Depth Adapter Kit 1U for Server Racks StarTech RDA1U — 45×101×21 mm, 40 kg, 2 pcs, black

The StarTech RDA1U Depth Adapter Kit 1U for Server Racks is a pair of black rail extenders designed to adjust the effective mounting depth of a single rack unit (1U). Each adapter measures 45 × 101 × 21 mm and is rated to support up to 40 kg in a four-post installation. The kit enables mounting equipment that is up to four inches longer or shorter than the rack's original mounting depth and is supplied as two pieces for use on both sides of a 1U position. This product is TAA compliant and is intended for professional rack installations requiring depth flexibility.

Advantages

The adapter kit provides a simple mechanical solution to mismatched rail spacing without modifying existing rack rails. It supports consolidated mounting of devices with different depths, reducing the need for additional racks. In four-post configurations the adapters carry a substantial load capacity, and when used in two-post setups they offer a defined lower load rating suitable for lighter equipment. The low-profile black finish maintains a uniform rack appearance while offering an option to position equipment inward for improved cable routing and strain reduction.

Suitable for

• Adjusting rail mounting depth for servers and rack-mounted equipment
• Mounting patch panels, PDUs, or switches with dense cable routing
• Consolidating devices of differing depths into a single rack
• Professional data center and server room rack installations requiring TAA-compliant components

Key specifications

• Material finish: black
• Quantity: 2 pieces (pair)
• Adapter dimensions (W × D × H): 45 × 101 × 21 mm each
• Maximum load capacity (four-post installation): 40 kg
• Maximum extension/reduction of mounting depth: up to 4 inches (approx. 101 mm)
• Maximum load capacity (two-post installation): 4.5 kg
• Compliance: TAA (meets US Federal Trade Agreements Act requirements)

How to use

Install the two adapters at the 1U position by aligning them with the rack rail holes and fastening with appropriate rack screws and hardware. Use both pieces to ensure balanced support across the unit. For four-post racks, place the extenders on the front and rear rails as needed to achieve the desired mounting depth; for two-post racks, use the extenders according to the lighter load limitations. Verify all fasteners are tightened and check that mounted equipment is level and secure before applying power or connecting network and power cabling.

Usage recommendations

Confirm the load requirements of your equipment and the installation type (two-post vs. four-post) before mounting. For heavy equipment, prefer four-post installations and consider using two sets of extender brackets if additional depth stability is required. Route and secure cables to minimize strain on connectors when devices are positioned inward from the rack rails. Follow rack manufacturer torque and fastening specifications when installing the adapters.