Detailed Specifications
HPE J9285B - 10 Gb/s SFP+ to SFP+ Passive Twinax Direct-Attach Cable (7 m)
Overview
The HPE J9285B is a fixed-length passive twinax (copper) direct-attach cable (DAC) with SFP+ connectors on each end, supporting 10 Gb/s data rates over a 7-metre span. It's designed for high-density interconnects within racks or between adjacent racks where fibre may be over-spec or where power/latency must be minimal. For a network engineer, this means when you have two SFP+ ports (on switches, servers or stJ9285Borage) within approximately 7 m of each other, you can use the J9285B to link them directly rather than separately buying SFP+ transceivers + patch cables + multimode fibre.
Key Features
Supports 10 Gb/s throughput via SFP+ on both ends × designed for short-reach copper twinax application
Fixed length of 7 metres (~22.97 ft) which gives flexibility for inter-rack or mid-rack connections without extra fibre components.
Plug-and-play SFP+ form-factor, no separate modules required × simplifies deployment and inventory for high-density racks.
Supported in many HPE/Aruba switch models and compatibility guidance exists × but note: some platforms explicitly do not support the 7 m length version.
Technical Specifications
| Specification | Detail |
|---|
| Brand | HPE (Hewlett Packard Enterprise) |
| Part Number | J9285B |
| Product Type | 10 Gb/s SFP+ to SFP+ Passive Twinax DAC Cable |
| Key Specification | Data Rate: 10 Gb/s |
| Key Specification | Length: 7 metres (~22.97 ft) |
| Key Specification | Interface: SFP+ ↔ SFP+ |
| Cable Type | Twinax copper (passive) |
| Compatibility Notes | Some switch models do not support 7 m DACs × check compatibility list |
