25G SFP28 Passive DAC Twinax Copper Cable (0.5-7m): 25G-PDAC-SFP28

Our EDGEOPTIC 25G-PDAC-SFP28 is a multi-vendor compatible 25G SFP28 passive direct attach copper cable designed for high-performance 25 Gigabit Ethernet and 32G Fiber Channel applications within modern data center environments. The 25G-PDAC-SFP28 cable features point-to-point configuration with SFP28 connectors on both ends, delivering reliable high-bandwidth connectivity for server-to-switch interconnects, storage connections, and leaf-spine network architectures where 25G has become the standard server connectivity speed.

The cable supports multi-rate operation from 1.25 to 25.78 Gbps, accommodating both current and legacy network protocols. For Ethernet deployments, the cable handles 10G Ethernet at 10.31 Gbps and 25G Ethernet at 25.78 Gbps, providing backward compatibility for mixed-speed network environments during infrastructure transitions. Fiber Channel support includes 32G FC at 28.05 Gbps, making the cable well-suited for next-generation storage area network connectivity where 32G FC is becoming the dominant SAN speed for high-performance enterprise storage systems.

As a passive DAC solution, the 25G-PDAC-SFP28 requires no external power and introduces zero latency to signal transmission, making it ideal for latency-sensitive applications such as financial trading platforms, real-time analytics, and distributed computing workloads. The cable construction utilizes high-quality twinax copper with optimized wire gauges for each length range: AWG30 for 0.5 to 3 meters, AWG26 for 3.5 to 5 meters, and AWG24 for the 7-meter variant. This progressive wire gauge selection ensures optimal signal integrity at 25 Gbps NRZ signaling while maintaining practical cable flexibility for installation in high-density server environments.

The electrical interface conforms to SFP28 MSA, SFF-8402, and SFF-8431 specifications, ensuring broad compatibility with standard SFP28 host systems from multiple equipment vendors. Our 25G SFP28 DAC cables can be encoded for compatibility with over 80 different equipment brands including major server, networking, and storage vendors. The cable incorporates DDM/DOM (Digital Diagnostic Monitoring) functionality, providing real-time diagnostic data including module temperature and supply voltage through the MSA-compatible interface for proactive network monitoring.

The cable operates within a 0 to 70°C temperature range, suitable for controlled data center environments. With an MTBF rating of 1,000,000 hours, the cable delivers long-term reliability for mission-critical infrastructure deployments.

Typical deployment scenarios include server NIC to ToR switch connectivity, storage array connections, and high-density blade server interconnects. The 25G speed tier offers an optimal balance between bandwidth and cost, providing 2.5× the throughput of 10G while utilizing the same SFP form factor footprint, making upgrades straightforward and economical.

Our 25G SFP28 passive DAC is CE/RoHS certified and compliant with product safety standards. Because our focus is providing top quality service, we perform comprehensive quality checks before delivery including electrical parameter measurements, connector inspection tests, and SFP28 EEPROM memory data validation tests.