400G PAM4 QSFP-DD to 2×200G QSFP56 Direct Attach Copper Cable (DAC), PVC, Passive, up to 3 m (10 ft)

Overview

The NSComm 400G PAM4 QSFP-DD to 2×200G QSFP56 Direct Attach Copper Cable (DAC) is a breakout copper interconnect designed for 400G-to-2×200G Ethernet connectivity in large-scale data centers, cloud infrastructures, and HPC environments.

Built with twinax copper cable and a PVC jacket, it offers 400 Gbps aggregate bandwidth split into two 200G channels via 8×50 Gbps PAM4 lanes. The passive version supports lengths up to 3 m (10 ft) with virtually zero power consumption, making it an ideal choice for short-range, in-rack deployments.

For extended reach, active DACs support up to 5 m (16 ft) while consuming ≤ 4 W per end. Its low latency, robust EMI immunity, and cost advantage over optical solutions make it perfect for high-density interconnect applications.

Compatible Brands

The NSComm 400G QSFP-DD to 2×200G QSFP56 DAC is validated to work seamlessly with switches and servers from Juniper, Arista and Dell.

Need assistance verifying compatibility with your equipment? [Contact Us Now] for direct support.

Key Specifications

Specification	Details
Vendor Name	NSComm
Product Type	400G PAM4 QSFP-DD to 2×200G QSFP56 Direct Attach Copper Cable (DAC)
Data Rate	400 Gbps total, breakout into 2×200 Gbps channels (PAM4)
Cable Type	Twinax Copper, PVC Jacket, Passive/Active
Max Cable Distance	Passive: up to 3 m (10 ft); Active: up to 5 m (16 ft)
Conductor AWG Options	30 AWG (≤ 2 m), 26 AWG (≤ 3 m), 24 AWG (active ≤ 5 m)
Connector Type	1× QSFP-DD to 2× QSFP56
Power Consumption	Passive ≈ 0 W, Active ≤ 4 W
Temperature Range	0 °C to 70 °C
Standards Compliance	QSFP-DD MSA (SFF-8679), QSFP56 MSA (SFF-8665), IEEE 802.3cd/802.3bs, RoHS
Applications	400G-to-200G breakout, aggregation, server-to-switch interconnects

Why Choose NSComm 400G QSFP-DD to 2×200G DAC?

Breakout performance: Splits one 400G port into two 200G channels.
Cost-efficient: Cheaper than optical breakout modules and AOCs.
Ultra-low latency: Direct copper design with no optical conversion.
Energy savings: Passive requires no power; active ≤ 4 W.
Broad interoperability: Validated with all leading switch and server vendors.

Length Options

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

Extended (active) lengths:
5 m (16 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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