# FH4812

**XIN FEI HONG** · MOSFETs · SO-8

FH4812 from XIN FEI HONG, in a SO-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 | S2 | passive | Source of MOSFET 2 (N-channel, VDS = 30V, ID = 10A). |
| 2 | G2 | input | Gate of MOSFET 2, with VGS rated ±20V and a threshold of 1 to 2V. |
| 3 | S1 | passive | Source of MOSFET 1 (N-channel, VDS = 30V, ID = 10A). |
| 4 | G1 | input | Gate of MOSFET 1, with VGS rated ±20V and a threshold of 1 to 2V. |
| 5 | D1 | passive | Drain of MOSFET 1, rated 30V VDS and 10A continuous at TA=25°C. |
| 6 | D1 | passive | Drain of MOSFET 1, rated 30V VDS and 10A continuous at TA=25°C. |
| 7 | D2 | passive | Drain of MOSFET 2, rated 30V VDS and 10A continuous at TA=25°C. |
| 8 | D2 | passive | Drain of MOSFET 2, rated 30V VDS and 10A continuous at TA=25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XIN FEI HONG |
| Package | SO-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 |  |  | 30 | V |  | 1 |
| Gate-Source Voltage | VGS |  |  | 20 | V | Printed as '+ 20' | 1 |
| Drain Current, VGS @ 10V | ID@TA=25℃ |  |  | 10 | A | VGS @ 10V, TA=25℃ (note 3) | 1 |
| Pulsed Drain Current | IDM |  |  | 40 | A | Pulse width limited by max. junction temperature (note 1) | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Maximum Thermal Resistance, Junction-ambient | Rthj-a |  |  | 62.5 | ℃/W | Surface mounted on 1 in2 copper pad of FR4, t<10sec (note 3) | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 30 |  |  | V | VGS=0V, ID=250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 11.5 | mΩ | VGS=10V, ID=10A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 18 | mΩ | VGS=4.5V, ID=5A | 2 |
| Gate Threshold Voltage | VGS(th) | 1 |  | 2 | V | VDS=VGS, ID=1mA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=24V, VGS=0V | 2 |
| Gate-Source Leakage | IGSS |  |  | 100 | nA | VGS=+20V, VDS=0V | 2 |
| Total Gate Charge | Qg |  | 14 | 22.4 | nC | ID=5A | 2 |
| Input Capacitance | Ciss |  | 790 | 1280 | pF | VGS=0V | 2 |
| Gate Resistance | Rg |  | 2.5 | 5 | Ω | f=1.0MHz | 2 |
| Forward On Voltage | VSD |  |  | 1.2 | V | IS=1.7A, VGS=0V | 2 |

## CAD (KiCad official)

- Symbol: `FH4812`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `fh4812-etched.step` / `fh4812-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fh4812.step` / `fh4812.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XIN FEI HONG datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588946180147044352) (5 pp, sha256 `7ed2d6cf25f1c57e`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/fh4812-datasheet.pdf)