Cisco SFP-H25G-CU1.5M
25GBASE-CU SFP28 Cable 1.5 Meter, Original Cisco
Product Highlights
As data center densities increase and server-to-switch bandwidth demands grow, every interconnect must deliver reliable, low-latency performance without unnecessary cost or complexity. The Cisco SFP-H25G-CU1.5M is a 25GBASE-CU SFP28 passive direct attach copper (DAC) twinax cable that provides a simple, cost-effective 25 Gigabit Ethernet link over a 1.5-meter (5 ft) distance.
Designed for short-reach connectivity within data center racks and between adjacent cabinets, this passive copper cable eliminates the need for separate transceivers and fiber patch cords. With SFP28 connectors on both ends, it plugs directly into any compatible Cisco platform's 25G SFP28 port — no additional optics, no power-hungry active electronics, and no complex fiber routing.
As an original Cisco product, the SFP-H25G-CU1.5M is factory-coded for seamless recognition on Cisco Nexus, Catalyst, and other SFP28-equipped platforms. It complies with IEEE 802.3by and SFF-8402 standards, and supports Fibre Channel over Ethernet (FCoE) with appropriate host software. Whether you're building out a new leaf-spine fabric or refreshing server uplinks, this DAC cable delivers the density, reliability, and value that modern 25G deployments demand.
Features & Benefits
Passive Direct Attach Copper
The SFP-H25G-CU1.5M uses passive copper twinax technology — no active electronic components or optical lasers are involved. This means zero additional power consumption at the cable level, fewer potential failure points compared to optical links, and a significantly lower cost per port for short-distance 25G connections.
25 Gbps SFP28 Performance
Built on the SFP28 form factor and rated for 25GBASE-CR1, this cable delivers a full 25 Gbps of bandwidth per link. It is compliant with IEEE 802.3by and SFF-8402 standards, ensuring interoperability across standards-based 25G infrastructure.
Genuine Cisco Compatibility
As an original Cisco cable, the SFP-H25G-CU1.5M is factory-programmed with the correct EEPROM data for immediate recognition on supported Cisco platforms. There is no risk of compatibility warnings or unsupported-transceiver messages that can occur with third-party alternatives.
FCoE Ready
Cisco's 25G DAC cables support Fibre Channel over Ethernet (FCoE) with appropriate host software, enabling converged LAN and SAN traffic over a single cable. This simplifies cabling infrastructure and reduces the total number of adapters and cables required.
Hot-Pluggable & Easy to Deploy
The SFP28 connectors on each end are hot-pluggable, allowing installation and replacement without powering down the host device. The 1.5-meter length is optimized for within-rack and short cross-rack connections, keeping cable management clean and airflow unobstructed.
Deployment Scenarios
Top-of-Rack Server Uplinks
Connect servers equipped with 25G SFP28 NICs directly to top-of-rack leaf switches using a low-cost, low-latency passive copper link. The 1.5-meter reach covers typical rack depths and short inter-cabinet distances without the expense of optical transceivers.
High-Performance Computing Clusters
In HPC environments where nodes are densely packed and latency is critical, passive DAC cables provide the lowest-latency 25G interconnect available. The SFP-H25G-CU1.5M keeps cabling simple and eliminates optical alignment concerns.
Data Center Leaf-Spine Fabric (Short Reach)
For leaf-to-spine connections within the same row or adjacent racks, this 1.5m DAC cable offers a cost-effective alternative to optical modules. It is ideal for brownfield upgrades from 10G to 25G where existing cable trays can accommodate copper twinax.
Converged LAN/SAN with FCoE
Organizations running Fibre Channel over Ethernet can use this cable to carry both storage and network traffic on a single 25G link, reducing adapter count and simplifying the physical layer in converged data center architectures.
General
Performance
Physical
Environmental
Compliance
Compatibility Notes
The SFP-H25G-CU1.5M is compatible with Cisco platforms that have SFP28 ports supporting 25GBASE-CR1. Compatible platforms include (but are not limited to):
- Cisco Nexus 9000 Series — N9K-C92160YC-X, N9K-C92300YC, N9K-C93180YC-EX, N9K-C93180YC-FX, N9K-C93180YC-FX3, N9K-C93240YC-FX2, N9K-C9348GC-FXP, N9K-X97160YC-EX
- Cisco Nexus 3000 Series — C36180YC-R
- Cisco Catalyst 9500 Series — C9500-24Y4C, C9500-48Y4C
- Cisco Catalyst 9200 Series — 25G Network Module, 9200L 25G Fixed Uplink Models
Always verify compatibility using the Cisco Transceiver Module Group (TMG) Compatibility Matrix for your specific platform and software version.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| SFP-H25G-CU1M | Cisco 25GBASE-CR1 SFP28 DAC 1m | Shorter 1-meter reach — best for within-rack connections where 1.5m is not needed |
| SFP-H25G-CU2M | Cisco 25GBASE-CR1 SFP28 DAC 2m | Longer 2-meter reach — provides extra length for cross-rack connections |
| SFP-H25G-CU3M | Cisco 25GBASE-CR1 SFP28 DAC 3m | 3-meter reach for wider rack spacing; still passive copper |
| SFP-25G-AOC2M | Cisco 25GBASE-AOC SFP28 Active Optical Cable 2m | Active optical cable — lighter weight and immune to EMI, but higher cost and power draw |
