The 84-5241.2B20 is an illuminated emergency stop switch designed for panel mounting in a standard Ø 22.3 mm cutout. It is configured with two normally closed (2 NC) contacts made of gold-plated material and utilizes a slow-make switching element with a maintained action. The switch is rated for an operational voltage of 250 VAC/DC, has a rated impulse withstand voltage of 4 kV, and a thermal current of 5 A. It offers high durability with a mechanical lifetime of 250,000 cycles and an electrical lifetime of 50,000 cycles. With robust front protection ratings of IP65, IP66, and IP67, and a wide operating temperature range, this switch is ideal for ensuring safety in demanding industrial machinery and control panel applications.