# SI2310A

**UMW** · MOSFETs · SOT-23

SI2310A from UMW, 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 N-channel MOSFET; gate-source voltage is rated at ±20 V in the absolute maximum ratings. |
| 2 | S | passive | SOURCE terminal of the N-channel MOSFET; the reference for VGS, and the datasheet gives no separate pin-level limit for it. |
| 3 | D | passive | DRAIN terminal of the N-channel MOSFET; drain-source voltage is rated at 60 V and continuous drain current at 3 A (TA = 25°C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| 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 |  |  | 60 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 3 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | 2.3 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | 10 | A | Pulse width ≤ 300us, duty cycle ≤ 2% | 1 |
| Power Dissipation | PD |  |  | 1.38 | W | TA=25°C | 1 |
| Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | 60 |  |  | V | ID=250µA, VGS=0V | 2 |
| Gate-Body leakage current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 2 |
| Gate Threshold Voltage | VGS(th) | 1 | 1.6 | 3 | V | VDS=VGS, ID=-250μA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 67 | 80 | mΩ | VGS=10V, ID=3A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 77 | 95 | mΩ | VGS=4.5V, ID=2A | 2 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | IS=1.2A, VGS=0V | 2 |
| Thermal Resistance Junction-to-ambient | RthJa |  | 90 |  | °C/W |  | 1 |
| Thermal Resistance Junction-to-ambient (Fig. 10 note) | Rthja |  | 270 |  | °C/W | Peak Tj = PDM x Rthja + Ta (Fig. 10 note) | 4 |
| Input Capacitance | Ciss |  | 490 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 55 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 40 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |

## CAD (KiCad official)

- Symbol: `SI2310A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `si2310a-etched.step` / `si2310a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si2310a.step` / `si2310a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755881171094261760) (7 pp, sha256 `84bdced6245e8cb9`, 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/si2310a-datasheet.pdf)