Depth Adapter Kit StarTech.com RDA1U

The StarTech.com Depth Adapter Kit RDA1U lets you expand or reduce the mounting depth of a single rack unit (1U) by up to 4 inches, enabling installation of equipment that is longer or shorter than the rack's fixed depth. The kit includes two adapters and is designed for use in both two-post and four-post server rack installations. It is TAA compliant for government GSA Schedule purchases and is covered by a 2-year warranty with free lifetime technical support.

Advantages

The adapter kit provides flexible mounting options for mixed-depth equipment within a single rack, helping consolidate devices and reduce the need for multiple racks. In two-post installations the extenders support up to 10 lbs (4.5 kg) total, while in four-post installations they support up to 90 lbs (40 kg); using two sets of extender brackets in a four-post rack maintains the same weight capacity. The kit also helps with cable management by allowing equipment to be positioned 4" in from the rails to reduce cable protrusion and strain on high-density cabling such as patch panels, PDUs, or network switches.

Suitable for

• Mounting 1U equipment that is up to 4 inches longer than the rack depth
• Mounting 1U equipment that is up to 4 inches shorter than the rack depth
• Two-post and four-post server rack installations
• Patch panels, PDUs and network switches with high-density cabling

Key specifications

• Manufacturer: StarTech.com
• Model / MPN: RDA1U
• Unit type: 1U rail depth adapter kit (includes 2 adapters)
• Depth adjustment: up to 4 inches (≈101 mm)
• Weight capacity: two-post: 10 lbs (4.5 kg) total; four-post: 90 lbs (40 kg) total
• Dimensions (per adapter): Width 45 mm, Depth 101 mm, Height 21 mm
• Compliance: TAA compliant
• Warranty: 2-year warranty; free lifetime technical support

How to use

Install the adapter brackets into the rack rails at the desired position to extend or reduce the mounting depth by up to 4 inches. Secure the equipment to the adapters according to the rack and device mounting instructions, observing the specified weight limits depending on whether the installation is two-post or four-post. For four-post installations, you may install a second set of extender brackets if needed while maintaining the same rated capacity.

Usage recommendations

Use the RDA1U to consolidate mixed-depth 1U devices into a single rack and to improve cable routing for equipment with dense cabling. Do not exceed the stated weight limits for two-post or four-post installations, and follow standard rack mounting safety practices.