SFP-H25G-CU3M – 25G SFP28 DAC – 3m Passive Copper – BASE-R FEC

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SFP-H25G-CU3M Description

The SFP-H25G-CU3M is a Cisco 25GBASE-CR1 SFP28 passive copper direct-attach cable for short 25 Gigabit Ethernet links between supported SFP28 host ports. It provides a fixed 3-meter reach with SFP28 connectors at both ends, an orange pull tab, and 0.1W maximum power consumption. The cable requires BASE-R FEC on the host ports.

Quick Specs

Parameter

Specification

Product ID

SFP-H25G-CU3M

Product type

25GBASE-CR1 SFP28 passive copper cable

Cable assembly type

Direct-attach copper cable assembly

Connector form

SFP28 at both cable ends

Data rate

25 Gigabit Ethernet

Cable length

3 meters

Pull tab or bail latch color

Orange

Maximum power consumption

0.1W

Host FEC requirement

BASE-R FEC required for this 3-meter copper cable

Operating temperature class

Commercial 0 to 70°C

Compatibility reference

Cisco Transceiver Module Group Compatibility Matrix

Application Scenarios

Adjacent Rack 25G Server Links

In a data center row, the 3-meter passive copper cable connects an SFP28 server or UCS fabric interconnect port to a switch in the neighboring rack, carrying 25 Gigabit Ethernet at 0.1W maximum power consumption.

Catalyst 9200L 25G Uplinks

In a campus wiring closet, the cable joins the 2x25G SFP28 uplink ports of a Catalyst 9200L Multigigabit switch to a nearby aggregation switch, with BASE-R FEC enabled on both ports.

Product Comparison

Parameter

SFP-H25G-CU3M

SFP-H25G-CU2.5M

SFP-H25G-CU4M

SFP-25G-AOC3M

Product type

25GBASE-CR1 SFP28 passive copper cable

25GBASE-CR1 SFP28 passive copper cable

25GBASE-CR1 SFP28 passive copper cable

25GBASE-AOC SFP28 active optical cable

Cable length

3 meters

2.5 meters

4 meters

3 meters

Connector form

SFP28 at both cable ends

SFP28 at both cable ends

SFP28 at both cable ends

SFP28 at both cable ends

Host FEC requirement

BASE-R FEC required

BASE-R FEC required

RS-FEC required

BASE-R FEC or RS-FEC required

Maximum power consumption

0.1W

0.1W

0.1W

1W

Pull tab or bail latch color

Orange

Yellow

Green

Orange

SFP-H25G-CU3M is the 3-meter, orange-latch passive copper cable of this group and needs BASE-R FEC on the host ports, the same class as SFP-H25G-CU2.5M, which is 0.5 meter shorter with a yellow latch. A route longer than 3 meters moves to SFP-H25G-CU4M, but that cable changes the host requirement to RS-FEC, so both SFP28 ports must be able to run it. Where the 3-meter run should use active optical media instead of copper, SFP-25G-AOC3M has the same length and orange latch, draws 1W against 0.1W, and accepts either BASE-R FEC or RS-FEC.

Ordering Checklist

  • Catalyst 9200L fixed 25G uplinks: Confirm the switch is a Catalyst 9200L model with 2x25G SFP28 uplink ports. Only the 25G uplink variants have SFP28 ports; the 4x1G and 4x10G uplink models take 1G SFP or 10G SFP+ modules.
  • Catalyst 9200 25G uplink module: Add C9200-NM-2Y (2x25G) in C9200-24PXG or C9200-48PXG. C9200-NM-2Y is supported only on those two C9200 models.
  • Catalyst 9300 25G uplink module: Add C9300-NM-2Y (2x25GE SFP28 slots) in a modular-uplink Catalyst 9300 switch. The 25G SFP28 slots sit on this uplink module, not on the 1G, 10G or 40G modules.

Specifications

Parameter Specification Parameter Specification
Product ID SFP-H25G-CU3M Product type 25GBASE-CR1 SFP28 passive copper cable
Cisco ordering description 25GBASE-CR1 SFP28 Passive Copper Cable, 3-meter Cable assembly type Direct-attach copper cable assembly
Connector form SFP28 at both cable ends Data rate 25 Gigabit Ethernet
Cable length 3 meters Media class Passive copper DAC
Pull tab or bail latch color Orange Maximum power consumption 0.1W
Host FEC requirement BASE-R FEC required for this 3-meter copper cable FCoE support condition Supported with appropriate host software support
Operating temperature class Commercial Operating temperature 0 to 70°C
Storage temperature -40 to 85°C Standards references SFF-8402, SFF-8472, IEEE 802.3, IEEE P802.3by
Catalyst 9200L support example C9200L Multigigabit Ethernet 25G uplink notes list SFP-H25G-CU3M among supported cables Catalyst 9300 support example Catalyst 9300 25G uplink network module notes list SFP-H25G-CU3M among supported PIDs
UCS 6600 support example Cisco lists SFP-H25G-CU3M as a 25GBASE-CU SFP28 3-meter cable for UCS 6600 unified ports Compatibility reference Cisco Transceiver Module Group Compatibility Matrix
Official support boundary Verify the exact host and software release in Cisco compatibility documentation

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Questions & Answers

  • From which IOS XE release is SFP-H25G-CU3M listed on the Catalyst 9300 C9300-NM-2Y uplink module?

    SFP-H25G-CU3M is listed for the Catalyst 9300 C9300-NM-2Y from IOS XE 16.8.1a, per the Catalyst 25G uplink release notes. That release is the Fuji 16.8.1a train, where the 25G copper cable family was introduced. Earlier releases do not list the cable on the module.
  • Does SFP-H25G-CU3M support FCoE traffic?

    Yes, SFP-H25G-CU3M supports FCoE when the host ports provide the matching software support. The cable itself carries the frames over its 25 Gigabit Ethernet copper pairs. Check that the switch or adapter software release enables FCoE on the SFP28 port before cabling.
  • What storage temperature range applies to SFP-H25G-CU3M?

    SFP-H25G-CU3M can be stored at -40 to 85°C, a wider band than its 0 to 70°C operating range. Cables kept in an unheated warehouse or a truck therefore stay within specification, but the cable must return to the commercial operating range before it is put into service.
  • Which standards does SFP-H25G-CU3M follow?

    SFP-H25G-CU3M references SFF-8402, SFF-8472, IEEE 802.3 and IEEE P802.3by. The SFF documents define the SFP28 form factor and the management interface, and IEEE P802.3by defines 25 Gigabit Ethernet. Use these references when a host vendor asks which specifications the cable assembly meets.

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DataSheet Downloads

  • SFP-H25G-CU3M Datasheet