Trane WW30X0903 Contactor

The Trane WW30X0903 is an electromechanical power contactor that switches high-current HVAC power circuits using a 24 VAC control coil, enabling reliable operation of compressors, fan motors, and heating circuits. It features a panel-mount design with a 24 VAC coil and 50/60 Hz compatibility and an application-dependent contact configuration that supports OEM replacement in Trane commercial HVAC systems. It is commonly installed in rooftop units, air handling units, air conditioners, and other commercial HVAC equipment, and it supports building automation and industrial climate control applications requiring dependable switching of HVAC loads. The MPN WW30X0903 from Trane is often used as a replacement for similar 24 VAC contactors, with common substitutes including Trane CTR02575 30A 3-Pole 24 VAC Contactor, Schneider Electric LC1D Series 24 VAC Coil, and Allen-Bradley 100-C Series 24 VAC Contactor.