The SIEMENS 3RU2146-4FB0 thermal overload relay is designed for motor protection within the 28 to 40 A current range. It provides accurate and reliable protection against overloads and phase failures, helping to extend motor lifespan and ensure uninterrupted operation. Ideal for industrial applications, it is fully compatible with Siemens 3RT contactors.

    Key Features:

• Adjustable current range: 28 A to 40 A

• Integrated phase failure protection

• Trip Class 10 for fast motor disconnection during overloads

• Manual and automatic reset modes

• Ambient temperature compensation for consistent protection

• Built-in test and reset buttons for easy operation and diagnostics

• Direct mounting on Siemens 3RT contactors

• DIN rail compatible design

• Conforms to IEC/EN 60947-4-1 standards