# BC817-16W

**Yangzhou Yangjie Elec Tech** · Bipolar (BJT) · SOT-323

BC817-16W from Yangzhou Yangjie Elec Tech, in a SOT-323. 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; the datasheet gives VEBO of 5.0 V maximum and IEBO of 0.1 uA maximum at VEB=4.0 V. |
| 2 | E | passive | Emitter of the NPN transistor; the datasheet gives VCEO of 45 V and IC of 0.5 A as the maximum collector ratings. |
| 3 | C | passive | Collector of the NPN transistor; the datasheet gives VCBO of 50 V, VCEO of 45 V and IC of 0.5 A as maximum ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-323 |
| 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-Emitter Voltage (breakdown) | VCEO | 45 |  |  | V | IC=10mAdc, IB=0 | 2 |
| Collector-Base Voltage (breakdown) | VCBO | 50 |  |  | V | IC=10uAdc, IE=0 | 2 |
| Emitter-Base Voltage (breakdown) | VEBO | 5 |  |  | V | IE=1.0uAdc, IC=0 | 2 |
| Emitter-base Cut-off Current | IEBO |  |  | 0.1 | uAdc | VEB=4.0Vdc, IC=0 | 2 |
| Collector-base Cut-off Current | ICBO |  |  | 0.1 | uAdc | VCB=45Vdc, IE=0 | 2 |
| DC Current Gain (BC817-16W rank range) | hFE(1) | 100 |  | 250 |  | IC=100mAdc, VCE=1.0Vdc | 2 |
| DC Current Gain | hFE(2) | 40 |  |  |  | IC=500mAdc, VCE=1.0Vdc | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | 0.7 | V | IC=500mAdc, IB=50mAdc | 2 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | 1.2 | V | IC=500mAdc, IB=50mAdc | 2 |
| Transition frequency | fT | 100 |  |  | MHz | IC=10mAdc, VCE=5.0Vdc, f=100MHz | 2 |
| Collector-Emitter Voltage | VCEO |  |  | 45 | V |  | 1 |
| Collector-Base Voltage | VCBO |  |  | 50 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector Current | IC |  |  | 0.5 | A |  | 1 |
| Power Dissipation |  |  |  | 0.2 | Watts | TA=25℃ | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 625 | ℃/W |  | 1 |
| Operation Junction Temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BC817-16W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bc817-16w-etched.step` / `bc817-16w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc817-16w.step` / `bc817-16w.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/8588916929666404352) (5 pp, sha256 `c963d42626f8f789`, retrieved 2026-10-18, 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/bc817-16w-datasheet.pdf)