QuickSpecs
HPE BladeSystem c-Class 40G QSFP+ Active Optical Cables QuickSpecs
High‑performance Active Optical Cables designed to deliver reliable 40Gb connectivity within HPE BladeSystem c‑Class environments.
These cables provide flexible, high‑speed QSFP+ to QSFP+ or QSFP+ to 4x10G SFP+ connectivity options optimized for BladeSystem interconnects.
They support efficient signal transmission over longer distances, ensuring consistent bandwidth and simplified data center integration.
![[IMAGE1]](https://assets.ext.hpe.com/is/image/hpedam/c04312724_block1img?$crimg$ "[IMAGE1]")
Models | |
| HPE BladeSystem c-Class 40G QSFP+ to QSFP+ 15m Active Optical Cable | 720211-B21 |
| HPE BladeSystem c-Class QSFP+ to 4x10G SFP+ 15m Active Optical Cable | 721076-B21 |
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Defective Media Retention
An option available with HPE Complete Care Service and HPE Tech Care Service and applies only to Disk or eligible SSD/Flash Drives replaced by HPE due to malfunction.
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For more information
| HPE BladeSystem c-Class 40G QSFP+ to QSFP+ 7m Active Optical Cable (720205-B21) | Connectivity | Length | 22.97 ft. (7 m) |
| Physical characteristics | Weight | 0.33 lb. (0.15 kg), Fully loaded the cable with a QSFP+ transceiver at each end of the cable | |
| Environment | Operating temperature | 32°F to 158°F (0°C to 70°C) | |
| Operating relative humidity | 0% to 85%, noncondensing | ||
| Non-operating/Storage temperature | −40°F to 185°F (−40°C to 85°C) | ||
| Non-operating/Storage relative humidity | 0% to 85%, noncondensing | ||
| Altitude | Up to 10,000 ft. (3 km) | ||
| Electrical characteristics | Notes | 1.5 watts maximum per transceiver end | |
| Notes | Electrical Properties Cable Characteristic Impedance: Non-conductive Crosstalk between pairs: 26 dB max Time delay: 1.57 nsec/ft o BER: 10–15 max Physical Properties Cable Diameter: 3 mm Minimum Cable Bend Radius: 25 mm | ||
| HPE BladeSystem c-Class 40G QSFP+ to QSFP+ 15m Active Optical Cable (720211-B21) | Connectivity | Length | 49.21 ft. (15 m) |
| Physical characteristics | Weight | 0.57 lb., Fully loaded the cable with a QSFP+ transceiver at each end of the cable | |
| Environment | Operating temperature | 32°F to 158°F (0°C to 70°C) | |
| Operating relative humidity | 0% to 85%, noncondensing | ||
| Non-operating/Storage temperature | −40°F to 185°F (−40°C to 85°C) | ||
| Non-operating/Storage relative humidity | 0% to 85%, noncondensing | ||
| Altitude | Up to 10,000 ft. (3 km) | ||
| Electrical characteristics | Notes | 1.5 watts maximum per transceiver end | |
| Notes | Electrical Properties Cable Characteristic Impedance: Non-conductive Crosstalk between pairs: 26 dB max Time delay: 1.57 nsec/ft o BER: 10–15 max Physical Properties Cable Diameter: 3 mm Minimum Cable Bend Radius: 25 mm | ||
| HPE BladeSystem c-Class QSFP+ to 4x10G SFP+ 7m Active Optical Cable (721070-B21) | Connectivity | Length | 22.97 ft. (7 m) |
| Physical characteristics | Weight | 0.56 lb. (0.25 kg), 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 | 32°F to 158°F (0°C to 70°C) | |
| Operating relative humidity | 5% to 85%, noncondensing | ||
| Non-operating/Storage temperature | −40°F to 185°F (−40°C to 85°C) | ||
| Non-operating/Storage relative humidity | 5% to 85%, noncondensing | ||
| Altitude | Up to 10,000 ft. (3 km) | ||
| Electrical characteristics | Notes | 1.5 Watts maximum QSFP+ cable end 0.35 Watts maximum SFP+ Cable end (each) | |
| Notes | Electrical Properties Cable Characteristic Impedance: Non-conductive Crosstalk between pairs: 26 dB max Time delay: 1.475 nsec/ft BER: 10E-15 max Physical Properties QSFP+ Cable Diameter: 3.4 mm SFP+ Cable Diameter: 3 mm QSFP+ Minimum Cable Bend Radius: 25 mm SFP+ Minimum Cable Bend Radius: 30 mm | ||
| HPE BladeSystem c-Class QSFP+ to 4x10G SFP+ 15m Active Optical Cable (721076-B21) | Connectivity | Length | 49.21 ft. (15 m) |
| Physical characteristics | Weight | 0.74 lb. (0.34 kg), 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 | 32°F to 158°F (0°C to 70°C) | |
| Operating relative humidity | 5% to 85%, noncondensing | ||
| Non-operating/Storage temperature | −40°F to 185°F (−40°C to 85°C) | ||
| Non-operating/Storage relative humidity | 5% to 85%, noncondensing | ||
| Altitude | Up to 10,000 ft. (3 km) | ||
| Electrical characteristics | Notes | 1.5 Watts maximum QSFP+ cable end 0.35 Watts maximum SFP+ Cable end (each) | |
| Notes | Electrical Properties Cable Characteristic Impedance: Non-conductive Crosstalk between pairs: 26dB max Time delay: 1.475 nsec/ft BER: 10E-15 max Physical Properties QSFP+ Cable Diameter: 3.4 mm SFP+ Cable Diameter: 3 mm QSFP+ Minimum Cable Bend Radius: 25 mm SFP+ Minimum Cable Bend Radius: 30 mm | ||
| 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 web site. 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. | ||
| Date | Version History | Action | Description of Change |
|---|---|---|---|
| 16-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. | |
| 26-Nov-2018 | Changed | Technical Specifications were updated | |
| 05-Feb-2018 | Changed | Models section was updated. | |
| 26-Oct-2016 | Changed | Rebranding edition. | |
| 09-Feb-2015 | Added | SKUs added on models section: 721070-B21, 721073-B21, 721076-B21 | |
| Changed | QuickSpecs name changed from "HPE BladeSystem c-Class 40G QSFP+ to QSFP+ Active Optical Cable" to "HPE BladeSystem c-Class 40G QSFP+ Active Optical Cables" Overview, Technical Specification sections were updated | ||
| 10-Jun-2014 | New | Initial version |
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c04312724, 14978 - Worldwide - V8 - 16-February-2026