Stearns 471104009 Sinpac Switch 40A 115VAC Industrial

Stearns 471104009 SINPAC Switch is a 40 A, 115 VAC solid-state electronic start switch designed to govern the start circuit of single‑phase motors in industrial equipment, energizing and disconnecting the start winding as the motor comes up to speed. As part of the SINPAC family, these switches are engineered to be non‑sparking, filter electrical noise, and help extend motor life, and they bear UL Recognized status (File E71115) for use in demanding environments. In SINPAC catalogs, CV (capacitor‑start) and IVR (instant reverse capacitor‑start) variants specify 115 V start circuits with a maximum start-current rating around 40 A, making them suitable for capacitor‑start and capacitor‑start/run motor configurations. Stearns positions SINPAC switches as standard industrial controls for equipment such as brakes and clutches, where robust start switching and noise suppression are critical, and the 471104009 model represents a purpose‑built solution for reliable motor starting in harsh or high‑duty applications. Cadmium‑free, non‑spark switching with noise filtration helps mitigate arcing and EMI in industrial plants, contributing to longer motor life and more consistent starting performance.