# FC3357

**GUOXIN JIAPIN SEMICONDUCTOR** · Bipolar (BJT) · SOT-89

FC3357 from GUOXIN JIAPIN SEMICONDUCTOR, in a SOT-89. 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 | B | passive | Base pin of the NPN transistor; the datasheet's absolute maximum for emitter-base breakdown is VEBO 2.5 V, and the emitter-base leakage IEBO is specified at VEB=1 V. |
| 2 | C | passive | Collector pin; the limits are VCBO 20 V, VCEO 12 V and IC 100 mA maximum, with PC 1200 mW allowed only when a heat sink is used. |
| 3 | E | passive | Emitter pin; the datasheet states no emitter-specific limit beyond the emitter-base breakdown VEBO 2.5 V and the common device ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GUOXIN JIAPIN SEMICONDUCTOR |
| Package | SOT-89 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-base breakdown voltage (absolute maximum rating) | VCBO |  |  | 20 | V |  | 1 |
| Collector-emitter breakdown voltage (absolute maximum rating) | VCEO |  |  | 12 | V |  | 1 |
| Emitter-base breakdown voltage (absolute maximum rating) | VEBO |  |  | 2.5 | V |  | 1 |
| Collector current | IC |  |  | 100 | mA |  | 1 |
| Power dissipation | PC |  |  | 1200 | mW | 采用散热板 (with heat sink, footnote *) | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -65 |  | 150 | ℃ |  | 1 |
| DC current gain | hFE | 60 | 150 | 250 |  | VCE=10V,IC=20mA | 2 |
| Gain-bandwidth product | fT |  | 6.5 |  | GHz | VCE=10V,IC=20mA | 2 |
| Insertion power gain | /S21e/2 | 9 | 10 |  | dB | VCE=10V,IC=20mA,f=1GHz | 2 |

## CAD (KiCad official)

- Symbol: `FC3357`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `fc3357-etched.step` / `fc3357-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fc3357.step` / `fc3357.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/8590230514252099584) (5 pp, sha256 `6c6758e154aaa689`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/fc3357-datasheet.pdf)