SlimSAS SFF-8654 4i to SFF-8654 4i Internal SAS 4.0 Cable
The SlimSAS SFF-8654 4i to SFF-8654 4i Cable is a compact internal SAS 4.0 interconnect designed for high-speed connections between compatible controllers, storage devices, and server backplanes. With 100-ohm impedance and 32AWG conductors, it is optimized for reliable signal transmission in space-constrained server and storage systems.
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Description
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Specification
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Features
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Application
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Custom Service
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FAQ
The SlimSAS SFF-8654 4i to SFF-8654 4i Internal SAS Cable is a high-density internal storage interconnect designed for SAS 4.0 systems requiring reliable, high-speed connections between compatible storage components. Featuring SFF-8654 4i connectors at both ends in a straight-to-straight configuration, it provides a direct link between SAS host bus adapters, RAID controllers, storage devices, and server backplanes while maintaining a compact form factor for modern server and storage platforms.
With 100-ohm controlled impedance and 32AWG conductors, the cable is designed to maintain signal integrity for high-speed SAS transmission while allowing efficient routing inside space-constrained chassis. It is suitable for direct-attached storage, enterprise servers, data center infrastructure, workstations, and other storage systems where compact internal cabling and high-speed SAS connectivity are required.| Protocol | SAS 4.0 |
|---|---|
| Data Rate | Up to 24Gb/s per channel |
| Connector A | SFF-8654 4i SlimSAS | Straight |
| Connector B | SFF-8654 4i SlimSAS | Straight |
| Connector Configuration | Straight to Straight |
| Impedance | 100 Ohms |
| Cable Gauge | 32AWG |
| Cable Length | 0.5m to 1m |
- SFF-8654 4i connector on both ends
- Straight-to-straight internal SAS cable configuration
- Designed for SAS 4.0 connectivity
- Supports data rates up to 24Gb/s per channel
- 100-ohm controlled impedance
- 32AWG conductors for compact internal routing
- High-density design for space-constrained server chassis
- Direct connection between compatible SAS components
- Designed for reliable high-speed signal transmission
- Suitable for enterprise storage and server platforms
- SAS 4.0 server storage systems
- RAID controller to backplane connections
- Host bus adapter to storage device connections
- Direct-attached storage systems
- Enterprise data centers
- Server and storage chassis
- Workstations with internal SAS storage
- High-performance storage infrastructure
- Internal SAS backplane connectivity
OEM and customized SlimSAS internal SAS cables are available for different server and storage platform requirements. Cable length, conductor specifications, shielding configuration, jacket material, connector orientation, and other mechanical or electrical parameters can be customized according to project requirements.
Custom labeling, packaging, cable identification, and private-label production are also available for OEM and volume orders. Customized cable assemblies can be developed according to customer drawings, equipment interfaces, technical specifications, or samples to help ensure compatibility with the target system.
What does “4i” mean in SFF-8654 4i?
The “4i” designation refers to a four-lane internal connector configuration. Each lane provides an independent high-speed serial connection, allowing the cable to aggregate multiple SAS channels through a compact connector interface.
Can this cable connect any two SFF-8654 devices?
Not necessarily. Although both ends use SFF-8654 4i connectors, physical connector compatibility does not guarantee that two devices use the same pinout, lane assignment, or SAS architecture. The host adapter, controller, backplane, and storage device specifications should be checked before deployment.
What is the benefit of 100-ohm controlled impedance?
High-speed serial interfaces require controlled electrical characteristics to minimize signal reflections and distortion. A 100-ohm impedance design helps maintain the expected transmission-line characteristics of the SAS interface and contributes to reliable signal integrity at high data rates.
Does cable length affect SAS 4.0 performance?
Yes. As transmission speed increases, cable length and overall channel quality become more important. Longer internal connections can introduce greater insertion loss and signal degradation, so the cable length should be selected according to the system design and the electrical requirements of the connected SAS components.
Can the cable be used with earlier SAS generations?
Compatibility depends on the connectors, pinout, controller or backplane design, and the capabilities of the connected devices. SAS is designed with backward-generation interoperability in mind at the protocol level, but the specific SlimSAS implementation and system architecture should always be verified before installation.
