The Siemens 3RU2126-1KB0 is a robust and reliable overload relay from the SIRIUS series, designed to provide effective motor protection. This thermal overload relay is suitable for use in a variety of industrial applications, offering a rated operational voltage of up to 690 V AC. It features a current range of 9.0 to 12.5 A, making it ideal for safeguarding motors against overload conditions. The device is equipped with both normally closed (1NC) and normally open (1NO) contacts, ensuring versatile integration into control circuits. With its compact dimensions of 45 x 85 x 85 mm, the 3RU2126-1KB0 is designed for easy mounting onto contactors, utilising screw-type terminals for secure electrical connections. Its IP20 protection rating ensures a degree of protection against solid objects, making it suitable for installation in controlled environments. The relay's thermal design and Class 10 trip class provide reliable performance, ensuring the longevity and efficiency of your motor systems.