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.
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Description
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Specification
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Features
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Application
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Custom Service
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FAQ
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.
Featured DAC & AOC Cable Solutions
| SKU | Cable Type | Data Rate | Form Factor A | Form Factor B | Wire Type | Length |
| AOC-100GQSFP28-5 | AOC | 100G | QSFP28 | QSFP28 | OM4 Fiber Cable | 5M |
| AOC-10GSFP-10 | AOC | 10G | SFP+ | SFP+ | OM4 Fiber Cable | 10M |
| AOC-25GSFP28-3 | AOC | 25G | SFP28 | SFP28 | OM4 Fiber Cable | 3M |
| AOC-40GQSFP-10 | AOC | 40G | QSFP+ | QSFP+ | OM3 Fiber Cable | 10M |
| AOC-QSFP-10G4SFP-5 | AOC | 40G | QSFP+ | 4*SFP+ | OM3 Fiber Cable | 5M |
| AOC-QSFP28-4SFP28-3 | AOC | 100G | QSFP28 | 4×SFP28 | OM3 Fiber Cable | 3M |
| DAC-100GQSFP28-25G4SFP28-P5 | DAC | 100G | QSFP28 | 4×SFP28 | 24AWG | 5M |
| DAC-100GQSFP28-P3 | DAC | 100G | QSFP28 | QSFP28 | 26AWG | 3M |
| DAC-10GCX4-P05 | DAC | 10G | CX4 | CX4 | 28AWG | 3M |
| DAC-10GSFP-P10 | DAC | 10G | SFP+ | SFP+ | 24AWG | 10M |
| DAC-10GSFP-XFP-A10 | DAC | 10G | SFP+ | XFP | 24AWG | 10M |
| DAC-400GQSFP-P5 | DAC | 400G | QSFP-DD | QSFP-DD | 30AWG | 5M |
| DAC-40GQSFP-P07 | DAC | 40G | QSFP+ | QSFP+ | 28AWG | 7M |
| DAC-QSFP-10G4SFP-P03 | DAC | 40G | QSFP+ | 4 * SFP+ | 30AWG | 3M |
| DAC-SFP-P05 | DAC | 1.25G | SFP | SFP | 30AWG | 5M |
| Cable Type | Copper |
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| Active / Passive | Passive |
| Connector Type | QSFP+ to CX4 |
| Cable Gauge | 30 AWG |
| Cable Length | 5 m |
| Fiber Type / Mode | N/A |
| Jacket Type / Color | N/A |
| Features / Notes | DDR DAC | short-range high-speed |
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40G QSFP+ to CX4 DDR passive DAC cable
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30AWG copper construction for reliable high-speed transmission
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5-meter length suitable for short-reach interconnects
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Plug-and-play, no external power required
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Low-latency and energy-efficient performance
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Compact design for improved airflow and organized cabling
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OEM/ODM customizable for lengths, labeling, and packaging
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High-speed data center switch-to-server connections
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Enterprise network backbone links
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Storage area networks (SANs) and server clusters
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Short-reach high-bandwidth interconnects
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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.
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