# FC-ULCT1013-1:200-35A

**FANGCHENG** · Current Sense Transformers · DIP-4

FC-ULCT1013-1:200-35A 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 | SEC_1 | passive | Secondary winding (N turns, 200 turns for 1:200) terminal; secondary inductance measured across pins 1-2 is 20.0 mH min, DCR 6000 mOhm max. |
| 2 | SEC_2 | passive | Secondary winding (N turns) opposite terminal to pin 1; connects to burden resistor RT with pin 1, DCR 6000 mOhm max. |
| 3 | PRI_3 | passive | Primary winding (1 turn) terminal; primary current rating up to 35A, DCR 0.8 mOhm max measured across pins 4-3. |
| 4 | PRI_4 | passive | Primary winding (1 turn) terminal opposite pin 3 where input current Iin flows; up to 35A, DCR 0.8 mOhm max across 4-3. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FANGCHENG |
| Package | DIP-4 |
| Category | Inductors, Coils, Chokes |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `FC-ULCT1013-1:200-35A`
- Footprint: `Package_DIP:DIP-4_W7.62mm`
- 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files: `fc-ulct1013-1-200-35a-etched.step` / `fc-ulct1013-1-200-35a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fc-ulct1013-1-200-35a.step` / `fc-ulct1013-1-200-35a.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/8757285718496555008) (1 pp, sha256 `425f760c6f1442cf`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/fc-ulct1013-1-200-35a-datasheet.pdf)