QSFP-H40G-ACU10M – 40G QSFP+ Active Copper – 10m Length – Direct-Attach Cable

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QSFP-H40G-ACU10M Description

The QSFP-H40G-ACU10M is a Cisco 40GBASE-CR4 QSFP+ active copper direct-attach cable for 40G links between neighboring cabinets in a rack row. The 10-meter cable uses 26 AWG conductors with a 9 mm QSFP-end diameter and a 50 mm bend radius, draws 1.5W at each end and operates from 0 to 70 degrees C. Active electronics are what let a copper assembly reach 10 meters, where passive 40G copper cables stop at 5 meters.

Quick Specs

Parameter

Specification

Product ID

QSFP-H40G-ACU10M

Product type

40GBASE-CR4 QSFP+ direct-attach copper cable

Interface form factor

QSFP+ to QSFP+ direct attach

Data rate

40 Gigabit Ethernet

Cable standard

40GBASE-CR4

Cable length

10 meters

Cable electronics

Active

Pull tab color

Red

Cable AWG

26 AWG

QSFP-end cable diameter

9 mm

QSFP-end bend radius

50 mm

Power consumption, per QSFP end

1.5 W

Operating temperature

0 to 70 C

Application Scenarios

Cabinet-To-Cabinet 40G Copper

Two cabinets in neighboring racks can join their 40G QSFP+ ports with one 10-meter copper assembly, which avoids separate optics and fiber for a link that stays inside the row.

SFP+-Only Hosts Through An Adapter

A platform that offers only SFP+ ports can take the cable through a CVR-4SFP10G-QSFP reverse adapter, which lists the cable as a supported QSFP+ module.

Product Comparison

Parameter

QSFP-H40G-ACU10M

QSFP-H40G-ACU7M

QSFP-H40G-CU5M

Cable standard

40GBASE-CR4

40GBASE-CR4

40GBASE-CR4

Cable length

10 meters

7 meters

5 meters

Cable electronics

Active

Active

Passive

QSFP-end cable diameter

9 mm

9 mm

9 mm

QSFP-end bend radius

50 mm

50 mm

50 mm

Operating temperature

0 to 70°C

0 to 70°C

0 to 70°C

QSFP-H40G-ACU10M is one of two active copper 40GBASE-CR4 cables in this group and the longest copper option, since QSFP-H40G-ACU7M stops at 7 meters and passive QSFP-H40G-CU5M at 5 meters. Runs of 5 meters or less fit QSFP-H40G-CU5M, and runs of 7 meters or less fit QSFP-H40G-ACU7M, all three with a 9 mm QSFP-end diameter and 50 mm bend radius. Where 10 meters is needed but a thinner cable is wanted for airflow, QSFP-H40G-AOC10M is the optical cable of the same length at 3.5 mm. Runs beyond 10 meters move to QSFP-H40G-AOC15M, because Cisco lists no copper cable longer than 10 meters.

Ordering Checklist

  • Host support: Confirm the 40G QSFP port on the host and the far-end ports for QSFP-H40G-ACU10M appear in Cisco’s Optics-to-Device Compatibility Matrix (tmgmatrix.cisco.com). Platform support is listed in that matrix, not in the cable data sheet.
  • Platforms with SFP+ ports only: Add the CVR-4SFP10G-QSFP reverse adapter, which lists QSFP-H40G-ACU10M as a supported QSFP+ module; CVR-TRAY-8 or CVR-BRKT-1 holds the adapters. A cable with QSFP+ ends has no port to plug into on a platform that offers only SFP+ ports.

Specifications

Parameter Specification Parameter Specification
Product ID QSFP-H40G-ACU10M Product type 40GBASE-CR4 QSFP+ direct-attach copper cable
Interface form factor QSFP+ to QSFP+ direct attach Data rate 40 Gigabit Ethernet
Cable standard 40GBASE-CR4 Cable length 10 meters
Cable electronics Active Pull tab color Red
Cable AWG 26 AWG QSFP-end cable diameter 9 mm
QSFP-end bend radius 50 mm QSFP-end face plate distance 100 mm
Jacket material PVC Jacket color Black
Power consumption, per QSFP end 1.5 W Latency, per link Less than 0.1 microsecond
Operating temperature 0 to 70 C Storage temperature -40 to 85 C
Standards reference IEEE 802.3ba and QSFP MSA SFF-8436 Compatibility reference Cisco 40-Gigabit Ethernet Transceiver Modules Compatibility Matrix

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Questions & Answers

  • How long is QSFP-H40G-ACU10M?

    QSFP-H40G-ACU10M is 10 meters long and uses 26 AWG conductors. The cable is active copper, and the active electronics are what carry the 40GBASE-CR4 link to 10 meters where passive 40G copper cables stop at 5 meters.
  • What operating temperature range does QSFP-H40G-ACU10M support?

    QSFP-H40G-ACU10M operates from 0 to 70 degrees C. Each QSFP end draws 1.5W, so both QSFP+ ports the cable plugs into must stay inside that range, and a site that falls below 0 degrees C is outside the specified window.
  • How long is QSFP-H40G-ACU10M in feet?

    QSFP-H40G-ACU10M measures 32.8 ft. The Nexus 7000 hardware installation guide lists the active copper ACU family in 7 m (23.0 ft) and 10 m (32.8 ft) lengths, so this is the longest copper length in that guide.
  • What latency does a QSFP-H40G-ACU10M link add?

    Latency is less than 0.1 microsecond per link. The figure comes from the specification table for QSFP-H40G-ACU10M and covers the complete copper assembly from one QSFP+ port to the other, so the cable adds well under a microsecond to the path.
  • What storage temperature range applies to QSFP-H40G-ACU10M?

    QSFP-H40G-ACU10M can be stored from -40 to 85 C. The operating range is far narrower, so the cable should be at room conditions before the link is brought up after cold or hot storage.
  • How much face plate distance does QSFP-H40G-ACU10M need?

    QSFP-H40G-ACU10M needs 100 mm of face plate distance at the QSFP end. Keep that depth free in front of the port so the black PVC jacket can leave the connector without exceeding the bend radius.

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DataSheet Downloads

  • QSFP-H40G-ACU10M Datasheet