# CM1293A-02SR

**TECH PUBLIC** · Electrostatic And Surge Protection (TVS/ESD) · SOT-143

CM1293A-02SR from TECH PUBLIC, in a SOT-143. 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 | CH1 | passive | Channel 1 I/O protected line, rated 1.0pF max to GND with 5.5V max reverse standoff voltage and ±15kV IEC 61000-4-2 ESD protection. |
| 2 | CH2 | passive | Channel 2 I/O protected line, rated 1.0pF max to GND with 5.5V max reverse standoff voltage and ±15kV IEC 61000-4-2 ESD protection. |
| 3 | VP | power_in | Positive rail of the diode-steering array, connected to the supply or positive reference of the protected interface (reverse standoff voltage 5.5V max). |
| 4 | VN | power_in | Negative rail of the diode-steering array, connected to ground (GND) as the reference for I/O capacitance and leakage specifications. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-143 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `CM1293A-02SR`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/cm1293a-02sr-datasheet.pdf) (4 pp, sha256 `9695e23322fd3ff2`, retrieved 2026-11-04, 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/cm1293a-02sr-datasheet.pdf)