BUY UG4D-E3/73 https://www.utsource.net/itm/p/11711046.html

Description: UG4D-E3/73 is a 4.7V Zener diode from Vishay. Features: Low leakage current Low thermal resistance Low reverse current High power dissipation High surge current capability High stability Applications: UG4D-E3/73 is suitable for applications such as voltage regulation, voltage clamping, and surge protection. It is also suitable for use in automotive, industrial, and consumer electronics. (For reference only)