PESD0402-­140 from Littelfuse Inc. is a TVS diode intended for circuit protection in compact electronic designs where safeguarding sensitive signal or power lines from transient events is important. Devices in this category are commonly considered for portable electronics, communication interfaces, consumer products, and densely packed boards that need low-footprint ESD or surge protection. For engineers, the value of this type of component is its role in improving system robustness and helping reduce field failures caused by electrostatic discharge and related transient stress. As a Littelfuse protection component, it is positioned for applications where board space, response speed, and protection strategy are central design concerns. The lifecycle status for PESD0402-­140 is currently information not available, so teams should confirm ongoing production status directly with Littelfuse Inc. or authorized distributors before locking it into new designs. RoHS compliance information is also not available in the provided data and should be verified using the official datasheet, compliance declaration, or manufacturer support channels.