The document introduces the features of Cool MOS™ power transistors such as SPP21N50C3, SPB21N50C3, SPI21N50C3, and SPA21N50C3. These features include new high-voltage technology, best RDS(on), ultra-low gate charge, periodic avalanche rating, extreme dv/dt rating, ultra-low effective capacitance, and improved transconductance. The document also provides information on the packages, ordering codes, and maximum ratings of these models.