The "/U" suffix typically denotes a "Universal" or retail-packaged version of the exact same flange adapter used in industrial applications

Whether used in fresh air intake

as well as the VA9203 and VA9208 Spring-Return series

398Op/310Cl s1-025-17620-009

ClimateMaster 15B0013N21 Run Capacitor 319848-301 The "/U" suffix typically denotesThe ClimateMaster 15B0013N21 Run Capacitor is a mission critical component designed for geothermal heat pump maintenance and heavy duty HVAC compressor applications. This 4mfd 440v oval run capacitor provides the necessary phase shift to maintain motor torque and operational efficiency, preventing the common heat pump troubleshooting issue of high amperage draw. Built to survive rigorous commercial HVAC equipment cycles, its 440VAC rating offers