Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC, 34-40 A Adjustable Current Range, 40 A Contact Rating 3RU2126-4FB0

Siemens 3RU2126-4FB0 SIRIUS 3RU2 Thermal Overload Relay is designed for reliable current-sensitive protection of three-phase motors with ratings up to 18.5 kW. Featuring an adjustable current range of 34 to 40 amperes, this relay supports 3-pole direct mounting and includes 1 normally open (NO) and 1 normally closed (NC) contact for enhanced control capabilities.

The relay contact current rating of 40 A ensures accommodation of industrial applications requiring robust switching under load. Its automatic and manual reset methods allow flexible operation suited to varied industrial processes. Rated IP55 and IP65, the enclosure provides protection against dust and water, suitable for demanding environments.

With a compact design featuring dimensions 87mm length, 45mm width, and 73mm depth, and operating temperature range from -40°C to 70°C, the device is engineered to maintain performance across diverse climatic conditions.

This overload relay includes 2 auxiliary contacts and uses screw terminals for secure electrical connections, enhancing installation and maintenance ease. The product complies with multiple international standards including WEEE, UKCA, UL, EAC, CCC, REACH, RoHS, IEC, and CE, ensuring global acceptance and environmental compliance.

Typically applied in industrial automation, manufacturing, HVAC systems, and motor-driven equipment, this Siemens thermal overload relay delivers effective motor protection, reducing downtime and equipment damage risks.

Adjustable current range from 34 to 40 amperes for flexible motor protection. Contact rating of 40 A suitable for various industrial control applications. Power rating of 18.5 kW for three-phase motors. Automatic and manual reset options for operational convenience.

IP55 and IP65 rated for protection against dust and water ingress. Supports direct mount type and 3-pole configuration. Includes 2 auxiliary contacts for additional control functions. Operating temperature range from -40°C to 70°C ensuring reliability in harsh environments.

Screw terminal type for secure and reliable electrical connections.

This Thermal Overload Relay is a critical component for electrical protection systems in industrial and commercial motor applications, delivering precise, reliable performance and conforming with global safety standards. Discover more products in Siemens electrical automation solutions on EnvMart.