# MDD2305

**MDD Microdiode Semiconductor** · MOSFETs · SOT-23

MDD2305 from MDD Microdiode Semiconductor, 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 | G | input | Gate terminal of the P-channel MOSFET, with gate-source voltage rated at VGS ±10 V. |
| 2 | S | passive | Source terminal of the MOSFET, serving as the reference for VGS and the source of the body diode, which is rated at ISD -2 A. |
| 3 | D | passive | Drain terminal of the MOSFET, rated for drain-source voltage VDS -20 V and continuous drain current ID -4.2 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| 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 |  |  | -20 | V |  | 1 |
| Gate-Source Voltage | VGS | -10 |  | 10 | V | printed as ±10 V | 1 |
| Continuous Drain Current | ID |  |  | -4.2 | A |  | 1 |
| Power Dissipation | PD |  |  | 1.25 | W | Note 2 | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 100 | ℃/W | Note 2 | 1 |
| Junction Temperature and Storage Temperature | TJ,Tstg | -50 |  | 150 | ℃ |  | 1 |
| Pulsed Drain Current | IDM |  |  | -16.8 | A | Note 1 (pulse width limited by max junction temperature) | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -20 |  |  | V | VGS=0V, ID=250μA | 2 |
| Gate-Source Leakage Current (label as printed beside IDSS) | IDSS |  |  | -1 | uA | VDS=-20V, VGS=0V | 2 |
| Drain-Source Leakage Current (label as printed beside IGSS) | IGSS | -100 |  | 100 | nA | VGS=±10V, VDS=0V | 2 |
| Gate Threshold Voltage | VGS(TH) | -0.4 |  | -1 | V | VDS=VGS, ID=-250μA | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 37 | 48 | mΩ | VGS=-4.5V, ID=-3A | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 45 | 60 | mΩ | VGS=-2.5V, ID=-2A | 2 |
| Source drain current (Body Diode) | ISD |  |  | -2 | A |  | 2 |

## CAD (KiCad official)

- Symbol: `MDD2305`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mdd2305-etched.step` / `mdd2305-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mdd2305.step` / `mdd2305.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD Microdiode Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907312887042048) (5 pp, sha256 `765071b9b8d0e964`, 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/mdd2305-datasheet.pdf)