The QSFP28 to 4×25G SFP28 Passive Direct Attach Cable (DAC) provides a cost-efficient, low-latency solution for breaking out a single 100G QSFP28 port into four independent 25G SFP28 copper links. Designed for short-reach connections in telecom equipment rooms and high-density data-center environments, this passive twinax cable delivers reliable performance without the need for active components or external power.
Engineered to meet IEEE 802.3bj, SFF-8402, and SFF-8665 industry standards, the cable ensures full interoperability with switches, servers, NICs, and other QSFP28/SFP28-based networking devices. With excellent signal integrity, minimal crosstalk, and robust mechanical construction, it is an ideal choice for cost-effective 25G/100G deployments.
Key Features
• QSFP28 ? 4×25G SFP28 passive copper breakout
• Supports up to 100Gbps aggregate bandwidth
• Compliant with IEEE 802.3, QSFP28 MSA, SFF-8665, SFF-8402
• Passive twinax construction for ultra-low latency
• High-quality 30AWG cable
• 4 × 25G NRZ modulation format
• Minimum bend radius: 60 mm
• Power consumption = 0.125W
• 3.3V power supply (host)
• MTBF = 50 million hours
• Jacket material: PVC (OFNR)
• Operating temperature: 0 to 70°C (32–158°F)
• RoHS compliant
Applications
• 100G to 4×25G Ethernet
• Server and NIC breakout connections
• Top-of-Rack (ToR) and End-of-Row (EoR) architectures
• High-density cloud and enterprise data centers
• Telecom operator equipment rooms
• Copper-based short-reach interconnects