Trane Furnas SWT-0529 SPDT Auxiliary Contact

The Trane Furnas SWT0529 SPDT auxiliary contact is a side-mounted, SPDT (Single Pole Double Throw) auxiliary contact block that expands motor-control circuits in Furnas and Trane commercial HVAC gear, providing an extra contact for status indication, interlocking, sequencing, and control switching. It is rated for 10 A at 250 VAC and designed for use with Furnas motor starters, contactors, and Trane commercial HVAC control equipment (application dependent). The SWT0529 serves as an OEM replacement auxiliary contact and is commonly used in commercial buildings, central chiller plants, rooftop HVAC units, and industrial automation panels where auxiliary status feedback and reliable electrical control are required.