Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC, 12.5A, 9 A FLC, 12.5A Contact Rating, 5.5 kW 3RU2116-1KB0

Siemens 3RU2116-1KB0 Thermal Overload Relay is engineered for reliable protection of electric motors by interrupting excessive current flow via its thermal bimetallic release mechanism. This overload relay features a motor full load current (FLC) adjustable range from 9 to 12.5 amperes, supporting a power rating of 5.5 kW with a relay contact current capacity of 12.5A.

The product includes one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, arranged in a three-pole configuration. Its direct mount design allows easy installation onto Sirius 3RU2 series contactors. The relay supports both automatic and manual reset functions via a selector switch, enhancing flexibility in operation and maintenance.

Safety and durability are enhanced by an IP20-rated, touch-proof housing protecting users from accidental contact. The device performs robustly across extreme temperatures from -40°C to +70°C, making it suitable for demanding industrial, marine, and medical applications.

Screw terminals ensure secure electrical connections resilient against vibration, contributing to system reliability. Its compact construction measures 87 mm in length, 45 mm in width, and 73 mm in depth, facilitating installation in constrained spaces.

Certified to multiple international standards including IEC 81346-2, UL, CCC, CE, CSA, EAC, IEC 60068-2-27, IEC 60529, and IEC 61508, this relay meets stringent quality and safety requirements. Originating from Germany, it exemplifies high manufacturing standards.

Equipped with 1 NO and 1 NC contact configuration for safety. Supports a rated relay contact current of 12.5A. Designed for three-pole direct mount installation on contactors. Features automatic and manual reset methods for flexible operation.

Screw terminal type ensures stable and vibration-resistant connections. IP20 rated housing providing touch-proof protection for safety. Operates reliably in a temperature range of -40°C to 70°C. Compact dimensions of 87mm length, 45mm width, and 73mm depth.

Complies with international safety and quality standards including IEC, UL, CCC, CE, CSA, and EAC. Manufactured in Germany ensuring high quality and durability.

This thermal overload relay is ideal for use in various industrial settings including manufacturing, automation, HVAC, marine engineering, and medical equipment protection. Environmentally resistant and compact, it ensures long-term motor safety and system uptime.

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