The SMBJ60CA is an ESD suppressor or TVS diode manufactured by Littelfuse. It is a bi-directional device, meaning that it can protect an electronic component from over-voltage whether it is being supplied with a positive or negative voltage. The device is rated for 600W and 60V, with a 5% tolerance. It is used to protect against transients, which can cause damage to components if not properly protected. It is suitable for applications in industrial, commercial, and automotive electronics, such as motor drives, power supplies, programming ports, and logic inputs/outputs.