# H4001DG-A

**Dongguan Mentech Optical Magnetic** · Pulse Transformers(LAN) · DIP-40

H4001DG-A from Dongguan Mentech Optical Magnetic, in a DIP-40. 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 | TD1+ | passive | Port 1 transmit/device-side winding positive terminal (1CT:1CT, 350 uH min OCL). |
| 2 | TD1- | passive | Port 1 device-side winding negative terminal. |
| 3 | TD2+ | passive | Port 2 device-side winding positive terminal. |
| 4 | TD2- | passive | Port 2 device-side winding negative terminal. |
| 5 | TCT1 | passive | Center tap of the device-side windings for port 1/2 (TD1/TD2). |
| 6 | TD3+ | passive | Port 3 device-side winding positive terminal. |
| 7 | TD3- | passive | Port 3 device-side winding negative terminal. |
| 8 | TD4+ | passive | Port 4 device-side winding positive terminal. |
| 9 | TD4- | passive | Port 4 device-side winding negative terminal. |
| 10 | TCT2 | passive | Center tap of the device-side windings for TD3/TD4. |
| 11 | TD5+ | passive | Port 5 device-side winding positive terminal. |
| 12 | TD5- | passive | Port 5 device-side winding negative terminal. |
| 13 | TD6+ | passive | Port 6 device-side winding positive terminal. |
| 14 | TD6- | passive | Port 6 device-side winding negative terminal. |
| 15 | TCT3 | passive | Center tap of the device-side windings for TD5/TD6. |
| 16 | TD7+ | passive | Port 7 device-side winding positive terminal. |
| 17 | TD7- | passive | Port 7 device-side winding negative terminal. |
| 18 | TD8+ | passive | Port 8 device-side winding positive terminal. |
| 19 | TD8- | passive | Port 8 device-side winding negative terminal. |
| 20 | TCT4 | passive | Center tap of the device-side windings for TD7/TD8. |
| 21 | MCT4 | passive | Center tap of the line-side windings for MX7/MX8. |
| 22 | MX8- | passive | Line-side winding negative terminal for channel 8. |
| 23 | MX8+ | passive | Line-side winding positive terminal for channel 8. |
| 24 | MX7- | passive | Line-side winding negative terminal for channel 7. |
| 25 | MX7+ | passive | Line-side winding positive terminal for channel 7. |
| 26 | MCT3 | passive | Center tap of the line-side windings for MX5/MX6. |
| 27 | MX6- | passive | Line-side winding negative terminal for channel 6. |
| 28 | MX6+ | passive | Line-side winding positive terminal for channel 6. |
| 29 | MX5- | passive | Line-side winding negative terminal for channel 5. |
| 30 | MX5+ | passive | Line-side winding positive terminal for channel 5. |
| 31 | MCT2 | passive | Center tap of the line-side windings for MX3/MX4. |
| 32 | MX4- | passive | Line-side winding negative terminal for channel 4. |
| 33 | MX4+ | passive | Line-side winding positive terminal for channel 4. |
| 34 | MX3- | passive | Line-side winding negative terminal for channel 3. |
| 35 | MX3+ | passive | Line-side winding positive terminal for channel 3. |
| 36 | MCT1 | passive | Center tap of the line-side windings for MX1/MX2. |
| 37 | MX2- | passive | Line-side winding negative terminal for channel 2. |
| 38 | MX2+ | passive | Line-side winding positive terminal for channel 2. |
| 39 | MX1- | passive | Line-side winding negative terminal for channel 1. |
| 40 | MX1+ | passive | Line-side winding positive terminal for channel 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Dongguan Mentech Optical Magnetic |
| Package | DIP-40 |
| Category | Inductors, Coils, Chokes |
| Pins | 40 |

## CAD (KiCad official)

- Symbol: `H4001DG-A`
- Footprint: `Package_DIP:DIP-40_W25.4mm`
- 3D model: DIP-40 (KiCad packages3D, STEP)
- 3D model files: `h4001dg-a-etched.step` / `h4001dg-a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `h4001dg-a.step` / `h4001dg-a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Dongguan Mentech Optical Magnetic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590910794525581312) (1 pp, sha256 `06ec7811c5d014d3`, retrieved 2026-10-17, 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/h4001dg-a-datasheet.pdf)