The 3m 40G QSFP+ to 4x10G SFP+ Breakout Direct Attach Copper Cable (DAC) is a passive interconnect solution that splits a single 40G QSFP+ port into four discrete 10G SFP+ channels. Utilizing high-performance AWG24 Twinax copper, this 3-meter cable ensures maximum signal integrity and zero power consumption. it is the ideal cost-effective choice for connecting 40G switches to 10G servers or storage arrays in high-density data center racks.
UnitekFiber high-speed cable (DAC) is exterminated with a QSFP+ connector on one end, and four 10G SFP+ connectors on the other end to connect 40G devices and 10G devices, suitable for 10G and 40G network connections. By using passive copper technology to provide reliable transport connections without the need for an additional power supply. The DAC cables provide a cost-effective solution for interconnecting equipment in telecommunication carrier's server room or data center for short distance transmission.
At 3 meters, the choice of wire gauge (AWG) is critical to combat signal attenuation.
| Feature | 40G Breakout DAC (3m, AWG24) | 40G Breakout DAC (3m, AWG30) |
| Wire Thickness | AWG24 (Thicker Conductor) | AWG30 (Thinner Conductor) |
| Insertion Loss | Lower (Better Signal Margin) | Higher (Edge of threshold) |
| Durability | High (Robust Industrial Grade) | Moderate (Easier to bend) |
| Power Consumption | 0W (Passive) | 0W (Passive) |
| Latency | Nanoseconds (Near Zero) | Nanoseconds (Near Zero) |
| Standard | SFF-8436 / SFF-8431 | SFF-8436 / SFF-8431 |
lHot-plug stoppable
l3X Port Density over SFP / SFP+
lOptimized NEXT & Return Loss
lLow cost and low power solution compared to fiber optical cable
lCompliant with Q SFP+ MSA and SFF-8436
lCompliant with IEEE 802.3ba/ Infiniband QDR specifications
lEnhanced EMI/EMC performance
lSupports serial ID functionality thru EEPROM
lPassive cable assembly supports distances up to 7 meters
l30AWG to 24AWG cable sizes available
lRoHS compliant and Halogen-Free option available
lSwitches / Routers / HBAs/SAN, NIC cards
lServer & Storage Devices
lData Center Networking
lHigh Performance Compute
lFiber Channel
lInfiniBand QDR/DDR
l10Gbs/40Gbs Ethernet
The 40G to 4x10G Breakout DAC is the standard for Legacy Migration. It allows you to maximize the high-density ports of a new 40G Core switch while still utilizing existing 10G server infrastructure.
This DAC Cable feature with 40G QSFP fiber transceiver, which could be compatible with different switches brands, likes Cisco, Juniper, H3C, Huawei, Alcatel, Allied Telesis, Zyxel, Brocade, Mikrotik, Extreme, Blade, D-linnk Netgear, Finisar, ZTE, Linksys, SMC, Ruijie, Avaya, 3com, Enterasys, Redeback, Planet etc.
The 40G QSFP to 4*10G SFP+ DAC cable are engineered with a focus on low power consumption, delivering energy-efficient networking solutions without compromising performance. By optimizing efficiency and reducing energy usage, the branch DAC copper cable offer a sustainable solution. Additionally, their reliability and seamless integration capabilities ensure that can enhance network infrastructure without sacrificing efficiency. By choosing branch Direct Attach Copper Cable with low power consumption, can create a more energy-efficient and sustainable networking environment while achieving cost savings.
One of the main functions of DAC cables is to provide cost-effective networking solutions for short distance connections. As an alternative to optical transceivers and fiber optic cabling, 40G transceiver module DAC cable offer comparable performance at a lower cost, making them an economical choice for high-speed data transmission in limited network spaces. By eliminating the need for separate transceivers and fiber optic cabling, direct attach copper cable simplify the network setup process, reducing complexity and simplifying connection configuration. This simplicity means easier installation, maintenance and upgrades, increasing the overall agility of the network infrastructure.
Many clients worry that AWG24 is too stiff for tight rack spaces. While it is more robust, the trade-off is unbeatable link stability. If you are running mission-critical 10G storage traffic over a 3-meter jump, the extra copper in our AWG24 cable acts as an insurance policy against EMI and signal drops common in thinner, cheaper alternatives.
Moving from 10G to 40G doesn't have to be a compatibility nightmare. Whether you are struggling with multi-vendor handshaking (e.g., Cisco switch to Dell servers) or trying to calculate the thermal impact of different cable gauges in your rack, UnitekFiber is here to guide you. We can provide custom coding for each end of the breakout cable and help you select the ideal AWG for your specific airflow requirements.
Not sure if AWG24 is the right fit for your patch panel density? Let's discuss your rack layout and find the most reliable path.
Consult our experts:
AWG24 has less electrical resistance and signal loss. For 3-meter 10G/40G links, it provides a much more stable connection with a better signal-to-noise ratio than thinner AWG30 cables.
Yes. UnitekFiber provides multi-vendor coding. We can flash the 40G QSFP+ end for Cisco and the four 10G SFP+ ends for HP (or any other brand) to ensure 100% Plug-and-Play operation.
On most switches, you simply need to set the 40G port to Breakout Mode in the CLI. The cable itself is passive and requires no power or additional firmware.
Yes, the 40G AOC/DAC cable has a QSFP+ to 4*SFP+ branch cable. Using this specification cable, the 40G port and the 10G port can be interconnected.
The longest transmission distance of copper cable DAC is 7M.
The transmission medium of DAC is copper cable.
This product do a well work on the data center, absolutely save the space, save the installation time and could be manage the cable better than before. Highly recommended.
We've been using branch direct attach copper cables for interconnecting our servers, and they have exceeded our expectations.
Branch direct attach copper cables have proven to be a fantastic choice for our organization. They deliver the speed and reliability we need without breaking the bank.
The branch direct attach copper cables have been a game-changer for our network. We've experienced faster data transfers and minimal latency issues since deploying these cables.
Very good service and quality.
The fiber cable was very easy to pull both indoor & outdoor. It's not stiff, went thru conduits nicely.
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