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Black QSFP+ direct-attach twinax cable with latching plugs on both ends, 3 m length

STARTECH

STARTECH QSFP40GPC3M network ethernet cable 40 GbE 3 m 9.84 ft QSFP+ direct attach twinax 30 AWG 100 ohm

SKU CH-FDYK-572M8 MPN QSFP40GPC3M

A 3 m QSFP+ direct-attach twinax cable providing 40 GbE connectivity with 30 AWG, 100-ohm impedance and MSA compliance

  • Cable categoryQSFP+
  • First connector1 x QSFP+ Latching Plug
  • Second connector1 x QSFP+ Latching Plug
  • Product typeQSFP+ Direct Attach Cable
  • Overall length9.84 ft (3 m)
  • Product colorBlack
  • 40 GbE copper link without fiber cost
  • 3 m passive twinax draws under .1 W
  • MSA and SFF-8436 compliant for multi-vendor use
  • Hot-swappable QSFP+ ends install without downtime
  • 30 AWG 100-ohm construction keeps signal integrity

3 m QSFP+ Direct-Attach Twinax Cable

This 3 metre QSFP+ direct-attach twinax cable provides a 40 GbE copper link between compatible switches, routers or network adapters. It uses 30 AWG conductors with 100 ohm impedance and meets MSA industry standards. The passive design consumes less than 0.1 W and is hot-swappable with fibre-optic modules.

Suitable for short-reach 40 GbE links.

The 3 m length suits rack-to-rack or adjacent-rack connections in data centres and enterprise closets. Buyers who need longer reaches should consider active optical cables or fibre transceivers instead. The cable terminates in latching QSFP+ plugs on both ends for secure insertion.

MSA-compliant QSFP+ copper with 30 AWG construction

The cable complies with SFF-8436 connector specifications and multi-source agreement standards, ensuring interoperability with MSA-compliant ports. Its 30 AWG twinax construction delivers a cost-effective alternative to fibre for 40 GbE deployments. No configuration is required beyond inserting the connectors.

How it compares

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Price $24.99
Pricier than about 70% of the 9,945 comparable items (median $14.99).

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Specifications

Product
Brand nameStarTech.com
Model nameQSFP40GPC3M
Product typeQSFP+ Direct Attach Cable
Product colorBlack
Connectivity
Cable categoryQSFP+
Ports & slots
First connector1 x QSFP+ Latching Plug
Second connector1 x QSFP+ Latching Plug
Size & build
Overall length9.84 ft (3 m)
Shipping weight0.27 kg
Package size268 × 239 × 36 mm

Questions about this item

Will this 3 m QSFP+ DAC work in a switch port that currently uses 40 GbE fiber modules?

Yes, the cable is hot-swappable with fiber-optic modules and uses the same QSFP+ latching plug, so it can replace a fiber module in an active 40 GbE port without a reboot.

How can I confirm the link is running at 40 GbE after I plug the cable in?

Check the switch or NIC dashboard for a 40 GbE link status and verify the reported cable length reads 3 m or 9.84 ft, which matches the passive twinax assembly.

Does the box include any transceivers or breakout adapters, or is it just the cable?

The package contains only the 3 m QSFP+ direct-attach twinax cable with latching plugs on both ends; no separate transceivers or breakout adapters are included.

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