# SI4904DY-T1-E3-HXY

**HXY MOSFET** · MOSFETs · SOP-8

SI4904DY-T1-E3-HXY from HXY MOSFET, in a SOP-8. 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 | S1 | passive | Source of MOSFET 1 (N-channel), with VDS rated 40V and ID of 12A. |
| 2 | G1 | input | Gate of MOSFET 1, with VGS maximum of ±20V and threshold of 1V to 2.0V at 250µA. |
| 3 | S2 | passive | Source of MOSFET 2 (N-channel), with VDS rated 40V and ID of 12A. |
| 4 | G2 | input | Gate of MOSFET 2, with VGS maximum of ±20V and threshold of 1V to 2.0V at 250µA. |
| 5 | D2 | passive | Drain of MOSFET 2, internally tied with pin 6, with VDS rated 40V. |
| 6 | D2 | passive | Drain of MOSFET 2, internally tied with pin 5, with VDS rated 40V. |
| 7 | D1 | passive | Drain of MOSFET 1, internally tied with pin 8, with VDS rated 40V. |
| 8 | D1 | passive | Drain of MOSFET 1, internally tied with pin 7, with VDS rated 40V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOP-8 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 8 |

## 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 |  |  | 40 | V | Tj=25°C | 1 |
| Gate-Source Voltage | VGS |  |  | 20 | V | Tj=25°C; printed +20 | 1 |
| Drain Current | ID@TA=25℃ |  |  | 12 | A | VGS @ 4.5V | 1 |
| Drain Current | ID@TA=70℃ |  |  | 7 | A | VGS @ 4.5V | 1 |
| Pulsed Drain Current | IDM |  |  | 40 | A |  | 1 |
| Total Power Dissipation | PD@TA=25℃ |  |  | 2.9 | W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Maximum Thermal Resistance, Junction-ambient | Rthj-a |  |  | 65 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 40 |  |  | V | VGS=0V ID=250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VDS=40V,VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V,VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | 1 | 1.5 | 2 | V | VDS=VGS,ID=250μA | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 12 | 16 | mΩ | VGS=10V, ID=8A | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 18.9 | 24 | mΩ | VGS=4.5V, ID=4A | 2 |
| Forward Transconductance | gFS | 33 |  |  | S | VDS=5V,ID=8A | 2 |
| Diode Forward Voltage | VSD |  | 0.8 | 1.2 | V | VGS=0V,IS=9A | 2 |
| Input Capacitance | Clss |  | 964 |  | PF | VDS=20V,VGS=0V,F=1.0MHz | 2 |
| Output Capacitance | Coss |  | 109 |  | PF | VDS=20V,VGS=0V,F=1.0MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 96 |  | PF | VDS=20V,VGS=0V,F=1.0MHz | 2 |
| Turn-on Delay Time | td(on) |  | 5.5 |  | nS | VDD=20V, RL=2.5Ω, VGS=10V, RGEN=3Ω | 2 |
| Turn-on Rise Time | tr |  | 14 |  | nS | VDD=20V, RL=2.5Ω, VGS=10V, RGEN=3Ω | 2 |
| Turn-Off Delay Time | td(off) |  | 24 |  | nS | VDD=20V, RL=2.5Ω, VGS=10V, RGEN=3Ω | 2 |
| Turn-Off Fall Time | tf |  | 12 |  | nS | VDD=20V, RL=2.5Ω, VGS=10V, RGEN=3Ω | 2 |
| Total Gate Charge | Qg |  | 22.9 |  | nC | VDS=20V,ID=8A,VGS=10V | 2 |
| Gate-Source Charge | Qgs |  | 3.5 |  | nC | VDS=20V,ID=8A,VGS=10V | 2 |
| Gate-Drain Charge | Qgd |  | 5.3 |  | nC | VDS=20V,ID=8A,VGS=10V | 2 |

## CAD (KiCad official)

- Symbol: `SI4904DY-T1-E3-HXY`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `si4904dy-t1-e3-hxy-etched.step` / `si4904dy-t1-e3-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si4904dy-t1-e3-hxy.step` / `si4904dy-t1-e3-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](docs/si4904dy-t1-e3-hxy-datasheet.pdf) (6 pp, sha256 `97d6d1e452cbe5ad`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/si4904dy-t1-e3-hxy-datasheet.pdf)