QuickSpecs
HPE BladeSystem c-Class 40G QSFP+ to 4x10G SFP+ Direct Attach Copper Splitter Cable QuickSpecs
Table of Contents
40G QSFP+ to 4×10G SFP+ DAC splitter cable for cost‑effective, low‑latency fan‑out in HPE BladeSystem c‑Class.
This 3‑meter DAC splitter (721064‑B21) provides a simple 40GbE QSFP+ to 4×10GbE SFP+ breakout, streamlining cabling and lowering power and cost in BladeSystem c‑Class setups. It’s ideal for short‑reach, in‑rack links between interconnect modules, switches, and 10GbE adapters, and delivers consistent low‑latency performance inherent to direct‑attach copper designs.
Overview
| Platform Information- Models | |
| Models | |
| HPE BladeSystem c-Class 40G QSFP+ to 4x10G SFP+ 3m Direct Attach Copper Splitter Cable | 721064-B21 |
Service and Support
For the most up-to-date information on HPE Services, please refer to the HPE Services – Supplemental QuickSpecs, which provides a comprehensive and regularly updated overview of available services.
Technical Specifications
| HPE BladeSystem c-Class 40G QSFP+ to 4x10G SFP+ 3m Direct Attach Copper Splitter Cable (721064-B21) | Connectivity | Length | 9.84 ft. (3 m) |
| Physical characteristics | Weight | 1.62 lb., Fully loaded the cable with a QSFP+ transceiver at one end and 4 SFP+ transceivers at the other end of the cable | |
| Environment | Operating temperature | 32ºF to 158ºF (0ºC to 70ºC) | |
| Operating relative humidity | 5% to 95%, noncondensing | ||
| Non-operating/Storage temperature | -4ºF to 176ºF (-20ºC to 80ºC) | ||
| Non-operating/Storage relative humidity | 5% to 95%, noncondensing | ||
| Altitude | Up to 10,000 ft. (3 km) | ||
| Electrical characteristics | Notes | 0.042 watts maximum at QSFP+ transceiver end 0.011 watts at each SFP+ transceiver end | |
| Notes | Electrical Properties | ||
| | Cable Characteristic Impedance: 100 ohms | ||
| | Crosstalk between pairs: 26 dB max | ||
| | Time delay: 1.32 nsec/ft | ||
| | BER: 10-15 max | ||
| | Physical Properties | ||
| | Cable Diameter: 0.175" for each SFP+ fan out cable | ||
| | Minimum Cable Bend Radius SFP+ end: 0.7" | ||
| | Minimum Cable Bend Radius QSFP+ end: 1.78" | ||
| Operating System and Virtualization Support | The Operating Systems supported by this adapter are based on the server OS support. Please refer to the OS Support Matrix at https://www.hpe.com/us/en/servers/server-operating-systems.html. | ||
| Environment-friendly Products and Approach—End-of-life Management and Recycling | Hewlett Packard Enterprise offers end-of-life product return, trade-in, and recycling programs, in many geographic areas, for our products. Products returned to Hewlett Packard Enterprise will be recycled, recovered or disposed of in a responsible manner. The EU WEEE Directive (2012/19/EU) requires manufacturers to provide treatment information for each product type for use by treatment facilities. This information (product disassembly instructions) is posted on the Hewlett Packard Enterprise website. These instructions may be used by recyclers and other WEEE treatment facilities as well as Hewlett Packard Enterprise OEM customers who integrate and re-sell Hewlett Packard Enterprise equipment. | ||
Summary of Changes
| Date | Version History | Action | Description of Change |
|---|---|---|---|
| 21-Sep-2026 | Changed | QuickSpecs maintenance updates. | |
| 02-Feb-2026 | Changed | New branding applied to document. | |
| 04-Dec-2023 | Changed | Service and Support section was updated. | |
| 15-Nov-2021 | Changed | Service and Support section was updated. | |
| 15-Oct-2018 | Changed | Models section was updated. | |
| 04-Jun-2018 | Changed | Models section was updated. | |
| 26-Oct-2016 | Changed | Rebranding edition. | |
| 17-Aug-2015 | Changed | Overview section was updated. | |
| 10-Jun-2014 | New | Initial version. |
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c04312722, - 14977 - Worldwide - V9 - 21-September-2026