| NO. | Brand | Compatible P/N | Remarks |
| 1 | Cisco | QSFP-4SFP25-CU5M | |
| 2 | Arista Networks | CAB-Q28-S28-5M | |
| 3 | Brocade | 100G-Q28-S28-C-0501 | |
| 4 | Huawei | QSFP-4SFP25G-CU5M | |
| 5 | Juniper | QFX-Q-S-DAC-5M |
This 3-meter breakout DAC cable connects one 100G QSFP28 port to four 25G SFP28 ports. fully compatible with Huawei equipment and replaces Huawei QSFP-4SFP25G-CU3M line.
Designed for short distances, the passive copper breakout DAC cable requires zero power to operate, provides ultra-low latency, offering highly cost-effective alternative to expensive optical transceivers and fiber patch cords.
It offers cost-effective interconnect solution for data centers,seamlessly merges 100G switches with 25G host adapters, switches, and high-speed enterprise servers.
CloudEngine 16800 Series: CE16804, CE16808, CE16816 (using compatible 100G line cards)
CloudEngine 9800 Series: CE9860-4C-EI, CE9855-32HQ-EI
CloudEngine 8800 Series: CE8861-4C-EI, CE8868-4C-EI, CE8850-64C-EI
CloudEngine 6800 Series (100G Ports): CE6865-48S6CQ-EI, CE6857-48S6CQ-EI, CE6881-48S6PQ-H, CE6820-48S6CQ
NetEngine Routers: NE40E and NE8000 series (on line cards natively supporting QSFP28 breakout configurations)
100G to 4x25G Port Splitting: Maximizing bandwidth by migrating a single high-density 100G switch port into four independent 25G channels.
ToR Switch-to-Server Distribution: Directly connecting a 100G Top-of-Rack (ToR) Huawei CloudEngine switch to up to four downstream servers or storage nodes equipped with 25G network interface cards (NICs).
Storage Cluster Networking: Linking flash-based NVMe storage arrays requiring 25G throughput to a centralized 100G core fabric.
Intra-Rack Green Efficiency: Consolidating networking gear within the same 5-meter rack space with a 0W power consumption profile to reduce heat and cooling costs.
| Huawei Compatible | QSFP-4SFP25G-CU5M | Vendor Name | HYTOPTODEVICE |
| Connector | QSFP28 to 4xSFP28 | Max Data Rate | 100Gbps |
| Cable Length | 5m (16ft) | AWG | AWG 26 |
| Jacket Material | PVC(OFNR) | Minimum Bend Radius | 30mm |
| Operation Temperature | 0~ 70 °C (32 to 158°F) | Protocols | 100G Ethernet, InfiniBand EDR |
Q1: What does the part number "QSFP-4SFP25G-CU5M" mean? A1: It decodes as follows: QSFP indicates the 100G QSFP28 master connector; 4SFP25G means it splits into four 25G SFP28 connectors; CU stands for copper (passive twinax); and 5M defines its 5-meter length.
Q2: Can I use this DAC cable to connect a Huawei switch to a switch from another brand? A2: Yes, but you need a "dual-compatible" version where one end is coded for Huawei and the other end is coded for the other brand (e.g., Cisco, Dell, or HPE).
Q3:Is the QSFP-4SFP25G-CU5M an active or passive cable? A3: No, it's a passive breakout DAC cable. It contains no active signal amplification circuitry, nearly zero power consumption and low latency.
Q4: Is a 5-meter passive copper cable reliable for 100G breakout signaling? A4: Yes. While 5 meters is the absolute maximum limit for standard passive 100G/25G copper twinax, this cable uses thicker, premium shielded copper wire (usually 26AWG) to minimize attenuation and guarantee stable data packet transmission over the full distance.
Q5:Can I use this Huawei-coded DAC cable to connect a Huawei switch to a Cisco or HPE switch?A5:If you use a standard Huawei-coded cable, the Cisco/HPE end might reject it due to vendor locking. For cross-vendor environments, it is highly recommended to order a Dual-Vendor Coded Cable (Huawei-coded on End A, and Cisco/HPE-coded on End B) to ensure seamless plug-and-play compatibility on both sides.
Q6: Can I get this cable programmed for mixed-vendor setups? A6: Yes! We can custom-code the 100G end for a Huawei switch, and the four 25G ends for another brand (like Cisco, Dell, or HPE server NICs). Please specify your requirements when ordering.
Q7:Will Huawei EOS recognize this cable as genuine? A7: Yes. Our compatible breakout cables are flashed with the authentic Huawei vendor profile. The switch will recognize it as a QSFP-4SFP25G-CU3M.
Q8:Can I use this DAC cable to break out a 40G port into four 10G ports? A8: No. This cable is specifically tuned and coded for 100G-to-4x25G applications. For 40G-to-10G setups, you must use a dedicated 40G breakout cable (such as the Huawei QSFP-4SFP10G-CU5M).
Q9: Does this passive copper breakout cable consume switch power? A9: No, it consumes 0W of power. Because it does not use optical lasers or power-amplifying chips, it acts as a pure copper channel, minimizing your data center's thermal and electrical load.
Q10: What happens if I only plug in two or three of the 25G SFP28 ends? A10: The connected legs will work perfectly fine. The channels operate independently. The unused SFP28 ends can be left disconnected without affecting the traffic on the active legs.
HYTOPTODEVICE has supplied over 200,000 passive Direct Attach Copper(DAC) cable to data centers and enterprise networks across 100+ countries since 2011. Every passive DAC cable undergoes comprehensive 100% performance, signal integrity, and compatibility testing before shipment。
"We replaced 100 Cisco-branded DACS with HYTOPTODEVICE equivalents across our spine layer — zero compatibility issues, 40% cost reduction."— Network Architect, Tier-2 ISP, England
Quality Certification & Compliance：
At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From passive DAC cable manufacturing to final inspection, our processes ensure global compliance and reliability.
We adhere to rigorous standards for our passive DAC cable and network solutions:
ISO 9001: Certified quality management and production consistency.
CE & FCC: Fully compliant for seamless Global Market Access.
RoHS: Committed to environmental responsibility and hazardous material control.
Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.
Certified Quality. Global Standards. Guaranteed Performance.
