Amphenol FCI SAS/PCIe® 6.0 (U.2/SFF8639) Connector

Amphenol FCI SAS/PCIe® 6.0 (U.2/SFF8639) Connector features high-speed 64Gb/s PAM4 design for next-generation servers and storage. This connector features a 68‑position receptacle and plug, which enables the implementation of a high‑speed Serial Attached SCSI (SAS) hard disk drive (HDD) interface. The SAS/PCIe 6.0 (U.2/SFF8639) connector also supports implementation of Peripheral Component Express (PCIe®) based devices. This connector provides a molded guidepost that allows the device plug and receptacle to self-align during mating.

The SAS/PCIe® 6.0 (U.2/SFF8639) connector features a halogen-free, high-temperature thermoplastic to withstand diverse conditions. This connector offers a durability of 500 mating cycles. Typical applications include HDD, HDD carrier, external storage system, interposer card, server, and storage server.

Features

  • Compatible with the SFF8639 specification
  • Receptacles are inter-mateable with unshielded dual-port SFF8680 (SAS 3.0/SAS 4.0) connectors
  • Flexibility in component selection
  • Enables SFF8630, SFF8680, and SFF8432 interface
  • Implementation of high-speed Solid State Drives (SSDs) and Hard Disk Drives (HDDs) allows compatibility between unshielded dual and multiport interfaces
  • Backward compatible with 12Gb/s, 6Gb/s SAS, and U.2 Gen 4/5 connectors
  • Same interface can be used for cost-effective storage HDDs as well as higher-performance server SSDs
  • Up to 4-port 64Gb/s (PAM4) PCIe-based devices improve performance and faster file transfers
  • Supports both SAS and U.2 NVME drives
  • Staggered contact lengths provide sequential contact mating for hot plugging
  • Stamped clips act as connector retainers for robust PCB attachment, providing additional mechanical strength after soldering
  • Molded guideposts help mating halves to self-align by providing angled lead-ins, which compensate for connector misalignment

Applications

  • HDD
  • HDD carrier
  • External storage system
  • Interposer card
  • Mezzanine card
  • Server
  • Storage server
  • Processor and storage blade

Specifications

  • Electrical performance:
    • 30mΩ maximum contact resistance for signal contacts, per EIA 364-23
    • 1.5A minimum current rating per contact with temperature rise not exceeding 30°C (P1 to P15 power pins only), per EIA 364-70B
    • 1000MΩ minimum insulation resistance, per EIA 364-21
  • Mechanical performance:
    • 500 mating cycles durability
    • 59N maximum mating force
    • 6N minimum unmating force
  • Material:
    • Copper alloy contact base metal
    • Gold over nickel contact area plating
    • Tin over nickel solder tail plating
    • Copper alloy retainer clip base metal
    • Tin over nickel retainer plating
    • Halogen-free, high-temperature thermoplastic (UL 94V-0), and black housing
Published: 2026-04-30 | Updated: 2026-05-05