The BOURNS part PDB181-K420K-503A2 is a potentiometer designed with a resistance value of 50K Ohm and a tolerance of 20%. This carbon film potentiometer has a power rating of 0.1W (1/10W) and features a 1-electrical and 1-mechanical turn operation. With a compact size of 6mm, this potentiometer is suitable for panel mount or through-hole installation. Its dimensions measure 29.5 x 17 x 21mm, making it a versatile and space-saving component for various applications.