Cisco QSFP-100G-CU3M 100GBASE-CR4 Passive Copper Cable (3 Meter)

The genuine Cisco 3-meter DAC for 100G QSFP28 ports — enough reach for adjacent racks without paying for optics. The QSFP-100G-CU3M is a passive twinax direct-attach cable that builds a 100GBASE-CR4 link between QSFP28 ports with no transceivers, no fiber, and essentially no power draw or latency.

These are real Cisco cables, the same assemblies Cisco ships for Nexus 9000 and Catalyst 9500 builds — not a coded compatible. Twinax is factory-terminated at both QSFP28 ends, so installation is two clicks and done.

Key Specifications

• Part Number: Cisco QSFP-100G-CU3M
• Cable Type: 100GBASE-CR4 passive direct-attach copper (twinax), 30 AWG
• Connectors: QSFP28 to QSFP28
• Length: 3 meters (9.8 ft)
• Data Rate: 100 Gbps (4 x 25G NRZ lanes)
• Condition: Refurbished — tested and verified

Only need an in-rack run? The 1-meter QSFP-100G-CU1M is listed separately.

Why Buy From Reef Telecom?

• Genuine Cisco — label and hologram verified on every unit
• Professionally tested and inspected
• 10-year warranty on every unit
• Free shipping on orders over $300

Condition

Certified Refurbished

Warranty

10-Year Reef Telecom Warranty

Manufacturer Part Number

QSFP-100G-CU3M

Reef SKU

QSFP-100G-CU3M-R

UPC

882658836589

Brand

Cisco

Free ground shipping on orders over $300 (contiguous US). Same-day shipping on orders placed before 4 PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.