SFP-H25G-CU2M – 25G SFP28 DAC – 2m Passive Copper – No FEC Required
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SFP-H25G-CU2M Description
SFP-H25G-CU2M is a Cisco 25GBASE-CR1 SFP28 passive copper direct-attach cable for 25 Gigabit Ethernet links between supported Cisco SFP28 host ports. This 2-meter DAC is used for short-reach switch, fabric interconnect, or server-adjacent connections where a fixed copper assembly is preferred over separate optical transceivers and fiber patch leads. Cisco identifies the cable as an SFP28-to-SFP28 passive copper assembly with brown pull tab or bail latch, 0.1W maximum power consumption, no FEC requirement for the 2-meter length, commercial temperature operation, and compatibility that must be checked against the Cisco Transceiver Module Group Compatibility Matrix for the exact host platform and software release.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
SFP-H25G-CU2M |
|
Product type |
25GBASE-CR1 SFP28 passive copper cable |
|
Cable assembly type |
Direct-attach copper cable assembly |
|
Connector form |
SFP28 at both cable ends |
|
Ethernet rate |
25 Gigabit Ethernet |
|
Cable length |
2 meters |
|
Pull tab or bail latch color |
Brown |
|
Maximum power consumption |
0.1W |
|
Host FEC requirement |
No FEC required for this 2-meter copper cable |
|
Compatibility reference |
Cisco Transceiver Module Group Compatibility Matrix |
Application Scenarios
SFP-H25G-CU2M fits Cisco SFP28 port pairs where the installed path needs a fixed 2-meter passive copper assembly, such as adjacent rack equipment or a cabinet route with extra dressing space.
Cisco Catalyst 9200 release notes list SFP-H25G-CU2M among supported cables for C9200L Multigigabit Ethernet models with 25G uplinks. Catalyst 9300 release notes also list the PID under the C9300-NM-2Y 25G uplink network module, so the final platform check should use Cisco compatibility documentation.
Cisco UCS 6600 documentation lists SFP-H25G-CU2M as a 25GBASE-CU SFP28 2-meter cable on unified ports. Keep it separate from QSA-based 25G paths and from 100G breakout copper cables during receiving.
Product Comparison
|
Parameter |
SFP-H25G-CU2M |
SFP-H25G-CU2.5M | ||
|---|---|---|---|---|
|
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 assembly type |
Direct-attach copper cable assembly |
Direct-attach copper cable assembly |
Direct-attach copper cable assembly |
Active optical cable assembly |
|
Connector form |
SFP28 at both cable ends |
SFP28 at both cable ends |
SFP28 at both cable ends |
SFP28 at both cable ends |
|
Ethernet rate |
25 Gigabit Ethernet |
25 Gigabit Ethernet |
25 Gigabit Ethernet |
25 Gigabit Ethernet |
|
Cable length |
2 meters |
1 meter |
2.5 meters |
2 meters |
|
Pull tab or bail latch color |
Brown |
Beige |
Yellow |
Brown |
|
Maximum power consumption |
0.1W |
0.1W |
0.1W |
1W |
|
Host FEC requirement |
No FEC required |
No FEC required |
BASE-R FEC required |
BASE-R FEC or RS-FEC required |
|
Ordering description |
25GBASE-CR1 SFP28 Passive Copper Cable, 2-meter |
25GBASE-CR1 SFP28 Passive Copper Cable, 1-meter |
25GBASE-CR1 SFP28 Passive Copper Cable, 2.5-meter |
25GBASE-AOC SFP28 Active Optical Cable, 2-meter |
- In a SFP-H25G-CU2M vs SFP-H25G-CU1M comparison, both are no-FEC passive copper SFP28 DACs, but the current PID changes the fixed route length from 1 meter to 2 meters and uses a brown latch instead of beige.
- The SFP-H25G-CU2M difference from SFP-H25G-CU2.5M is not only half a meter of length; the 2.5-meter passive copper cable requires BASE-R FEC while the 2-meter PID does not.
