# FH2045D

**XIN FEI HONG** · MOSFETs · TO-252

FH2045D from XIN FEI HONG, in a TO-252. 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; capable of 2.5V gate drive, with VGS rated at ±12V maximum and a gate threshold of 0.6 to 0.9V at ID=1mA. |
| 2 | D | passive | Drain, also connected to the exposed mounting tab; VDS is rated at 20V, with 80A continuous (package limited) and 160A pulsed drain current. |
| 3 | S | passive | Source; the body diode has a forward voltage of 1.2V maximum at IS=2.5A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XIN FEI HONG |
| Package | TO-252 |
| Category | Triode/MOS Tube/Transistor |
| 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 Breakdown Voltage | BVDSS | 20 |  |  | V | VGS=0V, ID=250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 4.5 | mΩ | VGS=4.5V, ID=20A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 6 | mΩ | VGS=2.5V, ID=12A | 2 |
| Gate Threshold Voltage | VGS(th) | 0.6 |  | 0.9 | V | VDS=VGS, ID=1mA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 10 | uA | VDS=16V, VGS=0V | 2 |
| Gate-Source Leakage | IGSS |  |  | 100 | nA | VGS=+12V, VDS=0V | 2 |
| Total Gate Charge | Qg |  | 62 | 99.2 | nC | ID=20A | 2 |
| Input Capacitance | Ciss |  | 4000 | 6400 | pF | VGS=0V | 2 |
| Gate Resistance | Rg |  | 1.4 | 2.8 | Ω | f=1.0MHz | 2 |
| Forward On Voltage | VSD |  |  | 1.2 | V | IS=2.5A, VGS=0V | 2 |
| Drain-Source Voltage | VDS |  |  | 20 | V |  | 1 |
| Gate-Source Voltage | VGS |  |  | 12 | V |  | 1 |
| Drain Current | ID@TA=25℃ |  |  | 80 | A | VGS @ 4.5V | 1 |
| Drain Current | ID@TA=70℃ |  |  | 65 | A | VGS @ 4.5V | 1 |
| Pulsed Drain Current | IDM |  |  | 160 | A |  | 1 |
| Total Power Dissipation | PD@TA=25℃ |  |  | 3.13 | W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Maximum Thermal Resistance, Junction-case | Rthj-c |  |  | 5 | ℃/W |  | 1 |
| Maximum Thermal Resistance, Junction-ambient | Rthj-a |  |  | 40 | ℃/W | Surface mounted on 1 in2 2oz copper pad of FR4 board, t <10sec | 1 |

## CAD (KiCad official)

- Symbol: `FH2045D`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `fh2045d-etched.step` / `fh2045d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fh2045d.step` / `fh2045d.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/8588954862406520832) (6 pp, sha256 `58ca8ac1f45483cc`, retrieved 2026-10-18, 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/fh2045d-datasheet.pdf)