SAS cable MICROCHIP 2305300-R SlimSAS ×8 (SFF-8654) to 2× 4SFF-8639 (U.3) 0.8 m Black

Microchip Technology SlimSAS ×8 (SFF-8654) to 2× 4SFF-8639 (U.3) 0.8 m cable is an internal high-density interconnect designed for direct-attach server and storage applications. The cable features a SlimSAS ×8 SFF-8654 plug on one end and two 4SFF-8639 (U.3) connectors on the other, enabling connection between host adapters and U.3 storage drives or backplanes. Its 0.8 m length and compact black jacket with multicolour internal wiring make it suitable for neat routing inside racks and chassis while supporting tri-mode operation for SAS, SATA and NVMe devices.

Advantages

The cable provides a single-cable solution to split a SlimSAS ×8 interface into two U.3 4-lane connectors, reducing the number of required ports on host adapters and simplifying internal cabling. Its SFF-8654 and SFF-8639 form factors are industry-standard, ensuring compatibility with modern server and storage backplanes. The 0.8 m length balances reach and signal integrity in dense server environments, and the multiconductor internal wiring supports reliable high-speed data transfer across SAS, SATA and NVMe protocols.

Suitable for

• Connecting SAS/SATA/NVMe host adapters with SlimSAS ×8 ports to U.3 (4SFF-8639) drives or backplanes
• Internal cabling in rack servers, storage enclosures and JBOD units
• Upgrade or replacement cabling in data center storage systems requiring tri-mode connectivity

Key specifications

• Connector A: SlimSAS ×8 (SFF-8654) internal plug
• Connector B: 2 × 4-lane SFF-8639 (U.3) internal plugs
• Supported protocols: SAS, SATA, NVMe (tri-mode compatibility)
• Cable length: 0.8 m
• Cable jacket colour: black with multicolour internal wiring
• Application: internal direct-attach server and storage interconnect

How to use

Power down the server or storage enclosure according to manufacturer procedures before installing the cable. Insert the SlimSAS ×8 (SFF-8654) plug into the host adapter or HBA SlimSAS port, and connect the two 4SFF-8639 (U.3) plugs to the corresponding drive or backplane connectors, ensuring proper orientation and secure engagement. Route the cable to avoid sharp bends and to maintain clearance from hot components or moving parts. After installation, power on the system and verify device recognition in firmware or operating system storage management utilities.

Recommendations

For optimal signal integrity, avoid tight looping or kinking of the cable and keep the length within recommended chassis routing paths. Use in systems that support tri-mode U.3 connectors to ensure compatibility across SAS, SATA and NVMe drives, and consult server or backplane documentation for correct port mapping and any required firmware settings.