Description

This hybrid Mini‑SAS HD assembly links a 36‑position SFF‑8644 external plug to a 36‑position SFF‑8643 internal plug, providing a straight‑through x4 connection between RAID/HBA controllers and internal drive backplanes or expanders. Typical uses include bridging a controller with an external HD port to an in‑chassis SAS backplane, stacking chassis, or routing from a host to a JBOD where the storage interface is internal. Designed for SAS 3.0 signaling, the cable supports up to 12 Gb/s per lane and remains backward compatible with 6G and 3G devices; the final link rate depends on the attached hardware.

Farsince manufactures this cable with low‑skew 28 AWG twinax pairs that are individually shielded and impedance‑controlled to 100 ohms for stable performance in dense rack environments. Metal backshells, a pull‑tab latch on the 8644 side and a positive‑latch 8643 plug secure the connection and simplify service. The compact HD form factor improves panel density and airflow. Standard lengths cover common rack‑to‑chassis runs, and we offer OEM customization for length, gauge, labeling and harness integration to fit project layouts.

Specifications

• Product Type: Mini‑SAS HD hybrid cable, SFF‑8644 external to SFF‑8643 internal
• Host Interface: SFF‑8644, 36‑position, 4‑lane
• Device Interface: SFF‑8643, 36‑position, 4‑lane
• Cable Direction: Straight‑through multilane (4x)
• Application: Connect SAS HBA/RAID with 8644 to internal backplanes/expanders
• Data Rate: Up to 12 Gb/s per lane (SAS 3.0); backward compatible with 6G/3G
• Impedance: 100 Ω differential (nominal)
• Wire Gauge: 28 AWG twinax pairs
• Cable Length: 1 m standard; 0.5–3 m options
• Cable Structure: Individually shielded pairs; overall foil + braid; metal backshells
• Installation: Pull‑tab latch on 8644, positive‑latch 8643 for secure mating
• Compatibility: SAS HBAs/RAID, expanders, JBOD/DAS shelves; SATA pass‑through where supported
• Compliance: RoHS, REACH
• Customization: Length, AWG, labeling, sleeving and harness integration