• HPE 720199-B21 3m 40G QSFP+ to QSFP+ DAC black cable
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HPE

HPE 720199-B21 | BladeSystem c-Class 40G QSFP+ DAC Cable, 3m

720199-B21

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Description

This is a passive 3 m copper direct attach cable from the HPE BladeSystem c-Class 40Gb QSFP+ range, with a QSFP+ connector at each end. It links 40GbE QSFP+ ports on HPE servers, switches and interconnect modules without separate transceivers, which suits short-reach links in the data centre such as connecting BladeSystem or Synergy interconnect modules to top-of-rack switches, or running server-to-switch and inter-switch links within a rack or to adjacent racks.

The cable is 3 m (9.84 ft) long and passive, so it needs no external power and draws 0.042 W maximum per transceiver end. It is rated for operation from 0 to 70 C, with 100 ohm characteristic impedance, a bit error rate of 10^-15 maximum and a time delay of 1.35 nsec/ft. The 3 m length sits between the 1 m and 5 m options in the same cable family, so it suits links that need a little more reach than a short in-rack run.

It is validated for use with HPE servers, switches and interconnect modules that have 40Gb QSFP+ ports, and is also listed as a related option for the HPE Synergy 40Gb F8 Switch Module.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Passive copper design that removes the need for separate transceivers
- Low latency and reduced power usage
- Validated for use with HPE servers, switches and interconnects
- Connects a 40Gb QSFP+ port directly to another QSFP+ port
- Suited to short-distance connections within a rack or to adjacent racks

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Type: 40GbE QSFP+ to QSFP+ passive direct attach copper cable
- Length: 3 m (9.84 ft)
- Connectors: QSFP+ to QSFP+
- Power consumption: 0.042 W maximum per transceiver end
- Cable characteristic impedance: 100 ohms
- Crosstalk between pairs: 26 dB max
- Time delay: 1.35 nsec/ft
- BER: 10^-15 max
- Cable diameter: 0.255 in
- Minimum cable bend radius: 1.78 in
- Weight: 0.57 lb, fully loaded with a QSFP+ transceiver at each end
- Operating temperature: 0 to 70 C (32 to 158 F)
- Operating relative humidity: 5% to 95%, noncondensing
- Storage temperature: -20 to 80 C (-4 to 176 F)
- Storage relative humidity: 5% to 95%, noncondensing
- Altitude: up to 3 km (10,000 ft)

FAQs

Q: Does this cable need a separate transceiver?
A: No. It is a passive direct attach copper cable with QSFP+ connectors built into each end, so no separate transceivers are needed.

Q: Does it need external power?
A: No. It is a passive cable and draws 0.042 W maximum per transceiver end from the port.

Q: Which HPE equipment is it validated for?
A: It is validated for HPE servers, switches and interconnect modules with 40Gb QSFP+ ports, and is listed as a related option for the HPE Synergy 40Gb F8 Switch Module.

Q: What other lengths are in this cable family?
A: The same family includes 0.35 m (730907-B21), 1 m (720196-B21) and 5 m (720202-B21) QSFP+ to QSFP+ cables, alongside this 3 m (720199-B21) version.

Q: What is a typical use for the 3 m length?
A: It suits short-reach 40GbE links, such as connecting BladeSystem or Synergy interconnect modules to top-of-rack switches, or linking servers and switches within a rack or between adjacent racks.

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