The 1.5KE100CA is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse. It has a breakdown voltage (VBR) of 100 volts and a peak pulse power (PPP) rating of 600 watts. This device is designed to protect sensitive circuits from high-voltage electrical transients generated by inductive and capacitive loads, lightning strikes, electrostatic discharge, and other fast-changing power conditions. The 1.5KE100CA also helps to reduce radiated noise caused by voltage transients, allowing for a smoother, quieter operation. It is available in an SMD package and has a variety of mounting options, including axial and radial lead, tab, and PCB mount configurations.