SFP-H25G-CU3M: Cisco 25GBASE-CR Direct Attach Copper Cable 3m
Also listed as: 37-1422-01, SFP-H25G-CU3M=
The Cisco SFP-H25G-CU3M is a 3-meter passive direct attach twinax copper cable for 25GbE intra-rack server-to-switch connectivity.
Specifications
| Part number | SFP-H25G-CU3M |
|---|---|
| Brand | Cisco |
| Type | Cables |
| Other numbers | 37-1422-01, SFP-H25G-CU3M= |
| Status | current |
| Form factor | SFP28 to SFP28 |
| Speed | 25GbE |
| Length m | 3 |
| Cable type | Passive Twinax Copper |
| Wire gauge | 28 AWG |
About the SFP-H25G-CU3M
The Cisco SFP-H25G-CU3M is a 3-meter passive direct attach twinax copper cable assembly designed for 25 Gigabit Ethernet connections between top-of-rack switches and rack servers. It offers low power consumption, near-zero transmission latency, and robust shielding against electromagnetic interference. It is the preferred cabling medium for short-range intra-rack connections in enterprise data centers.
Compatibility
Supported on SFP28 ports of Cisco Nexus 9300 series switches, including Nexus 93180YC-FX and Nexus 93180YC-FX3. It links directly with PCIe 25GbE network interface cards from Cisco, Broadcom, Intel, and Marvell. It requires no configuration and establishes link status immediately upon connection.
How to identify a genuine unit
Features a black heavy-gauge twinax cable jacket with molded strain relief boots and integrated SFP28 metal connector shells. Each connector includes an orange pull-release tab and a serialized label showing Cisco part code SFP-H25G-CU3M. Both cable ends contain pre-programmed EEPROM chips recognized by NX-OS.
Buying used
Inspect the entire 3-meter cable length for sharp kinks, crushing damage, or jacket cuts that could degrade high-frequency 25Gbps signal integrity. Ensure that the locking latches on both SFP28 connector heads engage positively with switch and server ports without wobbling.
Fits these models
Check compatibility with Cisco
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Cisco has tested with the Cisco SFP-H25G-CU3M.
- Compatibility Cisco UCS Hardware Compatibility List
- Compatibility Cisco Optics-to-Device Compatibility Matrix
- Support Cisco Support and Downloads
FAQ
Does this cable require transceivers?
No, it features integrated SFP28 copper connectors permanently attached to the twinax cable.
What is the power consumption of passive DAC cables?
Passive DAC cables draw zero additional power from the switch or server port.
Buying or selling SFP-H25G-CU3M?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Cisco 25GBASE SFP28 Modules Data Sheet, checked 2026-10-27