| NO. | Brand | Compatible P/N | Remarks |
| 1 | Cisco | QSFP-100G-CU3M | |
| 2 | Arista Networks | CAB-Q-Q-100G-3M | |
| 3 | Brocade | 100G-Q28-Q28-C-0301 | |
| 4 | Huawei | QSFP28-100G-CU3M | |
| 5 | Juniper | QFX-QSFP28-DAC-3M | |
| 6 | Dell | DAC-Q28-100G-3M |
The 100G QSFP28 Passive DAC cable is Dell compatible and equivalent to Dell DAC-Q28-100G-3M . It provides a highly cost-effective, short-distance 100 Gigabit link between QSFP28 ports. It is a Copper Twinax Cable ,designed for high-density, short-range interconnects within Dell PowerSwitch environments and links to industry-standard server NICs.
Compatibility and Supported DevicesZ-Series Core & Aggregation Switches: * Z9100-ON, Z9264F-ON, Z9332F-ON, Z9432F-ON
S-Series ToR (Top-of-Rack) Data Center Switches:
S5148F-ON, S5232F-ON, S5248F-ON, S5296F-ON
S6100-ON (with 100G QSFP28 modules)
N-Series Campus Core Switches:
N3248PX-ON, N3248X-ON (when utilizing 100G uplink ports)
This cable seamlessly connects Dell PowerEdge servers (e.g., R650, R750, R660, R760) equipped with the following 100G PCIe or OCP 3.0 mezzanine cards:
Mellanox/NVIDIA ConnectX-5 / ConnectX-6 DX 100GbE Dual Port Adapters
Intel E810-CQDA2 100GbE QSFP28 Adapters
Broadcom NetXtreme-E BCM57508 100GbE Adapters
High-Speed Storage Area Networks (SANs): Extensively used to connect Brocade’s industry-leading Fibre Channel and IP storage switches to high-density storage arrays and flash storage systems.
Intra-Rack Switching (ToR): Perfect for Top-of-Rack (ToR) deployment where switches need to connect to adjacent servers or leaf switches within the same 2-meter proximity.
Intra-Rack Switch-to-Switch Interconnects (Stacking & Virtual Chassis)
High-Performance Computing (HPC) & AI Clustering
Connecting compute nodes together for clustered processing or machine learning training.
| Dell Compatible | DAC-Q28-100G-3M | Vendor Name | HYTOPTODEVICE |
| Connector | QSFP28 to QSFP28 | Max Data Rate | 100Gbps |
| Cable Length | 3m (10ft) | AWG | AWG 26 |
| Jacket Material | PVC(OFNR) | Minimum Bend Radius | 50mm |
| Operation Temperature | 0~ 70 °C (32 to 158°F) | Protocols | 100 Gigabit Ethernet |
Q1: Is this passive DAC cable fully compatible with official Dell Networks hardware? A1: Yes. It is pre-programmed with Dell-compatible EEPROM code, allowing it to be recognized instantly by Brocade devices without triggering "Unsupported Transceiver" warnings.
Q2: Can I use this DAC cable to connect a Dell switch to a switch from another brand? A2: Yes, but you need a "dual-compatible" version where one end is coded for Dell and the other end is coded for the other brand (e.g., Cisco, Dell, or HPE).
Q3: Can this 3-meter cable be linked with a 4x25G breakout cable?? A3: No. The DAC-Q28-100G-3M is a direct attach copper cable, Its both connector type is QSFP28 to QSFP28.If your device requires splitting a 100G QSFP28 port into four 25G SFP28 ports, you must use a dedicated breakout cable.
Q4: What is the maximum distance supported by the DAC-Q28-100G-3M ? A4: As designated by the "3M" in the part number, the maximum physical length of this copper cable is 3 meter (10 feet), ideal for intra-rack setups.
Q5: Can I use this Dell-coded cable to connect a Dell switch to a Cisco or Arista switch? A5: If you use a standard Dell-coded cable, the Cisco/Arista end might reject it due to vendor locking. For cross-vendor environments, it is highly recommended to order a Dual-Vendor Coded Cable (Dell-coded on End A, and Cisco/Arista-coded on End B) to ensure seamless plug-and-play compatibility on both sides.
Q6: What is the gauge of the copper wire used in this cable? A6: This 3-meter cable typically utilizes high-quality 26AWG premium twinaxial copper wire to minimize insertion loss and maintain structural flexibility.
Q7: Can this cable be used in regular SFP+ or SFP28 ports? A7: No. This cable features QSFP28 connectors at both ends and is strictly physically and electrically compatible only with 100G QSFP28 or QSFP56 ports.
Q8: Does this passive DAC cable consume a lot of power? A8: Not. our Direct Attach Copper (DAC) cables are passive and consume near-zero power (<0.1W per end), that is far more energy-efficient than fiber optical transceivers or AOCs.
Q9: What should I do if my Brocade switch shows an "unsupported transceiver" error? A9: Ensure your switch is running updated firmware. If the message persists, you can bypass it on Arista networks by entering the global configuration commands: service unsupported-transceiver and no errdisable detect cause gbic-invalid.
Q10: Is this cable hot-swappable?Will hot-swapping damage the hardware? A10: Yes. it is hot-pluggable.you can plug in or remove the QSFP28 connectors without shutting down or damage the networking equipment.use it with peace mind.
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.
