 3D model: SOP-4-2.54mm (KiCad packages3D, STEP)
- 3D model files: `gx357nc-etched.step` / `gx357nc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gx357nc.step` / `gx357nc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GUOXIN JIAPIN SEMICONDUCTOR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758142415612198912) (11 pp, sha256 `c538a3b1e5339921`, retrieved 2026-10-26, tier: lcsc)
- **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/gx357nc-datasheet.pdf)