The 1N4748A is a robust 1W Zener diode manufactured by CDIL. Supreme Components International, an authorised distributor, provides this diode, which is specifically designed to maintain a constant voltage of 12V across its terminals when reverse biased. Housed in a DO-41 package, it's suitable for a wide range of applications, including voltage regulation, overvoltage protection, and clipping circuits. Its power dissipation capability of 1W makes it a reliable choice for circuits requiring stable voltage references. Trust Supreme Components International for quality electronic components.