MCA (Minimum Circuit Ampacity) and MOP (Maximum Overcurrent Protection) are electrical specs that tell your electrician what size wire and breaker your unit needs. You can find these values for every Heat Pump System on our site in the Technical Data sheets. Getting these right is vital for the safety and Warranty Policy of your new Ductless Mini Split. If the breaker is too small, the unit will trip frequently; if the wire is too small, it can become a fire hazard. Our Multi-Zone condensers require higher amperage than single-zone units. Always share these technical specs with your HVAC Pro before they begin the installation. Proper electrical sizing is the foundation of a reliable system. It ensures your unit has all the power it needs for peak summer cooling.