- SFP-H25G-CU2M vs SFP-25G-AOC2M is a 2-meter comparison between passive copper and active optical cable media, with the AOC listed at 1W rather than the 0.1W copper-cable value.
- For which model to choose, match cable family, fixed length, latch color as a receiving aid, host FEC behavior, and Cisco compatibility result against the BOM.
Selection Guide
1. Use the 2-meter passive copper PID for a measured 25G path
Choose SFP-H25G-CU2M when the Cisco SFP28 connection needs more installed length than the 1-meter DAC but still fits a short passive copper route.
2. Keep FEC planning tied to the exact length
Do not apply the longer-cable rule to this SKU: Cisco places 1m, 1.5m, and 2m passive copper cables in the no-FEC group, while SFP-H25G-CU2.5M starts the BASE-R FEC group.
3. Avoid substituting active optical cable for the same reach
SFP-25G-AOC2M has the same 2-meter length and brown pull tab, but it changes the assembly type to active optical cable and carries a higher listed maximum power value.
4. Confirm the exact Cisco host entry
Validate the switch, fabric interconnect, adapter path, port type, and software context in Cisco compatibility documentation before approving SFP-H25G-CU2M for a specific port.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact PID |
The purchase line and receiving label show SFP-H25G-CU2M |
Prevents a 1m, 2.5m, 3m, or AOC cable from filling the wrong order line |
|
Installed route |
The physical run fits a fixed 2-meter assembly with cable management included |
Passive DAC assemblies are ordered by fixed length and cannot be adjusted in the field |
|
Media family |
The BOM calls for 25GBASE-CR1 SFP28 passive copper |
Keeps passive copper DAC lines separate from AOC, SR, LR, and breakout cable families |
|
FEC behavior |
The host plan reflects no FEC required for the 2-meter passive copper PID |
Avoids applying BASE-R or RS-FEC rules intended for longer copper or AOC cables |
|
Host support |
Platform, port, adapter, and software support are checked in Cisco compatibility documentation |
SFP28 connector fit does not prove the cable is supported on the target host |
|
FCoE condition |
Any FCoE use includes the required host software support |
Cisco ties FCoE support to the host software context |
|
Receiving marker |
Brown latch or pull-tab color matches the 2-meter copper cable after PID scan |
The color is a useful warehouse check but does not replace exact PID verification |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | SFP-H25G-CU2M | Product type | 25GBASE-CR1 SFP28 passive copper cable |
| Ordering description | 25GBASE-CR1 SFP28 Passive Copper Cable, 2-meter | Cable assembly type | Direct-attach copper cable assembly |
| Connector form | SFP28 at both cable ends | Ethernet rate | 25 Gigabit Ethernet |
| Cable length | 2 meters | Media class | Passive copper DAC |
| Pull tab or bail latch color | Brown | Maximum power consumption | 0.1W |
| Host FEC requirement | No FEC required for this 2-meter copper cable | FCoE support condition | Supported with appropriate host software support |
| Operating temperature class | Commercial | Commercial operating temperature | 0 to 70 degrees C |
| Storage temperature range | -40 to 85 degrees 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-CU2M among supported cables | Catalyst 9300 support example | Catalyst 9300 25G uplink network module notes list SFP-H25G-CU2M among supported PIDs |
| UCS 6600 support example | Cisco lists SFP-H25G-CU2M as a 25GBASE-CU SFP28 2-meter cable for UCS 6600 unified ports | Standard warranty | 5 years |
| Compatibility reference | Cisco Transceiver Module Group Compatibility Matrix | Official support boundary | Verify the exact host and software release in Cisco compatibility documentation |
Get More Information
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Questions & Answers
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What does SFP-H25G-CU2M connect?
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Why use SFP-H25G-CU2M for server access?
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Can SFP-H25G-CU2M be used in 10G SFP+ ports?
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What length constraint applies to SFP-H25G-CU2M?
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How does SFP-H25G-CU2M affect airflow?
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Why do link errors occur with SFP-H25G-CU2M?
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Is SFP-H25G-CU2M a transceiver or a cable?
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What procurement detail matters for SFP-H25G-CU2M?
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