The Square D LC3D180AP7 is a TeSys Deca star-delta starter, built for AC-3 motor starting duty. It's now officially obsolete per the manufacturer's lifecycle notice, which is the first fact a procurement buyer needs.
This is a pre-wired star-delta starter, with three power poles rated for AC-3 utilisation category — meaning it's sized for squirrel-cage motor starting where the starting current is the load. The contact configuration is 3 x 3 NO (three normally-open main poles). Pollution degree 3 and flame retardance V1 per UL 94 back up its panel environment suitability.
Any replacement will require a form-fit-function check against the existing panel mounting and motor rating — the AC-3 and pole count are the gate spec lines.
Physical and environmental specs (quick reference)
Storage temperature from -60 to 80 °C; altitude rating 3000 m without derating. Climatic withstand per IEC 60947-1 Annex Q category D, with TH protective treatment. Vibration resistance: 2 Gn open, 4 Gn closed at 5–300 Hz; shock: 10 Gn open, 15 Gn closed at 11 ms.