# FH3418L

**鑫飞宏** · IC · SOT-23-3L

FH3418L from 鑫飞宏, in a SOT-23-3L. 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; gate-source voltage limited to ±20 V, logic level compatible with RDS(on) specified at VGS = -4.5 V, -5.0 V and -10 V. |
| 2 | S | passive | Source; continuous drain current is -7.2 A (TJ = 150°C) and diode forward current is -3.2 A. |
| 3 | D | passive | Drain; drain-source voltage rated -25 V with pulsed drain current of -28 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | 鑫飞宏 |
| Package | SOT-23-3L |
| Category |  |
| 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 |  |  | -25 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -7.2 | A | TJ = 150°C | 1 |
| Pulsed Drain Current | IDM |  |  | -28 | A |  | 1 |
| Power Dissipation | PD |  |  | 1.25 | W |  | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |
| Drain-source Breakdown Voltage | BVDSS | -25 |  |  | V | VGS = 0V, ID = -250µA | 2 |
| Gate Threshold Voltage | VGS(th) | -1.9 |  | -0.9 | V | VDS = VGS, ID = -250µA | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VDS = 0V, VGS = ±20V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | µA | VDS = -25V, VGS = 0V | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 12 | 17 | mΩ | VGS = -10V, ID = -4.0A | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 17 | 22 | mΩ | VGS = -4.5V, ID = -4.0A | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 16 | 21 | mΩ | VGS = -5.0V, ID = -1.0A | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | VGS = 0V, IS = -1.0A (Note 2) | 2 |
| Diode Forward Current | IS |  |  | -3.2 | A | Note 1: mounted on FR4 board, t ≤ 5 sec | 2 |
| Thermal Resistance-Junction to Ambient | RthJA |  | 92 |  | °C/W | Note 1: mounted on FR4 board, t ≤ 5 sec | 1 |

## CAD (KiCad official)

- Symbol: `FH3418L`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `fh3418l-etched.step` / `fh3418l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fh3418l.step` / `fh3418l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [鑫飞宏 datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602964888419782656) (4 pp, sha256 `f4db69bec5941dec`, retrieved 2026-10-17, 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/fh3418l-datasheet.pdf)