The Allen-Bradley SP-151137 Base Driver Power Supply Circuit Board Kit serves as an essential replacement for the 1336 series constant torque adjustable frequency drives, specifically designed to enhance or repair Allen-Bradley Bulletin 1336 drives. It operates in a voltage range of 380 to 460 Volts AC, accommodating a nominal current output of 41 Amps and a power rating of up to 33 KVA at 460 Volts AC. Featuring a U21 microchip and an under-voltage trip protection at 388 Volts DC, this kit facilitates straightforward installation and replacement with its included fastening screws and installation instructions, making it an integral part of maintaining the efficiency and reliability of your drives.