The SIEMENS 3RU2146-4KB0 thermal overload relay is designed for reliable motor protection in the 57 to 75 A current range. It safeguards motors from overload and phase failure conditions, helping to minimize downtime and extend equipment lifespan. Ideal for demanding industrial environments, this relay integrates directly with Siemens 3RT contactors for efficient motor control.

      Key Features:

• Adjustable current range: 57 A to 75 A

• Built-in phase failure protection for comprehensive motor safety

• Trip Class 10 for fast and accurate overload protection

• Selectable manual or automatic reset functionality

• Ambient temperature compensation for consistent operation

• Test and reset buttons for quick on-site diagnostics

• Direct mounting on Siemens 3RT contactors

• DIN rail compatible design

• Standards compliance: IEC/EN 60947-4-1