Siemens 3RA1963-2A Contactor Bus Bar

Product Description

The SIEMENS 3RA1963-2A is a contactor bus bar designed to connect and group multiple contactors into a single, organized assembly. It serves as a rigid interconnect component within motor control centers, control panels, and industrial switchgear enclosures. The bus bar simplifies wiring by providing a direct electrical bridge between adjacent contactors, reducing the need for individual jumper wires. At 10.827 inches long, 4.606 inches wide, and 2.165 inches tall, it is sized for multi-pole contactor groupings. Weighing 5.291 pounds, the assembly is robust enough for permanent panel installation. Electricians and industrial controls technicians are the primary installers of this component.

This bus bar is used in industrial and commercial electrical distribution systems where SIEMENS contactors are mounted side by side in a panel or motor control center. It is suited for applications requiring reliable power distribution across grouped contactors, including motor starter assemblies, pump controls, and HVAC equipment control panels. The 3RA1963-2A is a factory-style solution that supports clean, code-compliant panel layouts in both new installation and retrofit scenarios.

Key Features

• Rigid bus bar construction provides secure, low-resistance electrical interconnection between adjacent contactors
• Eliminates individual jumper wiring between grouped contactors, reducing installation time and potential failure points
• Compact profile at 10.827 inches x 4.606 inches x 2.165 inches fits standard panel and MCC configurations
• Substantial 5.291-pound construction supports permanent, vibration-resistant mounting
• OEM SIEMENS component ensures dimensional and electrical compatibility within SIEMENS contactor assemblies

Compatibility

Designed as an OEM-style bus bar accessory for use with SIEMENS contactor assemblies. Specific compatible contactor models or series were not provided in the available product data. Verify fitment against the target contactor frame size and series before ordering.

Installation Notes

Installation should be performed by a licensed electrician familiar with industrial control panel wiring and applicable NEC requirements. De-energize and lock out the panel before installing or removing any bus bar or contactor component. Confirm that the bus bar orientation and pole alignment match the mounted contactors before securing. Do not apply power until all mechanical connections are verified as fully seated and torqued per the contactor manufacturer documentation.

Technical Specifications

• Length: 10.827 inches
• Width: 4.606 inches
• Height: 2.165 inches
• Weight: 5.291 pounds
• Package Quantity: 1 per pack
• UPC: 04089255329

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RA1963-2A