The SMBJ40A-Q1-H is a transient voltage suppression (TVS) diode manufactured by FORMOSA MICROSEMI. Supreme Components International is an authorised distributor of FORMOSA MICROSEMI components, ensuring you receive genuine and reliable parts. This diode is designed to protect sensitive electronic equipment from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). With a breakdown voltage of 40V and a clamping voltage of 64.5V, the SMBJ40A-Q1-H effectively diverts surge current away from protected circuits. It is housed in a compact SMB (DO-214AA) package, making it suitable for space-constrained applications. This TVS diode is commonly used in automotive, industrial, and consumer electronics to enhance system reliability and prevent damage from voltage surges.