# 2SC1815

**hongjiacheng** · Bipolar (BJT) · SOT-23

2SC1815 from hongjiacheng, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Base | input | Base input terminal, maximum emitter-base voltage 5.0V |
| 2 | Emitter | passive | Emitter terminal of NPN transistor, maximum collector-emitter voltage 50V |
| 3 | Collector | passive | Collector terminal, maximum collector current 0.15A, maximum VCBO 60V, and power dissipation 200mW |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| 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 Voltage | VCBO |  |  | 60 | V |  | 1 |
| Collector-Emitter Voltage | VCEO |  |  | 50 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector Current | IC |  |  | 0.15 | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 200 | mW |  | 1 |
| Storage temperature | Tstg | -55 |  | 125 | ℃ |  | 1 |
| Junction temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Collector-Base Breakdown Voltage | V(BR)CBO | 60 |  |  | V | IC=100μA, IE=0 | 1 |
| Collector-Emitter Breakdown Voltage | V(BR)CEO | 50 |  |  | V | IC=0.1mA, IB=0 | 1 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | 5 |  |  | V | IE=100μA, IC=0 | 1 |
| Collector-Emitter cut-off current | ICEO |  |  | 0.1 | μA | VCE=50V, IB=0 | 1 |
| Collector-Base cut-off current | ICBO |  |  | 0.1 | μA | VCB=60V, IE=0 | 1 |
| Emitter-Base cut-off current | IEBO |  |  | 0.1 | μA | VEB=5V, IC=0 | 1 |
| DC Current Gain | hFE | 130 |  | 400 |  | IC=2mA VCE=6.0V | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | 0.25 | V | IC=100mA, IB=10mA | 1 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | 1 | V | IC=100mA, IB=10mA | 1 |
| Transition frequency | fT | 80 |  |  | MHz | IC=1mA, VCE=10V,f=30MHz | 2 |
| Typical Thermal Resistance Junction-to-Ambient | RθJ-A |  | 417 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SC1815`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `2sc1815-etched.step` / `2sc1815-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sc1815.step` / `2sc1815.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8564879688163491840) (3 pp, sha256 `e737de9891f79daf`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/2sc1815-datasheet.pdf)