# KIRLML5203TRPBF

**KUU** · MOSFETs · SOT-23

KIRLML5203TRPBF from KUU, 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; gate-source voltage is rated at ±20 V (VGS). |
| 2 | SOURCE | passive | Source terminal; the datasheet rates continuous drain current at -3.0 A and continuous source-drain diode current at -1.3 A. |
| 3 | DRAIN | passive | Drain terminal; the datasheet rates drain-source voltage at -30 V and pulsed diode current at -24 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| 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 | VDS |  |  | -30 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -3 | A |  | 1 |
| Pulsed Diode Current | IDM |  |  | -24 | A |  | 1 |
| Power Dissipation | PD |  |  | 1.25 | W |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 100 | ℃/W | t≤5s | 1 |
| Operating Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Drain-source breakdown voltage | V(BR)DSS | -30 |  |  | V | VGS = 0V, ID = -250µA | 2 |
| Gate-source threshold voltage | VGS(th) | -1 |  | -2.5 | V | VDS =VGS, ID = -250µA | 2 |
| Gate-source leakage | IGSS | -100 |  | 100 | nA | VDS =0V, VGS = ±20V | 2 |
| Zero gate voltage drain current | IDSS |  |  | -1 | µA | VDS = -24V, VGS =0V | 2 |
| Drain-source on-state resistance (VGS = -10V) | RDS(on) |  |  | 98 | mΩ | VGS = -10V, ID = -3.0A | 2 |
| Drain-source on-state resistance (VGS = -4.5V) | RDS(on) |  |  | 165 | mΩ | VGS = -4.5V, ID = -2.5A | 2 |
| Diode forward voltage | VSD |  | -0.8 | -1.2 | V | IS=1A, VGS=0V | 2 |
| Continuous Source-Drain Diode Current | IS |  |  | -1.3 | A |  | 2 |

## CAD (KiCad official)

- Symbol: `KIRLML5203TRPBF`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `kirlml5203trpbf-etched.step` / `kirlml5203trpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kirlml5203trpbf.step` / `kirlml5203trpbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944099555102720) (3 pp, sha256 `458bc1253e4e0baf`, retrieved 2026-10-09, 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/kirlml5203trpbf-datasheet.pdf)