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HPE S1J07A 50G QSFP56 to SFP56 Direct-Attach Copper Cable
Overview
The S1J07A is a 50G passive Direct-Attach Copper (DAC) cable connecting a QSFP56 port to an SFP56 port at 0.65 meters. At this length, it draws no active power — the copper twinax breakout handles signal integrity passively, which eliminates transceiver power budget concerns and reduces per-port cost compared to active optical solutions. It is purpose-built for short top-of-rack or cross-connect runs in high-density switching environments where rack space is minimal and port-to-port distance is under one meter.
Compatibility
Designed for HPE Aruba Networking switches and line cards with QSFP56 uplink ports paired to SFP56-equipped devices. Typical deployment pairing includes HPE Aruba CX series switches with QSFP56 uplinks connecting to SFP56-capable spine or breakout ports. Confirm port-type compatibility — QSFP56 is a 200G-capable form factor, but this cable operates at 50G per lane. Do not substitute for QSFP28 or SFP28 deployments without verifying electrical and form-factor compatibility with your switch vendor's network switch compatibility matrix.
Installation Notes
At 0.65m, routing flexibility is limited — plan your rack layout before ordering. This length suits same-rack or adjacent-rack connections only; for inter-rack runs, select a longer DAC variant or transition to active optics. Passive DAC cables require no firmware configuration and are hot-pluggable, but verify that your switch's SFP56 and QSFP56 ports are set to the correct speed mode. No tools required for installation.
HPE Aruba Networking 50G QSFP56 to SFP56 0.65m DAC Cable - S1J07A
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