# SI2312A-TP

**MCC Micro Commercial Components** · MOSFETs · SOT-23

SI2312A-TP from MCC Micro Commercial Components, 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 N-channel MOSFET; the datasheet rates gate-source voltage VGS at ±8 V. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET; the datasheet rates drain-source voltage VDS at 20 V. |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET; the datasheet gives a repetitive pulsed drain current rating of 20 A (pulse width limited by maximum junction temperature). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| 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 |
|---|---|---|---|---|---|---|---|
| Gate-Source Voltage | VGS | -8 |  | 8 | V |  | 1 |
| Drain-Source Voltage | VDS |  |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 5 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | 4 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | 20 | A | Note 3 | 1 |
| Total Power Dissipation | PD |  |  | 1.25 | W | Note 4 | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  |  | 100 | °C/W | Note 2: device mounted on 1 in² FR-4 board with 2oz copper, still air, TA=25°C | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | 20 |  |  | V | VGS=0V, ID=250µA | 2 |
| Gate-Threshold Voltage | VGS(th) | 0.5 |  | 0.9 | V | VDS=VGS, ID=250µA | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±8V, VDS=0V | 2 |
| Drain-Source On-Resistance | RDS(on) |  |  | 25 | mΩ | VGS=4.5V, ID=5A | 2 |
| Drain-Source On-Resistance | RDS(on) |  |  | 33 | mΩ | VGS=2.5V, ID=4.7A | 2 |

## CAD (KiCad official)

- Symbol: `SI2312A-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `si2312a-tp-etched.step` / `si2312a-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si2312a-tp.step` / `si2312a-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC Micro Commercial Components datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603129635643678720) (6 pp, sha256 `a4ed8f49121de612`, 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/si2312a-tp-datasheet.pdf)