# KY3407C

**KY** · MOSFETs · SOT-23

KY3407C from KY, 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 | GATE | input | Gate of the P-channel MOSFET, with gate-source voltage rated at ±20 V (VGSS) in the maximum ratings. |
| 2 | SOURCE | passive | Source of the P-channel MOSFET; the datasheet gives no separate pin-level limit beyond the device maximum ratings. |
| 3 | DRAIN | passive | Drain of the P-channel MOSFET, rated for a drain-source voltage of -30 V (VDSS) in the maximum ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDSS |  |  | -30 | V |  | 1 |
| Gate-Source Voltage | VGSS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -3.2 | A |  | 1 |
| Pulsed Drain Current | IDM |  |  | -12.8 | A | Repetitive rating, pulse width limited by max junction temperature | 1 |
| Total Power Dissipation | Ptot |  |  | 1.25 | W |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 100 | ℃/W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -30 |  |  | V | VGS = 0V, ID = -250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS = -30V, VGS = 0V, TJ = 25℃ | 2 |
| Gate to Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS = ±20V, VDS = 0V | 2 |
| Gate Threshold Voltage | VGS(th) | -1 | -1.86 | -2.5 | V | VDS = VGS, ID = -250μA | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 57 | 80 | mΩ | VGS = -10V, ID = -3A | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 112 | 130 | mΩ | VGS = -4.5V, ID = -2A | 2 |

## CAD (KiCad official)

- Symbol: `KY3407C`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ky3407c-etched.step` / `ky3407c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ky3407c.step` / `ky3407c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590233092452749312) (5 pp, sha256 `43f52fbc59d3ca25`, 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/ky3407c-datasheet.pdf)