The SP-140574 kit is a spare parts kit with transistors and snubbers in the spare parts catalog for the 1336 series by Allen-Bradley/Rockwell Automation. Transistors are sensitive parts that need to be installed inside the drive along with the circuitry and electrical parts. Adjustable AC drives from the 1336 series require 6 transistors per drive and these need to be compatible in their output ratings and voltage ranges. The Allen-Bradley/Rockwell Automation SP-140574 kit with transistors and snubbers is compatible with the 1336 drives that have “B100” and “B125” in their part numbers. Both kinds of drives have an output rating of 150 to 180 Amps and a voltage rating between the 380 and 460 Volts AC. The environmental conditions for this kit will depend on the enclosure and protection degree of the drive since it is installed inside the drive.

When installing the Allen-Bradley/Rockwell Automation SP-140574 transistors and snubbers, the area needs to be prepared in advance to ensure that all the tools that are going to be used are static-free. Electrostatic discharge can cause damages to the transistors or the drive even before installation and that is why it is recommended to use wrist straps and gloves to avoid electrostatic discharge. The voltage needs to be removed from the drive before inserting the Allen-Bradley/Rockwell Automation SP-140574 transistors and snubbers. Note that this installation process is somewhat invasive for the drive since the enclosure needs to be opened and the drive will be exposed to the open environment while the transistors are being installed. It is recommended to ensure that the environment is clean to avoid the entrance of dirt into the drive.