1.6T DAC

1.6T/800G DAC Copper Cable Series is a high-speed direct attach copper cable solution designed for next-generation data centers, AI/GPU clusters, HPC, and storage networks. It supports InfiniBand XDR at 1600G and 800G, providing low-latency, low-power, and cost-effective short-reach connectivity.
The series includes QSFP-DD, OSFP, and QSFP224 form factors, with both straight and breakout configurations: 1.6T to 1.6T, 1.6T to 2x800G, and 800G to 800G. Available designs include Flat to Flat, Flat to Flat (RHS), and Finned to Finned (IHS), supporting different chassis, cooling, and port layouts.
All models are 1M length, 26AWG copper cable assemblies, available in Commercial and Industrial temperature options.

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1.6T DAC Direct Attach Copper Cable for High-Speed AI and HPC Interconnects

Form Factor	Part No.	Fiber Type	Data Rate	Cable	Distance	Wire Gauge	Temperature	Note
1.6T QSFP-DD to 1.6T QSFP-DD Flat to Flat	CLQD16-QD16CU-1	Copper	1600G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
1.6T QSFP-DD to 2x800G QSFP-DD Flat to Flat	CLQD16-2xQD8CU-1	Copper	1600G / 800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
800G QSFP-DD to 800G QSFP-DD Flat to Flat	CLQD8-QD8CU-1-XD	Copper	800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
1.6T OSFP to 1.6T OSFP Flat to Flat (RHS)	CLOP16-OP16CU-1-R	Copper	1600G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
1.6T OSFP to 2x800G OSFP Flat to Flat (RHS)	CLOP16-2xOP8CU-1-R	Copper	1600G / 800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
800G OSFP to 800G OSFP Flat to Flat (RHS)	CLOP8-OP8CU-1-XD-R	Copper	800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
1.6T OSFP to 1.6T OSFP Finned to Finned (IHS)	CLOP16-OP16CU-1-I	Copper	1600G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
1.6T OSFP to 2x800G OSFP Finned to Finned (IHS)	CLOP16-2xOP8CU-1-I	Copper	1600G / 800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
800G OSFP to 800G OSFP Finned to Finned (IHS)	CLOP8-OP8CU-1-XD-I	Copper	800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet
800G QSFP224 to 800G QSFP224 Flat to Flat	CLQ224-Q224-1-XD	Copper	800G IB XDR	Cable	1M	26 AWG	Com./Ind.	Datasheet

The C-LIGHT 1.6T DAC Direct Attach Copper Cable is a high-speed passive copper interconnect solution designed for next-generation data centers, AI/GPU clusters, high-performance computing (HPC), and storage networks. Supporting InfiniBand XDR at 1600G and 800G, the product family provides low-latency, low-power, and cost-effective short-reach connectivity between compatible high-speed ports. Available configurations include QSFP-DD, OSFP, and QSFP224 interfaces, with straight-through and breakout designs for different port layouts. All listed assemblies feature a 1-meter cable length, 26 AWG copper conductors, and commercial or industrial temperature options.

Key Features

1600G and 800G InfiniBand XDR

The product family supports 1600G and 800G InfiniBand XDR connectivity for high-bandwidth interconnections in AI computing, HPC, and next-generation data center networks.

Low-Latency Copper Connectivity

The direct attach copper architecture provides a short-reach interconnect solution with low latency and low power consumption, without requiring separate optical transceivers.

QSFP-DD, OSFP, and QSFP224 Options

Multiple connector form factors support different host platforms, port configurations, and system integration requirements.

Straight-Through and Breakout Designs

Available configurations include 1.6T-to-1.6T, 1.6T-to-2x800G, and 800G-to-800G connections for flexible high-speed port interconnection.

Flat-to-Flat and Finned Designs

Flat-to-Flat, Flat-to-Flat (RHS), and Finned-to-Finned (IHS) configurations provide different mechanical profiles for chassis, cooling, and port-layout requirements.

1-Meter, 26 AWG Copper Cable

All listed models use a 1-meter, 26 AWG copper cable assembly for compact, short-reach connections inside high-density computing and networking systems.

Product Specifications

Product Type

Direct Attach Copper (DAC) Cable

Supported Data Rates

1600G and 800G InfiniBand XDR, depending on model

Connector Form Factors

QSFP-DD, OSFP, and QSFP224

Cable Type

Copper cable assembly

Cable Length

1 meter for all listed models

Wire Gauge

26 AWG

Connection Configurations

1.6T-to-1.6T, 1.6T-to-2x800G, and 800G-to-800G

Mechanical Designs

Flat-to-Flat, Flat-to-Flat (RHS), and Finned-to-Finned (IHS)

Temperature Options

Commercial and industrial options

Product Testing

100% product testing

Warranty

3-year warranty

Technical Support

Product compatibility guidance and technical support

1.6T QSFP-DD DAC Cable Series

CLQD16-QD16CU-1

This 1.6T QSFP-DD-to-QSFP-DD DAC cable provides a straight-through connection between two 1600G InfiniBand XDR ports. It uses a 1-meter, 26 AWG copper assembly in a Flat-to-Flat configuration.

CLQD16-2xQD8CU-1

This 1.6T QSFP-DD-to-2x800G QSFP-DD breakout DAC connects a 1600G interface to two 800G interfaces. It supports flexible high-bandwidth interconnection across compatible host platforms.

CLQD8-QD8CU-1-XD

This 800G QSFP-DD-to-QSFP-DD DAC cable provides a direct connection between two 800G InfiniBand XDR ports using a 1-meter, 26 AWG copper assembly.

