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HCH is a manufacturer of 40g dac fiber patch cables.
HCH is a manufacturer of 40g dac fiber patch cables.
HCH is a manufacturer of 40g dac fiber patch cables.
HCH is a manufacturer of 40g dac fiber patch cables.
HCH is a manufacturer of 40g dac fiber patch cables.

Cisco Compatible 40G QSFP+ DAC Cable – Passive Direct Attach Copper

QSFP-40G-DAC
The QSFP-40G-DAC is a 40G QSFP+ DAC cable designed for reliable short-distance connections between switches, servers and network adapters. Available in multiple cable lengths, it provides a low-power and cost-effective solution for intra-rack and adjacent-rack connectivity in data centers and enterprise networks.

Product Highlights
*40Gbps QSFP+ to QSFP+ passive copper connection
*Multiple cable lengths available
*Low power consumption of up to 0.5W
*Hot-pluggable and compliant with QSFP+ MSA
*Tested for compatibility and stable signal transmission
*Suitable for switches, servers, and network adapters
*Designed for short-distance data center connections
*RoHS compliant
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Cisco Compatible 40G QSFP+ DAC Cable Specifications

The Cisco compatible 40G DAC cable provides a reliable QSFP+ to QSFP+ copper connection for 40 Gigabit Ethernet applications. This passive twinax cable is compliant with IEEE 802.3ba and QSFP+ MSA standards and requires no optical signal conversion.

Designed for short-distance connections within a rack or between adjacent racks, the 40G passive DAC cable offers low power consumption, low latency and stable signal transmission for switches, servers and network adapters.

Specifications

Model numberQSFP-40G-DACBrandFirstoptic
Connector TypeQSFP+ to QSFP+Max Data Rate40Gbps
Cable TypePassive Twinax Copper CableAvailable Lengths1m, 2m, 3m, 4m and 5m
ApplicationIntra-rack and Adjacent-rack ConnectionsJacket MaterialPVC (OFNR)
Temperature0 to 70°C (32 to 158°F)Protocols40G Ethernet / 40GBASE-CR4
 

Why Choose a 40G Passive DAC Cable?

Lower Connection Cost
One integrated cable replaces two optical transceivers and a separate fiber cable.

Low Power and Low Latency
Passive copper transmission requires no optical signal conversion.

Simple Installation
The integrated QSFP+ design simplifies deployment and cable management.

40g qsfp+ dac cable compared with optical transceivers and fiber cable
 
 

Applications

The 40G QSFP+ DAC cable provides reliable short-distance connections between devices equipped with compatible QSFP+ ports. It is ideal for intra-rack and adjacent-rack links in data centers and enterprise networks.
 
1. Switch-to-Server Connectivity
Connects a 40G switch to a server network adapter for high-bandwidth intra-rack communication.
 
2. Switch-to-Switch Connectivity
Provides a direct 40G link between switches within the same rack or between adjacent racks.

3. Switch-to-Storage Connectivity
Connects a 40G switch to a storage system equipped with compatible QSFP+ ports.

40g qsfp+ dac cable applications for switch server and storage connections

 

Quality Assurance

Each 40G passive DAC cable is tested before shipment to verify correct coding, stable link performance and reliable 40Gbps transmission.

HCH is a manufacturer of 40g dac fiber patch cables.

Compatible with Major Network Platforms

The 40G QSFP+ DAC cable is available with compatibility options for major network platforms.
Please provide the device model and software version when ordering to confirm compatibility.
 
40g qsfp+ dac cable compatibility with Cisco Arista NVIDIA and other network platforms
FAQ Section

What is a 40G QSFP+ DAC cable used for?

A 40G QSFP+ DAC cable is used for short-distance connections between compatible switches, servers, network adapters and storage systems equipped with 40G QSFP+ ports.

What lengths are available for the 40G passive DAC cable?

Available lengths depend on the selected product configuration. Passive DAC cables are designed for short-distance intra-rack and adjacent-rack connections.

Does the cable require separate optical transceivers?

No. The QSFP+ connectors and twinax copper cable form one integrated assembly, so separate optical transceivers and fiber cables are not required.

Is the cable compatible with Cisco equipment?

The Cisco compatible 40G DAC cable can be programmed for supported Cisco switches and network devices. Compatibility should be confirmed according to the exact equipment model and software version.

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