Siemens 3RA29221A Standard Mounting Rail

Product Description

The SIEMENS 3RA29221A is a standard mounting rail designed to provide a secure, organized foundation for mounting electrical components within control panels, enclosures, and industrial switchgear assemblies. This rail supports the proper alignment and spacing of contactors, overload relays, and other DIN-style devices, keeping wiring neat and accessible. Weighing 0.229 pounds and measuring 10.433 inches in length, 1.772 inches in width, and 1.102 inches in height, it fits cleanly into standard enclosure builds. Installation is typically handled by licensed electricians and industrial controls technicians during panel assembly or retrofit work.

This mounting rail is suited for use in residential, commercial, and light industrial electrical control panels. It is commonly installed in motor control centers, automation enclosures, and distribution assemblies where reliable component mounting is required. The compact dimensions make it practical for tight panel layouts while maintaining proper component clearance and accessibility for future servicing.

Key Features

• Standard DIN-style mounting rail for organizing electrical control components
• Compact length of 10.433 inches fits standard enclosure form factors
• Lightweight at 0.229 pounds for easy handling during panel builds
• Sold as 1 per pack

Compatibility

Designed as an OEM-style mounting rail for use with Siemens contactors, overload relays, and compatible DIN-mount electrical control components in standard panel enclosures.

Installation Notes

Installation should be performed by a qualified electrician in accordance with applicable NEC guidelines. Always de-energize the enclosure and verify the absence of voltage before beginning panel assembly or component mounting. Secure the rail using appropriate fasteners for the enclosure backplate material. Do not exceed the load-bearing capacity of the enclosure or rail mounting points.

Technical Specifications

• Length: 10.433 inches
• Width: 1.772 inches
• Height: 1.102 inches
• Weight: 0.229 pounds
• Quantity per Pack: 1
• UPC: 66264390482

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RA29221A