The Littelfuse SMBJ20A is a bidirectional Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic components from overvoltage transients caused by lightning, inductive switching, and other powerline events. It has an off-state leakage current of less than 1.0 µA at 5 V, an on-state clamping voltage of 20 V (± 5%), and a peak pulse power rating of 600 W. The SMBJ20A has a variety of features that make it suitable for a wide range of applications such as automotive, consumer electronics, telecom, and industrial systems. Additionally, the SMBJ20A is UL certified for safe operation.