The 24VDC 15A power relay plays a critical role in controlling high-power loads in HVAC systems, offering efficient and reliable operation. This relay type is essential for switching large electrical components such as compressors, fans, and heaters in heating, ventilation, and air conditioning (HVAC) units. Understanding the function, features, and advantages of this power relay is vital for anyone involved in HVAC system installation, maintenance, or design.

What is a 24VDC 15A Power Relay? A 24VDC 15A power relay is an electrical device used to control high-power circuits by receiving a low-power input signal (24VDC) and using it to switch the higher-power load. The “24VDC” refers to the voltage required to activate the relay’s control coil, while the “15A” indicates the maximum current the relay can handle on the switching contacts. These relays are widely used in HVAC systems because they allow operators to control large electrical loads with a low-voltage, safe control signal. Why 24VDC for HVAC? The choice of 24VDC for control signals is prevalent in HVAC systems for several reasons：