# 2SC4672U-H127

**ST Semtech** · Bipolar (BJT) · SOT-89

2SC4672U-H127 from ST Semtech, 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 | input | Base of the NPN transistor; VEBO max 6 V, IEBO max 100 nA at VEB = 5 V. |
| 2 | C | passive | Collector of the NPN transistor; VCBO 60 V, VCEO 50 V, IC 3 A DC and 6 A pulse (TP = 10 ms). |
| 3 | E | passive | Emitter of the NPN transistor; reference terminal for VCE and VEB ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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) |  |  | 0.35 | V | IC = 1 A, IB = 50 mA | 2 |
| DC Current Gain | hFE | 120 |  | 270 |  | VCE = 2 V, IC = 0.5 A | 2 |
| DC Current Gain | hFE | 45 |  |  |  | VCE = 2 V, IC = 1.5 A | 2 |
| Collector Base Breakdown Voltage | V(BR)CBO | 60 |  |  | V | IC = 50 µA | 2 |
| Collector Emitter Breakdown Voltage | V(BR)CEO | 50 |  |  | V | IC = 1 mA | 2 |
| Emitter Base Breakdown Voltage | V(BR)EBO | 6 |  |  | V | IE = 50 µA | 2 |
| Collector Base Cutoff Current | ICBO |  |  | 100 | nA | VCB = 60 V | 2 |
| Emitter Base Cutoff Current | IEBO |  |  | 100 | nA | VEB = 5 V | 2 |
| Collector Base Voltage | VCBO |  |  | 60 | V |  | 1 |
| Collector Emitter Voltage | VCEO |  |  | 50 | V |  | 1 |
| Emitter Base Voltage | VEBO |  |  | 6 | V |  | 1 |
| Collector Current - DC | IC |  |  | 3 | A |  | 1 |
| Collector Current - Pulse | ICP |  |  | 6 | A | TP = 10 ms | 1 |
| Total Power Dissipation | Ptot |  |  | 0.5 | W | Device on FR-4 PCB, 2oz copper, minimum recommended pad layout (note 1) | 1 |
| Total Power Dissipation | Ptot |  |  | 2 | W | Device on FR-4 PCB, 2oz copper, 1-inch square copper plate in still air (note 2) | 1 |
| Junction Temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 250 | ℃/W | Device on FR-4 PCB, 2oz copper, minimum recommended pad layout (note 1) | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 62.5 | ℃/W | Device on FR-4 PCB, 2oz copper, 1-inch square copper plate in still air (note 2) | 1 |

## CAD (KiCad official)

- Symbol: `2SC4672U-H127`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sc4672u-h127-etched.step` / `2sc4672u-h127-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sc4672u-h127.step` / `2sc4672u-h127.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ST Semtech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603136455258750976) (4 pp, sha256 `9207053ceee562d7`, 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/2sc4672u-h127-datasheet.pdf)