StarTech.com Cisco QSFP-H40G-CU3M 3m 40GBase Direct Attach Cable Transceiver

Network upgrades often stall because you need a fast, reliable link that won’t break the budget. The StarTech.com Cisco QSFP-H40G-CU3M 3m 40GBase Direct Attach Cable Transceiver is a passive twin-ax copper cable that connects QSFP+ ports at 40 Gbps, perfect for in-rack server or switch connections where low latency and power use matter.

Key Features of a 3m Direct Attach Cable

• Cable / Technology: Twinaxial. Provides a compact, high-speed link without the bulk of fibre.
• Cable / Right Connector Type: QSFP+. Fits standard QSFP+ ports on Cisco-compatible gear.
• Cable / Left Connector Type: QSFP+. Ensures a symmetrical connection at both ends.
• Network Cable Type: 40GBase direct attach cable. Delivers 40 Gbps Ethernet performance.
• Cable Length: 3 m. Ideal for short-run, rack-to-rack applications.
• Colour: Black. Blends discreetly with most data-centre environments.
• Compliant Standards: FCC, RoHS, MSA. Meets industry safety and interoperability rules.
• AWG: 30. Thin conductors reduce weight while maintaining signal integrity.
• Jacket Material: PVC. Offers durability and resistance to wear.
• Features: Passive cable. No active electronics needed, keeping cost and power low.

Why Choose a StarTech.com Direct Attach Cable

If you manage a data centre or high-performance compute cluster, you know that every millisecond counts and cable clutter can become a nightmare. Traditional fibre solutions are expensive and require transceivers at each end, adding complexity and power draw. You need a simple, hot-swappable link that delivers full 40 Gbps without extra optics. This cable fits perfectly into that niche, giving you a clean, low-latency connection that’s easy to install and replace, minimising downtime.

Benefits of StarTech.com Direct Attach Cable

• Easy installation: Hot-swappable design lets you plug in or replace the cable without powering down equipment.
• Cost-effective: Passive twin-ax eliminates the need for costly active transceivers.
• Low power: Consumes less energy than fibre-optic alternatives, reducing operating costs.
• Reliable performance: Built to Cisco-compatible specifications, ensuring stable 40 Gbps throughput.
• Lifetime support: Backed by a lifetime warranty and multilingual technical assistance.

Usages of a 3m Direct Attach Cable

This 3 m direct attach cable is ideal for connecting servers to top-of-rack switches, linking adjacent switches in a spine-leaf architecture, or creating point-to-point links within a rack where space is limited and high bandwidth is essential. It works seamlessly with Cisco-compatible devices, making it a versatile choice for modern data-centre layouts.

Specifications