BUY SMAJ40A https://www.utsource.net/itm/p/11206913.html
TVS Diode
Description: The SMAJ40A is a unidirectional Transient Voltage Suppressor (TVS) diode designed to protect voltage sensitive components from high voltage, high energy transients. Features: * Low profile surface mount package * Low leakage current * Low clamping voltage * Fast response time * RoHS compliant Applications: * Automotive electronics * Industrial equipment * Telecommunications * Consumer electronics * Computers and peripherals (For reference only)