3RH1921-2DA11

The Siemens part number 3RH1921-2DA11 is an auxiliary switch designed for use in electrical control systems. It operates efficiently with an insulation voltage rating of 500 V and is capable of enduring surge voltage conditions up to 6 kV. This model includes one normally closed contact and one normally open contact, accommodating various switching requirements while maintaining an operational current capacity of 10 A.

Built with a protection class of IP20, this auxiliary switch is intended for installation in environments that do not expose the device to significant dust or moisture. The fastening method utilizes snap-on mounting, facilitating a quick and easy installation process. Its compact dimensions measure 72.5 mm in height, 10 mm in width, and 71 mm in depth, allowing for efficient use of space within control panels.

Electrical connections are managed via spring-loaded terminals, which provide secure and reliable connections while simplifying the wiring process. The switch is compatible with conductor cross sections ranging from 0.5 to 2.5 mm², allowing flexibility in various applications. Notably, the contact reliability of the 3RH1921-2DA11 is exceptional, demonstrating only one faulty switching occurrence for every 100 million operations, making it a durable choice for demanding tasks.