The SMBJ40A is a surface-mount bi-directional TVS diode manufactured by Shikues and is designed to protect sensitive electronic circuits from high voltage transients caused by electrostatic discharge (ESD), electrical fast transients (EFT), and lightning-induced surges. It helps to minimize damage and protect against voltage transients up to 40 Amps. This TVS RoHS-compliant diode is constructed in a small SMA package measuring 2.6 mm x 1.6 mm, and is ideal for use in space-constrained applications. It has a reverse standoff voltage of 43 V and a breakover clamping voltage of 54 V. Its V-I characteristics provide enhanced performance over traditional polymer-based designs with low operating and clamping voltages.