3RU1146-4LB0 - Siemens Sirius Thermal Overload Relay 70-90A Class 10

3RU1146-4LB0

3RU1146-4LB0 is a Siemens Sirius thermal overload relay designed for three-phase motor protection with adjustable amperage settings and reliable trip characteristics.

This IEC-rated overload relay is engineered for current-dependent protection of motors under normal startup conditions. The relay features screw terminal connections for both main and auxiliary circuits, ensuring secure and reliable electrical connections. It mounts directly to Siemens 3RT1 size S3 contactors, including compatibility with 3RT1044, 3RT1045, and 3RT1046 models. The thermal design provides consistent protection against overload conditions while accommodating standard motor inrush currents.

• Amperage Range: 70 to 90 AMPS adjustable
• Trip Class: Class 10
• Motor Protection: Three-phase motors
• Size: S3
• Mounting: Direct contactor mounting
• Main Circuit: Screw terminal
• Auxiliary Circuit: Screw terminal
• Phase Loss Sensitivity: Yes
• IEC Rated: Yes

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Specifications

• Part Number: 3RU1146-4LB0
• Manufacturer : Siemens
• Brand : Siemens
• Category : Motor Control
• Item Subcategory : Overload Relay
• Relay Style : Thermal
• Amperage Maximum : 90
• Amperage Minimum : 70

Product Data

• UPC : 075455441259
• GTIN : 00754554412597
• Weight : 10