The 78RB05ST is a 5-position, SPST thru-hole DIP switch designed for reliable configuration on printed circuit boards. It features recessed, tool-actuated slides and a standard sealed base, with the 'S' designation indicating a top tape seal for protection during machine soldering and heavy cleaning processes. This Series 78 switch provides a mechanical life of 2,000 operations, a current carry rating of 4 A, and an initial contact resistance of 30 mΩ or less. With its spring and ball contact mechanism and a wide operating temperature range of -40°C to +85°C, it is well-suited for setting modes, addresses, and configurations in industrial controls, computing, and telecommunications equipment.