Toshiba RA421A3TB-20MD Inverter Compressor, R410A

The Toshiba TOSHIBA RA421A3TB-20MD is a Toshiba Carrier direct current variable frequency dual rotor compressor, specially designed for the R410A refrigerant system. It has an exhaust volume of 42.1 cm³/rev, an input power of approximately 3.75 kW, a COP of about 3.95, and is a main model in the 4-kilowatt category. It features a wide-frequency speed control design, compatible with 70–380V / 30–240Hz direct current variable frequency drives. It can maintain high efficiency under low loads, has small temperature fluctuations, and low start-up and shutdown impacts. The dual rotor structure is combined with a brushless direct current motor with optimized uniformity, resulting in small torque fluctuations, low vibration and noise, and smooth and reliable operation. It is mainly paired with the Toshiba MMY-SAP series super modular multi-split units (VRF) outdoor units. Each unit is filled with approximately 1900cc of oil at the time of factory shipment.