# RCLAMP0544M

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · MSOP-10

RCLAMP0544M from TECH PUBLIC, in a MSOP-10. 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 | Line 1 | passive | Data line 1 protected I/O pin (steering diodes to Vcc and GND), 0.3pF IO-to-IO typical, 5V working voltage, pin 1 indicator end. |
| 2 | Line 2 | passive | Data line 2 protected I/O pin, rated 5V reverse working voltage maximum, ±25kV air / ±20kV contact ESD per IEC 61000-4-2. |
| 3 | GND | power_in | Ground reference for the TVS array, common return for all line steering diodes (Pin 3 in schematic). |
| 4 | Line 3 | passive | Data line 3 protected I/O pin, clamping voltage 14V max at 1A and 20V max at 5A (8x20µs). |
| 5 | Line 4 | passive | Data line 4 protected I/O pin, peak pulse current 5A (8/20µs) rating. |
| 6 | NC | unconnected | No connect, bottom right pin opposite Line 4. |
| 7 | NC | unconnected | No connect. |
| 8 | Vcc | power_in | Power line connection protected by the array, joined to the common cathode of the steering diodes and the zener TVS (Pin 8 in schematic); 5V working voltage. |
| 9 | NC | unconnected | No connect. |
| 10 | NC | unconnected | No connect, top right pin opposite Line 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | MSOP-10 |
| Category | Circuit Protection |
| Pins | 10 |

## CAD (KiCad official)

- Symbol: `RCLAMP0544M`
- Footprint: `Package_SO:MSOP-10_3x3mm_P0.5mm`
- 3D model: MSOP-10 (KiCad packages3D, STEP)
- 3D model files: `rclamp0544m-etched.step` / `rclamp0544m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rclamp0544m.step` / `rclamp0544m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603103646754492416) (4 pp, sha256 `2f22180612f8ec70`, retrieved 2026-10-18, 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/rclamp0544m-datasheet.pdf)