# KY3415B

**KY** · MOSFETs · SOT-23

KY3415B 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 terminal of the P-channel MOSFET, rated for a gate-source voltage VGSS of ±10 V with a gate threshold of -0.4 V to -1.0 V. |
| 2 | SOURCE | passive | Source terminal of the P-channel MOSFET; the datasheet gives no separate pin-specific limit for this pin. |
| 3 | DRAIN | passive | Drain terminal of the P-channel MOSFET, rated for a drain-source voltage VDSS of -20 V and continuous drain current of -4 A at TC = 25℃. |

## 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 |  |  | -20 | V |  | 1 |
| Gate-Source Voltage | VGSS | -10 |  | 10 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -4 | A | TC = 25℃ | 1 |
| Continuous Drain Current | ID |  |  | -2.6 | A | TC = 100℃ | 1 |
| Pulsed Drain Current | IDM |  |  | -20 | A | note1 | 1 |
| Power Dissipation | PD |  |  | 1.67 | W | TA = 25℃ | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 75 | ℃/W |  | 1 |
| Operating and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | ℃ |  | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -20 |  |  | V | VGS=0V, ID=-250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS = -20V, VGS = 0V | 2 |
| Gate to Body Leakage Current | IGSS | -10 |  | 10 | μA | VDS =0V, VGS = ±8V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.4 |  | -1 | V | VDS= VGS, ID= -250μA | 2 |
| Static Drain-Source on-Resistance | RDS(on) |  | 38 | 45 | mΩ | VGS =-4.5V, ID =-4A | 2 |
| Static Drain-Source on-Resistance | RDS(on) |  | 48 | 60 | mΩ | VGS =-2.5V, ID =-3A | 2 |
| Forward Transconductance | gFS | 8 |  |  | S | VDS =-5V, ID = -4A | 2 |
| Maximum Continuous Drain to Source Diode Forward Current | IS |  |  | -4 | A |  | 2 |
| Maximum Pulsed Drain to Source Diode Forward Current | ISM |  |  | -20 | A |  | 2 |
| Drain to Source Diode Forward Voltage | VSD |  |  | -1.2 | V | VGS = 0V, IS = -4A | 2 |

## CAD (KiCad official)

- Symbol: `KY3415B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ky3415b-etched.step` / `ky3415b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ky3415b.step` / `ky3415b.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/8590233613946937344) (5 pp, sha256 `e7f2d588afbea213`, 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/ky3415b-datasheet.pdf)