Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC 20A F.L.C 3A Contact Rating 7.5 kW 3RU2136-4BB0

Siemens 3RU2136-4BB0 is a high-quality SIRIUS 3RU2 series Thermal Overload Relay designed for motor protection in industrial and commercial applications. It offers precise and reliable current-sensitive protection, capable of handling motor ratings up to 7.5 kW with a full load current of 20A. The relay includes a 3-pole configuration with 1 normally open (NO) and 1 normally closed (NC) contact, suitable for advanced control schemes.

This relay supports both automatic and manual reset methods, providing operators flexibility in control and safety. It features an adjustable current range from 14 to 20 Amperes, enabling accurate tuning to specific motor requirements. Mount type is direct with screw terminals for stable and secure electrical connections. The device complies with IP20 rating, ensuring adequate protection against solid foreign objects, and is rated for operating temperatures between -40°C and 70°C, making it suitable for diverse installation environments.

Additional functionalities include a switch position indicator, test function, stop button, and selector switch for reset modes, enhancing usability and maintenance. The robust design meets international standards including UL, IEC 81346-2, IEC 60068-2-27, IEC 60529, and CSA certifications, making it reliable for industrial, manufacturing, automation, and HVAC applications.

The compact dimensions (Width: 130 mm, Length: 55 mm, Depth: 91.2 mm) facilitate easy installation on DIN rails or surface mounts. This relay is manufactured in Germany, known for stringent quality control and engineering excellence.

Equipped with 1 normally open and 1 normally closed contact for versatile control. Adjustable current range from 14 to 20 A for precise overload protection. Supports motor power rating up to 7.5 kW with 3-pole configuration.

Features automatic and manual reset methods for flexible operation. Designed for direct mounting with screw terminal type connections. Built to IP20 standard for protection against solid objects larger than 12.5 mm. Operating temperature ranges from -40°C to 70°C ensuring performance in various environments.

Includes 2 auxiliary contacts for expanded control functionality. Complies with UL, IEC 81346-2, IEC 60068-2-27, IEC 60529, and CSA standards for safety and reliability.

Ideal for industrial motor protection, manufacturing automation systems, electrical control panels, HVAC systems, and other industrial control gear setups. Explore our range of relays and contactors for comprehensive electrical automation solutions on EnvMart.