40G QSFP+ to 4×10G SFP+ Direct Attach Copper Cable (DAC), Passive, up to 7 m (23 ft)

Overview

The NSComm 40G QSFP+ to 4×10G SFP+ Direct Attach Copper Cable (DAC) is a breakout copper interconnect designed for short-reach 40 Gigabit Ethernet to 4×10 Gigabit Ethernet connections.

With one QSFP+ connector on one end and four SFP+ connectors on the other, it enables seamless 40G-to-10G port breakout for top-of-rack (ToR) or middle-of-row (MoR) deployments.

Constructed with twinax copper cable, this DAC provides ultra-low latency and a cost-effective alternative to optical transceivers. The passive version supports lengths up to 7 m (23 ft), consuming virtually no power. Active versions extend reach to up to 10 m (33 ft) while keeping power consumption below 1.5 W.

Compatible Brands

The NSComm 40G QSFP+ to 4×10G SFP+ DAC is compatible with switches and servers from Cisco, Huawei, Juniper, Arista, Dell, Intel, and Extreme.

Need help confirming compatibility with your exact model? [Contact Us Now] for direct assistance.

Key Specifications

Specification	Details
Vendor Name	NSComm
Product Type	40G QSFP+ to 4×10G SFP+ Direct Attach Copper Cable (DAC)
Data Rate	40 Gbps (4×10 Gbps breakout)
Cable Type	Twinax Copper, Passive/Active
Max Cable Distance	Passive: up to 7 m (23 ft); Active: up to 10 m (33 ft)
Conductor AWG Options	30 AWG (≤ 3 m), 26 AWG (≤ 5 m), 24 AWG (≤ 7–10 m)
Connector Type	1× QSFP+ to 4× SFP+
Power Consumption	Passive ≈ 0 W, Active ≤ 1.5 W
Temperature Range	0 °C to 70 °C
Standards Compliance	QSFP+ MSA (SFF-8436), SFP+ MSA (SFF-8431/8432), IEEE 802.3ba, RoHS
Applications	40G-to-10G breakout links, server-to-switch uplinks, aggregation nodes

Why Choose NSComm 40G Breakout DAC?

Breakout efficiency: Maps one 40G port into four 10G channels.
Ultra-low latency: Direct copper design, no optical conversion.
Cost-effective: Cheaper than optical breakout modules + patch cords.
Flexible length options: Passive up to 7 m (23 ft); active up to 10 m (33 ft).
Wide compatibility: Tested across all major switch and server platforms.

Length Options

Standard stocked lengths:
1 m (3 ft), 2 m (7 ft), 3 m (10 ft), 5 m (16 ft), 7 m (23 ft)

Extended (active) lengths:
10 m (33 ft)

More Details

Quality Certifications

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Warranty

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Item conditions are "New Sealed". They are fully tested by Certified CCIE / HCIE / RCNP Engineers.

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Standard Warranty Policy

Original New Sealed Enterprise Hardware: 3 Years
Original New Sealed Consumer Devices: 1 Year

The Support Contacts

If your NSComm products failed, you must contact your sales representative to verify product failure. If the problem still can't correct by remote support methods i.e. email or phone support, the RMA procedure will issue.

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