Cisco QSFP-100G-CU5M Compatible 100G QSFP28 4 x 25G NRZ Passive Copper Twinax Cable, 5m (16ft)

Designed for hosts that recognize QSFP-100G-CU5M, this QSFP28 to QSFP28 cable delivers 100G transmission over a fixed 5m (16ft) assembly. Its DAC construction provides a factory-terminated passive copper link without separate optical modules or patch cords.

OEM Part Number: QSFP-100G-CU5MHT Part Number: QSFP-100G-CU5M

Product Highlights

• Compatible alternative to Cisco QSFP-100G-CU5M
• 100G connectivity at 100Gbps
• Interface configuration: QSFP28 to QSFP28
• Fixed length and part number: 5m (16ft), QSFP-100G-CU5M
• Cable construction: Passive Twinax
• Conductor specification: 26AWG
• Maximum power consumption: ≤0.5W
• Minimum bend radius: 45mm

Cisco classifies the QSFP-100G-CUxM family as 100GBASE-CR4 passive copper direct-attach cable for very short links within racks and between adjacent racks. Its documented family includes 1m, 1.5m, 2m, 2.5m, 3m and 5m part numbers. This HT page covers the exact length and OEM reference shown above; the compatible assembly itself follows the HT specification table.

A passive DAC has no separate optical conversion stage. Its low-power, low-latency operation is useful for short equipment links, but the assembly must remain within the length and signaling mode accepted by both hosts.

The 5m (16ft) length gives QSFP-100G-CU5M more freedom for adjacent-rack and row-end deployments. Longer copper runs need particular attention to routing weight and bend control; the DAC specification and host support must still match the intended link.

QSFP-100G-CU5M is the longest of 7 verified length options in this family. Compared with QSFP-100G-CU3M at 3m (10ft), it provides 2m of additional reach for a longer vertical drop, a wider rack or an adjacent-cabinet route. Confirm that the complete path requires this length, because unused slack still needs supported, bend-safe storage.

The listed modulation format is 4x 25G-NRZ to 4x 25G-NRZ. Both host interfaces must be configured for the same aggregate rate and lane arrangement. A connector that fits mechanically does not by itself guarantee that the remote port supports this encoding or breakout mode.

The rated power consumption is ≤0.5W. Include this load in the host-port power and thermal budget, especially in densely populated switches. Maintain front-panel clearance and do not bundle the cable so tightly that it obstructs airflow around the connectors.

This assembly uses 26AWG conductors, PVC (OFNR) jacket, minimum bend radius 45mm. These mechanical characteristics affect how the cable should be dressed behind the equipment. Avoid sharp edges, excessive ties and repeated tight bends close to the connector boots.

The intended application is 100G Ethernet. Listed interface and protocol references include QSFP28 MSA, SFF-8662, IEEE 802.3. Confirm that the host firmware and port configuration support the same operating mode.

Compatibility is more than matching the QSFP28 to QSFP28 shape. This assembly is prepared for hosts expecting QSFP-100G-CU5M and is checked for identification, stable link behavior and electrical continuity, link stability and diagnostic readouts. We recommend confirming the equipment model and software release for critical deployments or mixed-vendor installations.

Use part number QSFP-100G-CU5M for the 5m (16ft) assembly. For mixed-length projects, list each required part number and quantity separately so that every cable can be tested and packed according to its intended installation.

Before packing, our team checks the cable jacket, connector boots, latches and identification of each assembly. The cable is then secured in a loose coil and protected against dust and connector impact. Neutral packaging, customer part-number labels and project-specific carton lists can be supplied on request.

Available stock is usually packed and handed to the carrier within one to three working days. Delivery can be arranged by international express, air cargo or sea freight, with tracking details supplied after dispatch. Freight-collect shipments and delivery to a customer warehouse or forwarder can also be coordinated.