Increasing from 40VA to 60VA provides more "overhead" or capacity

and all necessary gaskets to ensure a leak-free assembly

preventing intermittent faults caused by poor crimps or substandard field terminations

Field installation is streamlined via standard 1/4-inch barbed connectors and the included versatile mounting bracket

Trane SWT1278 Limit Switch 321894-709 Increasing from 40VA to 60VAThe Trane SWT1278 Limit Switch is a critical safety component designed for precise thermal regulation within furnace supply plenums and industrial heating configurations. Engineered for high reliability performance, this fixed temperature limit control features a 150F opening setpoint (150op) to prevent heat exchanger overheating and a 120F closing setpoint (120cl) for circuit reset. As a veteran grade OEM replacement part, the SWT1278 is essential