# KTC3265Y

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

KTC3265Y from Changjing, in a SOT-23. 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 | BASE | passive | Base terminal of the NPN transistor, with VBE of 0.5 to 0.8 V at VCE=1 V and IC=10 mA and a VEBO maximum of 5 V. |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor, with emitter-base breakdown voltage V(BR)EBO of 5 V at IE=100 µA. |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor, with maximum ratings of VCBO 35 V, VCEO 30 V, IC 800 mA and PC 200 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 breakdown voltage | V(BR)CBO | 35 |  |  | V | IC= 100μA, IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | 30 |  |  | V | IC= 10mA, IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE=100μA, IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | 0.1 | μA | VCB=30 V, IE=0 | 1 |
| DC current gain | hFE | 100 | 320 |  |  | VCE=1V, IC= 100mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.5 | V | IC=500mA, IB=20mA | 1 |
| Base-emitter voltage | VBE | 0.5 |  | 0.8 | V | VCE=1V,IC=10mA | 1 |
| Transition frequency | fT | 120 |  |  | MHz | VCE=5V, IC=10mA, f=100MHz | 1 |
| Collector output capacitance | Cob |  |  | 13 | pF | VCB=10V,IE=0,f=1MHZ | 1 |
| Collector-Base Voltage | VCBO |  |  | 35 | V |  | 1 |
| Collector-Emitter Voltage | VCEO |  |  | 30 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector Current | IC |  |  | 800 | mA |  | 1 |
| Collector Power Dissipation | PC |  |  | 200 | mW |  | 1 |
| Operation Junction and Storage Temperature Range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance From Junction To Ambient | RΘJA |  |  | 625 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `KTC3265Y`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ktc3265y-etched.step` / `ktc3265y-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ktc3265y.step` / `ktc3265y.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590931049390428160) (4 pp, sha256 `13fd361288cdb965`, 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/ktc3265y-datasheet.pdf)