1.6T and 800G OSFP DAC Cable Series

CLOP16-OP16CU-1-R

This 1.6T OSFP-to-OSFP DAC cable uses a Flat-to-Flat (RHS) design for connecting two 1600G InfiniBand XDR ports. The 1-meter copper assembly supports high-density short-reach interconnection.

CLOP16-2xOP8CU-1-R

This 1.6T OSFP-to-2x800G OSFP breakout cable uses a Flat-to-Flat (RHS) design to connect one 1600G port to two 800G ports.

CLOP8-OP8CU-1-XD-R

This 800G OSFP-to-OSFP DAC cable uses a Flat-to-Flat (RHS) design for direct 800G InfiniBand XDR connectivity between compatible OSFP interfaces.

CLOP16-OP16CU-1-I

This 1.6T OSFP-to-OSFP DAC cable features a Finned-to-Finned (IHS) mechanical configuration for compatible 1600G InfiniBand XDR platforms.

CLOP16-2xOP8CU-1-I

This 1.6T OSFP-to-2x800G OSFP breakout cable features a Finned-to-Finned (IHS) design for systems requiring one 1600G connection to branch into two 800G connections.

CLOP8-OP8CU-1-XD-I

This 800G OSFP-to-OSFP DAC cable uses a Finned-to-Finned (IHS) design for short-reach 800G InfiniBand XDR connectivity.

800G QSFP224 DAC Cable Series

CLQ224-Q224-1-XD

This 800G QSFP224-to-QSFP224 DAC cable provides a direct connection between compatible 800G InfiniBand XDR ports. Its 1-meter, 26 AWG copper assembly is designed for short-reach connectivity in high-density computing and networking systems.

QSFP224 Interface Integration

The QSFP224 form factor offers an additional connector option within the 800G DAC family for host platforms designed around compatible QSFP224 ports.

Connection and Mechanical Configurations

1.6T-to-1.6T Direct Connection

Straight-through DAC configurations connect two compatible 1600G ports, providing direct copper connectivity between high-speed network interfaces.

1.6T-to-2x800G Breakout

Breakout configurations connect one 1600G interface to two 800G interfaces, supporting system architectures that require different port bandwidth groupings.

800G-to-800G Direct Connection

Dedicated 800G DAC assemblies connect compatible 800G ports across QSFP-DD, OSFP, or QSFP224 interfaces, depending on the selected model.

Flat-to-Flat Design

Flat-to-Flat assemblies provide a consistent mechanical profile for compatible QSFP-DD and OSFP cable connections.

Flat-to-Flat (RHS)

The RHS-design OSFP cable variants provide a specific mechanical profile for host systems designed around this OSFP configuration.

Finned-to-Finned (IHS)

The IHS-design OSFP cable variants use a finned mechanical profile for compatible system and thermal-layout requirements.

Applications

AI and GPU Clusters

Provides short-reach, high-bandwidth copper connections between compatible high-speed ports in AI computing systems and GPU clusters.

High-Performance Computing

The 1600G and 800G connection options support low-latency interconnection within HPC systems requiring high data throughput.

Data Center Networks

Direct attach copper assemblies provide a practical short-reach interconnect option for high-density data center switching and computing equipment.

Storage Networks

The product family supports high-bandwidth copper connectivity for compatible storage systems and associated data center infrastructure.

High-Density Rack Interconnects

The 1-meter cable length is suitable for short connections between equipment installed within the same rack or nearby rack positions, subject to the link design.

Breakout Port Architectures

The 1.6T-to-2x800G variants support compatible systems that require a single high-speed interface to connect with two 800G interfaces.

Why Choose the C-LIGHT 1.6T DAC Cable

The C-LIGHT 1.6T DAC Cable family provides direct copper interconnection options for 1600G and 800G InfiniBand XDR systems. With QSFP-DD, OSFP, and QSFP224 interfaces, straight-through and breakout configurations, multiple OSFP mechanical profiles, and standardized 1-meter, 26 AWG assemblies, the series supports different port layouts and short-reach connection requirements in AI/GPU clusters, HPC systems, data centers, and storage networks.

FAQ

Q1. What data rates does the 1.6T DAC cable series support?

The product family includes 1600G and 800G InfiniBand XDR cable configurations, depending on the selected model.

Q2. Which connector form factors are available?

The listed product range includes QSFP-DD, OSFP, and QSFP224 interfaces.

Q3. What breakout configuration is available?

The series includes 1.6T-to-2x800G breakout assemblies, enabling one compatible 1600G interface to connect to two compatible 800G interfaces.

Q4. What are the cable length and wire gauge?

All listed assemblies use a 1-meter cable length and 26 AWG copper conductors.

Q5. What is the difference between RHS and IHS OSFP cable designs?

The product series provides Flat-to-Flat (RHS) and Finned-to-Finned (IHS) mechanical designs to match different compatible OSFP port and system layouts.

Q6. Are commercial and industrial temperature options available?

Yes. The listed models are available with commercial and industrial temperature options, depending on the selected product configuration.

1.6T DAC Direct Attach Copper Cable

Designed for high-speed AI, HPC, and data center interconnects, the C-LIGHT 1.6T DAC family provides 1600G and 800G InfiniBand XDR connectivity, QSFP-DD/OSFP/QSFP224 options, 1.6T-to-2x800G breakout configurations, and 1-meter, 26 AWG copper assemblies.

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