# 2SD1782-RQ

**Yangzhou Yangjie Elec Tech** · Bipolar (BJT) · SOT-23

2SD1782-RQ from Yangzhou Yangjie Elec Tech, 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 | B | input | Base of the NPN transistor; emitter-base voltage limited to 5 V (VEBO) and IEBO max 0.5 uA at VEB=4 V. |
| 2 | E | passive | Emitter of the NPN transistor; continuous collector current is limited to 500 mA. |
| 3 | C | passive | Collector of the NPN transistor; VCEO and VCBO are 80 V max, with continuous IC of 500 mA and PD of 200 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-23 |
| 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 | VCBO | 80 |  |  | V | IC= 50uA, IE=0 | 1 |
| Collector-emitter breakdown voltage | VCEO | 80 |  |  | V | IC= 2mA, IB=0 | 1 |
| Emitter-base breakdown voltage | VEBO | 5 |  |  | V | IE= 50uA, IC=0 | 1 |
| Collector-base cut-off current | ICBO |  |  | 0.5 | uA | VCB=50V, IE =0 | 1 |
| Emitter-base cut-off current | IEBO |  |  | 0.5 | uA | VEB=4 V , IC=0 | 1 |
| DC current gain | hFE | 180 |  | 390 |  | VCE= 3V, IC= 100mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.5 | V | IC=500mA, IB= 50mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 1.2 | V | IC=500mA, IB= 50mA | 1 |
| Transition frequency | fT | 180 |  |  | MHz | VCE=10V,IC=50mA,f=100MHz | 2 |
| Collector-base voltage | VCBO |  |  | 80 | V | Ta=25℃ | 1 |
| Collector-emitter voltage | VCEO |  |  | 80 | V | Ta=25℃ | 1 |
| Emitter-base voltage | VEBO |  |  | 5 | V | Ta=25℃ | 1 |
| Collector current -continuous | IC |  |  | 500 | mA | Ta=25℃ | 1 |
| Total device dissipation | PD |  |  | 200 | mW | Ta=25℃ | 1 |
| Junction temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `2SD1782-RQ`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `2sd1782-rq-etched.step` / `2sd1782-rq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sd1782-rq.step` / `2sd1782-rq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603581360775327744) (5 pp, sha256 `61b59f77a4f1647c`, retrieved 2026-10-09, 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/2sd1782-rq-datasheet.pdf)