The Vishay 1.5KE120CA-E3/54 is a surface-mount transient voltage suppressor diode. This diode is designed to protect against voltage spikes and typical applications include automotive, industrial, and telecom. The full part number is 1.5KE120CA-E3/54, which is composed of the 1.5KE Series code, the 120CA Voltage rating code, the E3 Voltage clamp code, and the 54 Packaging code.
The Series code corresponds to the specific type of diode, and the 1.5KE stands for 1500W unidirectional Transient Voltage Suppressor (TVS). This particular diode has a Peak pulse power rating of 1500W (1.5kW) and is designed to suppress voltage transients up to protection levels of 120 Volts. The E3 Voltage Clamp code indicates that the Peak Clamping Voltage (Vcmax) for this diode is 135V. The 54 Packaging code tells us that the diode is RoHS compliant and comes in a SOT-23 package, with leads of 0.3mm width.
Overall, the Vishay 1.5KE120CA-E3/54 is an excellent choice for protecting sensitive electronics from voltage spikes up to 120 Volts.