QSFP-100G-CU5M – 100G QSFP DAC – 5m Length – Passive Copper Cable

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QSFP-100G-CU5M Description

The QSFP-100G-CU5M is a Cisco 100GBASE-CR4 QSFP passive copper cable for 100G links that span adjacent racks. At 5 meters it is the longest passive copper length in the QSFP-100G family, with 1.5W per end, a 9 mm cable diameter, a 70 mm bend radius and a gray pull tab. The cable is passive copper rated for 0 to 70°C, so runs beyond 5 meters need optical media.

Quick Specs

Parameter

Specification

Product ID

QSFP-100G-CU5M

Product type

100GBASE-CR4 QSFP passive copper cable

Cisco ordering description

Cisco 100GBASE-CR4 QSFP Passive Copper Cable, 5-meter

Cable assembly type

Direct-attach copper cable assembly

Interface role

QSFP-to-QSFP 100G direct-attach cable

Data rate

100 Gigabit Ethernet

Cable length

5 meters

Power consumption

1.5W per end

Pull tab color

Gray

Cable diameter

9 mm

Bend radius

70 mm

Application Scenarios

Row-End To Adjacent Rack Links

A switch at the end of one rack can reach a 100G port in the next rack over a 5-meter passive copper run, which keeps the link copper-only and free of optical modules.

Core To Storage Array Connections

In a storage row, the cable ties a 100G QSFP port on a switch to a nearby array controller, with enough length to route around the rack frame and its 70 mm bend radius.

Product Comparison

Parameter

QSFP-100G-CU5M

QSFP-100G-CU2M

QSFP-100G-CU3M

QSFP-100G-AOC5M

Cable type

Passive copper (100GBASE-CR4)

Passive copper (100GBASE-CR4)

Passive copper (100GBASE-CR4)

Active optical cable

Cable length

5 meters

2 meters

3 meters

5 meters

Power consumption

1.5W per end

1.5W per end

1.5W per end

3.5W per end

Pull tab color

Gray

Brown

Orange

Gray

Cable diameter

9 mm

7 mm

7 mm

3.5 mm

Bend radius

70 mm

50 mm

50 mm

30 mm

QSFP-100G-CU5M and QSFP-100G-CU3M are both 100GBASE-CR4 passive copper cables at 1.5W per end, but QSFP-100G-CU5M is 5 m long with a 9 mm diameter and 70 mm bend radius, against 3 m, 7 mm and 50 mm for QSFP-100G-CU3M. A run of 3 m or less takes QSFP-100G-CU3M, or QSFP-100G-CU2M at 2 m, with the thinner cable. At the same 5 m, QSFP-100G-AOC5M is an active optical cable with a 3.5 mm diameter and 30 mm bend radius, which routes through dense cable managers more easily but draws 3.5W per end instead of 1.5W. Passive copper ends at 5 m in this family, so a longer run needs an active optical cable.

Ordering Checklist

  • Host support: Confirm the target Cisco switch or router and its QSFP28 port are listed for QSFP-100G-CU5M in the Cisco 100 Gigabit Ethernet Transceiver Modules Compatibility Matrix. A cable that fits the cage can still be unsupported on a given host.

Specifications

Parameter Specification Parameter Specification
Product ID QSFP-100G-CU5M Product type 100GBASE-CR4 QSFP passive copper cable
Cisco ordering description Cisco 100GBASE-CR4 QSFP Passive Copper Cable, 5-meter Cable assembly type Direct-attach copper cable assembly
Interface role QSFP-to-QSFP 100G direct-attach cable Data rate 100 Gigabit Ethernet
Cable length 5 meters Power consumption 1.5W per end
Pull tab color Gray Cable diameter 9 mm
Bend radius 70 mm QSFP connector module dimensions 13.5 x 18.4 x 72.4 mm maximum outer dimensions
QSFP connector module weight 100 grams or less Operating temperature 0 to 70°C
Storage temperature -40 to +85°C Standards references SFF-8665, SFF-8636, IEEE 802.3-2022, IEEE 802.3ba, IEEE 802.3bm
Compliance reference RoHS 6 Copper cable jacket safety UL E116441 compliant
Copper cable electrical safety ELV compliant

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    Connor Yamamoto
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    Asked about a return window. They were flexible and fair.

    Mary Flores
    Posted on 25/01/2026
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    5.0

    Product is performing as expected. No problems.

    Sophia Rivera
    Posted on 24/01/2026
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    5.0

    Our hardware authentication procedure had zero findings on this unit.

Questions & Answers

  • Which safety approvals does QSFP-100G-CU5M carry?

    The copper jacket of QSFP-100G-CU5M is UL E116441 compliant, and the cable assembly is ELV compliant for electrical safety. It also carries an RoHS 6 compliance reference for the passive copper assembly and its connector bodies.
  • Which standards does QSFP-100G-CU5M reference?

    QSFP-100G-CU5M references SFF-8665, SFF-8636, IEEE 802.3-2022, IEEE 802.3ba and IEEE 802.3bm for its 100GBASE-CR4 link. These references apply to the direct-attach copper assembly, which has fixed QSFP connectors at both ends and no separate optical modules.
  • What storage temperature applies to QSFP-100G-CU5M?

    QSFP-100G-CU5M can be stored from -40 to +85°C, while operation is limited to 0 to 70°C. Each QSFP connector measures up to 13.5 x 18.4 x 72.4 mm, which sets the clearance needed beside adjacent ports.
  • What bend radius does QSFP-100G-CU5M need?

    QSFP-100G-CU5M needs a minimum bend radius of 70 mm and has a 9 mm cable diameter. Route the 5 meter passive copper cable through a cable manager that keeps to that radius, since tighter bends can damage the copper pairs.

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DataSheet Downloads

  • QSFP-100G-CU5M Datasheet