The SIEMENS 3RU2146-4HB0 thermal overload relay is designed to protect motors operating in the 36 to 50 A current range. It offers precise and reliable protection against overloads and phase failures, ensuring optimal motor safety and system uptime in demanding industrial environments. It integrates seamlessly with Siemens 3RT contactors for compact and efficient motor starter solutions.

   Key Features:

• Adjustable current range: 36 A to 50 A

• Built-in phase failure protection

• Trip Class 10 for fast overload response

• Selectable manual or automatic reset

• Ambient temperature compensation for stable operation

• Test and reset buttons for easy maintenance and diagnostics

• Direct mounting on Siemens 3RT contactors

• DIN rail mountable

• Compliance with IEC/EN 60947-4-1 standards