Siemens 3RU1146-4FB0 Thermal Overload Relay 28-40A Size S3

Product Description

The SIEMENS 3RU1146-4FB0 is a thermal overload relay designed for motor protection with an adjustable current range of 28 to 40 amps and a Class 10 trip rating. This Size S3 relay features screw terminals for main and auxiliary circuits and is intended for contactor mounting. It provides phase loss sensitivity and manual-automatic reset functionality.

• Adjustable current range: 28 to 40 A
• Trip class: 10
• Auxiliary contacts: 1 NC, 1 NO

Product Highlights

Thermal overload relay with adjustable current range for motor protection. Features screw terminals and contactor mounting.

Product Information

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RU1146-4FB0
• Country of Origin: United States

Technical Specifications

• MPN: 3RU1146-4FB0
• Brand: Siemens
• Category: Motor Control
• Item Subcategory: Overload Relay
• Family: Sirius
• Type: 3RU11
• Relay Style: Thermal
• Amperage Maximum: 40
• Amperage Minimum: 28
• Number of Poles: 3
• Main Circuit Connection: Screw terminal
• Auxiliary Circuit Connection: Screw terminal
• Rated Insulation Voltage: 1000 V
• Surge Voltage Resistance: 8 kV
• Auxiliary Contacts: 1 NC, 1 NO
• Mounting: Contactor mounting, rotatable +/-135°
• Short-Circuit Protection: Requires gG fuse links (80 A or 160 A depending on coordination)
• Protection Class: IP20 (front)