# BC327-40

**LGE** · Bipolar (BJT) · TO-92

BC327-40 from LGE, in a TO-92. 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 | EMITTER | passive | Emitter lead of the BC327/328 PNP transistor; the datasheet gives an emitter-base breakdown limit of VEBO = -5 V and a continuous collector current rating of -800 mA. |
| 2 | BASE | passive | Base lead of the BC327/328 PNP transistor; the datasheet gives a base-emitter saturation voltage of -1.2 V at IC = -500 mA, IB = -50 mA. |
| 3 | COLLECTOR | passive | Collector lead of the BC327/328 PNP transistor; the datasheet gives collector-emitter voltage ratings of -45 V (BC327) and -25 V (BC328) and a collector power dissipation of 625 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | TO-92 |
| 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 voltage | VCBO |  |  | -50 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -45 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector current, continuous | IC |  |  | -800 | mA |  | 1 |
| Collector power dissipation | PC |  |  | 625 | mW |  | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Collector-base breakdown voltage (BC327) | VCBO | -50 |  |  | V | IC= -100uA, IE=0 | 1 |
| Collector-emitter breakdown voltage (BC327) | VCEO | -45 |  |  | V | IC= -10mA, IB=0 | 1 |
| Emitter-base breakdown voltage | VEBO | -5 |  |  | V | IE= -10uA, IC=0 | 1 |
| Collector cut-off current (BC327) | ICBO |  |  | -0.1 | uA | VCB= -45 V, IE=0 | 1 |
| Collector cut-off current (BC327) | ICEO |  |  | -0.2 | uA | VCE= -40 V, IB=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | uA | VEB= -4 V, IC=0 | 1 |
| DC current gain (hFE(1)) | hFE(1) | 100 |  | 630 |  | VCE=-1 V, IC= -100mA | 1 |
| DC current gain (hFE(2)) | hFE(2) | 40 |  |  |  | VCE=-1 V, IC= -300mA | 1 |
| DC current gain, rank 40 range | hFE | 250 |  | 630 |  | Rank 40 | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.7 | V | IC=-500mA, IB= -50mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -1.2 | V | IC= -500mA, IB=-50mA | 1 |
| Base-emitter voltage | VBE |  |  | -1.2 | V | VCE=-1 V, IC= -300mA | 1 |
| Transition frequency | fT |  | 260 |  | MHz | VCE= -5V, IC= -10mA, f = 100MHz | 1 |
| Collector output capacitance | Cob |  | 12 |  | pF | VCB=-10V, IE=0, f=1MHZ | 1 |

## CAD (KiCad official)

- Symbol: `BC327-40`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `bc327-40-etched.step` / `bc327-40-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc327-40.step` / `bc327-40.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588892867943411712) (3 pp, sha256 `5528b01ea44e1955`, retrieved 2026-10-17, tier: lcsc)
- **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/bc327-40-datasheet.pdf)