Siemens 3RA1921-1AA00 Msp Connecting Link

Product Description

The SIEMENS 3RA1921-1AA00 is a motor starter connecting link designed to join manual starter protectors (MSPs) in multi-unit assembly configurations. This accessory provides a mechanical and electrical bridge between adjacent MSP units, allowing them to be grouped into a compact, bus-connected assembly on a common mounting rail. Electricians and industrial control panel builders use this link when building out motor control centers or multi-motor starter banks. The part ships as a single unit and weighs 0.082 pounds, with a package footprint of 4.173 inches by 2.480 inches by 1.850 inches.

This connecting link is intended for use in industrial electrical control panels where multiple MSP units must be ganged together. Typical applications include motor control centers, machine tool control cabinets, and panel assemblies where space-saving side-by-side MSP mounting is required. The link supports clean, organized wiring layouts and reduces the need for discrete jumper wiring between adjacent starters.

Key Features

• Mechanically connects adjacent MSP units for grouped assembly mounting
• Eliminates discrete jumper wiring between side-by-side motor starter protectors
• Compact form factor suited for dense control panel installations
• Lightweight at 0.082 pounds for easy handling during panel build
• Sold as a single unit per pack

Compatibility

Designed as an OEM-style accessory connecting link for use with compatible SIEMENS manual starter protector (MSP) units in grouped assembly configurations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements and the panel manufacturer guidelines. De-energize and lock out the control panel before installing or removing any MSP accessories. Verify that all MSP units being linked are correctly seated on the DIN rail before securing the connecting link. Do not force the link into position, as misalignment can damage the MSP contact interfaces.

Technical Specifications

• Weight: 0.082 pounds
• Package Length: 4.173 inches
• Package Width: 2.480 inches
• Package Height: 1.850 inches
• Quantity per Pack: 1
• UPC: 75455489906

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RA1921-1AA00