The Allen-Bradley SP-142494 kit is a 1336VT spare part kit. It contains a bridge rectifier or silicon controller rectifier for Allen-Bradley 1336VT AC drives which have output power ratings between 75 and 150 Horsepower and an input voltage rating of 380 to 460 Volts AC. Three SP-142494 kits are required per AC drive. A silicon controller rectifier (SCR) is a solid-state device that is used for controlling current. SCRs are unidirectional semiconductor devices and they can conduct current in only one direction. SCRs are triggered by a positive current entering the gate. The 1336VT series from Allen-Bradley is a series of adjustable frequency AC drives and kits like the SP-142494 kit. If unused, these drives should be stored in a dry and clean area where the ambient temperature is kept between -40 and 85 degrees Celsius.

The relative humidity for both operation and storage is from 5 to 95% for the 1336VT drives and their spare parts like the SP-142494 kit. When the 1336VT drive is received, it should be inspected to ensure that the drive was not damaged during transit. It should also be verified that the items on the packing list are all included. The 1336VT drives contain components that are sensitive to ESD or electrostatic discharge. Therefore, standard ESD precautions should be followed when the drive is serviced and when the SP-142494 kit is installed. The 1336VT drives are available in IP 00 (open) and IP 20 rated enclosures. The 1336VT drives rated for 75 Horsepower have an input current rating of 97 Amps, an input power rating of 63.8 kVA at 380 Volts AC, and 77.3 kVA at 460 Volts AC. The 1336VT drives rated for 150 Horsepower have an input current rating of 178 Amps, an input power rating of 117.2 kVA at 380 Volts AC, and 141.8 kVA at 460 Volts AC.