# FC-DLFH2520-102Y-LF

**FANGCHENG** · Common Mode Filters · DIP-4

FC-DLFH2520-102Y-LF from FANGCHENG, in a DIP-4. 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 | 1 | passive | Winding 1 terminal, connected through the choke winding to pin 4; rated 18.0A current, 6.5mΩ max DCR at 25°C. |
| 2 | 2 | passive | Winding 2 terminal, connected through the choke winding to pin 3; rated 18.0A current, 1500V ACV insulation test voltage. |
| 3 | 3 | passive | Winding 2 terminal, other end of the winding from pin 2; rated 18.0A current. |
| 4 | 4 | passive | Winding 1 terminal, other end of the winding from pin 1; rated 18.0A current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FANGCHENG |
| Package | DIP-4 |
| Category | Filters |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `FC-DLFH2520-102Y-LF`
- Footprint: `Package_DIP:DIP-4_W7.62mm`
- 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files: `fc-dlfh2520-102y-lf-etched.step` / `fc-dlfh2520-102y-lf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fc-dlfh2520-102y-lf.step` / `fc-dlfh2520-102y-lf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FANGCHENG datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600630110344908800) (2 pp, sha256 `1b98c30f3bf82da9`, retrieved 2026-10-13, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/fc-dlfh2520-102y-lf-datasheet.pdf)