Carrier KR51BJ419 Fan Pulley Refrigerant and UDX series models

and UDX series models

With its automatic reset functionality and convertible range adjuster

offering a reliable safety margin against voltage spikes during the starting phase

Fail-safe spring return: Ensures the valve moves to a predetermined safe position upon loss of control air

Enhanced System Safety: The Double Pole Single Throw (DPST) configuration provides robust circuit interruption for 230V heating circuits

Carrier KR51BJ419 Fan Pulley Refrigerant and UDX series modelsThe Carrier KR51BJ419 Fan Pulley is a high performance 1 groove sheave engineered for demanding commercial and residential HVAC applications. As a genuine OEM replacement part, this steel fan pulley ensures precise mechanical alignment and belt tensioning, preventing premature wear on high static blower motors. Balancing 7. 15 lbs of durable steel, the KR51BJ419 is a direct fit solution for Carrier 40RU series air handlers and rooftop units,