# 2SD874A

**Shikues** · Bipolar (BJT) · SOT-89

2SD874A from Shikues, 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 terminal of the NPN transistor; the datasheet gives a minimum emitter-base breakdown voltage V(BR)EBO of 5 V at IE=10uA, IC=0, and VEBO is listed in the maximum ratings table. |
| 2 | C | passive | Collector terminal; the datasheet gives minimum breakdown voltages of 50 V for V(BR)CBO at IC=10uA, IE=0 and 40 V for V(BR)CEO at IC=2mA, IB=0, with DC collector current IC and power dissipation PC rated in the maximum ratings table. |
| 3 | E | passive | Emitter terminal, the reference for the base-emitter and collector-emitter specifications, with the emitter-base limit VEBO given in the maximum ratings table. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shikues |
| 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-emitter saturation voltage | VCE(sat) |  |  | 0.4 | V | IC=500mA, IB=50mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 1.2 | V | IC=500mA, IB=50mA | 1 |
| DC current gain | hFE | 85 |  | 340 |  | VCE=10V, IC=500mA | 1 |
| DC current gain | hFE | 50 |  |  |  | VCE=5V, IC=1A | 1 |
| Collector cut-off current | ICBO |  |  | 0.1 | uA | VCB=20V, IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | 0.1 | uA | VEB=4V, IC=0 | 1 |
| Collector-base breakdown voltage | V(BR)CBO | 50 |  |  | V | IC=10uA, IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | 40 |  |  | V | IC=2mA, IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE=10uA, IC=0 | 1 |
| Transition frequency | fT | 200 |  |  | MHz | VCE=10V, IE=50mA | 1 |
| Output capacitance | COb |  |  | 20 | pF | VCE=10 V, IE=0 mA, f=1.0MHz | 1 |
| Collector-base voltage | VCBO |  |  | 50 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | 40 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector power dissipation | PC |  |  | 0.5 | W |  | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `2SD874A`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sd874a-etched.step` / `2sd874a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sd874a.step` / `2sd874a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shikues datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757069283517960192) (3 pp, sha256 `317932dfec94211a`, retrieved 2026-10-18, 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/2sd874a-datasheet.pdf)