40G QSFP+ to CX4 DDR Direct Attach Copper Cable 30AWG Passive 5M

The 40G QSFP+ to CX4 DDR Direct Attach Copper Cable is a 5-meter, 30AWG passive solution for high-speed, short-reach interconnects. It provides plug-and-play, low-latency 40G connectivity with compact and organized installation, and OEM/ODM customization is available.

SKU DAC-QSFP-CX4-P05 Category
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The 40G QSFP+ to CX4 DDR Direct Attach Copper (DAC) Cable is designed for high-speed, short-reach interconnects in data centers, enterprise networks, and telecom environments. With a 5-meter length and 30AWG copper construction, this passive DAC cable provides reliable connectivity between a 40G QSFP+ port and a CX4 DDR interface, enabling efficient high-bandwidth data transmission.

This cable is a passive plug-and-play solution, requiring no external power or configuration. Its design ensures low latency, energy-efficient operation, and stable performance for server, switch, and storage interconnections. The compact and flexible construction reduces cable bulk, improves airflow, and simplifies rack organization.

Ideal for short-reach backbone links and high-density networking applications, this cable delivers reliable 40G performance while minimizing insertion loss. FiberMania also provides OEM/ODM customization options, including custom lengths, labeling, and packaging for specific project requirements.

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Cable TypeCopper
Active / PassivePassive
Connector TypeQSFP+ to CX4
Cable Gauge30 AWG
Cable Length5 m
Fiber Type / ModeN/A
Jacket Type / ColorN/A
Features / NotesDDR DAC | short-range high-speed
  • 40G QSFP+ to CX4 DDR passive DAC cable

  • 30AWG copper construction for reliable high-speed transmission

  • 5-meter length suitable for short-reach interconnects

  • Plug-and-play, no external power required

  • Low-latency and energy-efficient performance

  • Compact design for improved airflow and organized cabling

  • OEM/ODM customizable for lengths, labeling, and packaging

  • High-speed data center switch-to-server connections

  • Enterprise network backbone links

  • Storage area networks (SANs) and server clusters

  • Short-reach high-bandwidth interconnects

  • Telecommunications and enterprise networking environments

FiberMania offers OEM and ODM services for DAC cables, including custom cable lengths, labeling, packaging, and branding to meet project-specific or deployment requirements.

Customize DAC & AOC High-Speed Cable Solution

Cable Type Passive DAC / Active DAC (ACC) / Active Optical Cable (AOC)
Form Factor SFP+ / SFP28 / QSFP+ / QSFP28 / QSFP56 / QSFP-DD / OSFP
Data Rate 10G / 25G / 40G / 50G / 100G / 200G / 400G / 800G
Cable Length 0.5m–15m (DAC) / 1m–100m (AOC)
Transmission Medium Twinax Copper / Multimode Optical Fiber
Connector Compatibility Cisco / NVIDIA / Arista / Juniper / Dell / HPE / Generic Compatible
Jacket Type PVC / LSZH
EEPROM Coding OEM Compatible Programming Available
Operating Temperature Commercial / Industrial Grade

Q1: What is the supported data rate of this cable?
A: It supports 40G transmission between QSFP+ and CX4 DDR interfaces.

Q2: Does this cable require external power?
A: No, as a passive DAC cable, it is plug-and-play and does not require power.

Q3: What is the cable length?
A: This model comes in a 5-meter length. Custom lengths are available via OEM/ODM services.

Q4: What is 30AWG?
A: 30AWG refers to the wire gauge, indicating a thin and flexible copper conductor suitable for short-reach high-speed links.

Q5: Can this cable be used for long-distance connections?
A: No, passive DAC cables are intended for short-reach applications; longer distances may require active DAC or optical transceivers.

Q6: Is customization available?
A: Yes, FiberMania supports OEM/ODM customization including cable length, labeling, packaging, and branding.