3 N 1 RELAY OVERLOAD COMBINATION. RELAY, OVERLOAD AND START CAPACITOR COMBINATION. REPLACES RELAY, OVERLOAD, AND PROVIDES A BOOST FOR HARD START AND UNBALANCED SYSTEMS. FOR SYSTEMS WITHOUT RUN CAPACITORS. PREVENTS LOW VOLTAGE STARTING PROBLEMS. FOR COMPRESSORS 1/4 TO 1/3 HP, 115V INSTRUCTIONS INCLUDED