SFP-H25G-CU3M – 25G SFP28 DAC – 3m Passive Copper – BASE-R FEC
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SFP-H25G-CU3M Description
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 uses SFP28 connectors at both ends, provides a fixed 3-meter copper reach, and is identified by Cisco as an orange-latch passive DAC with 0.1W maximum power consumption. For BOM matching, it fits data center, campus, and UCS fabric interconnect cabling workflows where Cisco compatibility documentation confirms the host platform and software support, including the BASE-R FEC requirement for this 3-meter cable.
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 |
|
Ethernet 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 degrees C |
|
Compatibility reference |
Cisco Transceiver Module Group Compatibility Matrix |
Application Scenarios
SFP-H25G-CU3M fits Cisco SFP28 port paths where a fixed 3-meter passive copper assembly reaches the installed route without changing to active optical media.
Cisco Catalyst 9200 release notes list SFP-H25G-CU3M for C9200L Multigigabit Ethernet models with 25G uplinks. Catalyst 9300 release notes also list the PID for the 25G uplink network-module path, so the host software and port check should include the FEC mode.
Cisco UCS 6600 documentation lists SFP-H25G-CU3M as a 25GBASE-CU SFP28 3-meter cable on unified ports. Keep it separate from 2-meter no-FEC copper spares and from SFP-25G-AOC3M active optical spares during receiving.
Product Comparison
|
Parameter |
SFP-H25G-CU3M |
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 |
3 meters |
2.5 meters |
4 meters |
3 meters |
|
Pull tab or bail latch color |
Orange |
Yellow |
Green |
Orange |
|
Maximum power consumption |
0.1W |
0.1W |
0.1W |
1W |
|
Host FEC requirement |
BASE-R FEC required |
BASE-R FEC required |
RS-FEC required |
BASE-R FEC or RS-FEC required |
|
Ordering description |
25GBASE-CR1 SFP28 Passive Copper Cable, 3-meter |
25GBASE-CR1 SFP28 Passive Copper Cable 2.5-meter |
25GBASE-CR1 SFP28 Passive Copper Cable 4-meter |
25GBASE-AOC SFP28 Active Optical Cable, 3-meter |
- In a SFP-H25G-CU3M vs SFP-H25G-CU2.5M comparison, both are passive copper SFP28 DACs that require BASE-R FEC, but the current SKU changes the fixed cable length from 2.5 meters to 3 meters and uses the orange marker instead of yellow.
- The SFP-H25G-CU3M difference from SFP-H25G-CU4M is the FEC class: the 3-meter passive copper cable needs BASE-R FEC, while the 4-meter passive copper cable moves to RS-FEC.
- SFP-H25G-CU3M vs SFP-25G-AOC3M is a same-length comparison between passive copper and active optical 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, FEC behavior, marker color, and Cisco host-support result against the actual BOM.
Selection Guide
1. Choose the 3-meter copper order for a measured short route
Select SFP-H25G-CU3M when the Cisco SFP28 path needs a fixed 3-meter passive copper assembly and the host ports can run the required BASE-R FEC mode.
2. Do not apply the 1-meter or 2-meter no-FEC rule
SFP-H25G-CU1M and SFP-H25G-CU2M are shorter passive copper PIDs that Cisco places in the no-FEC group, so they are not drop-in length substitutes for this 3-meter order.
3. Keep the 4-meter RS-FEC cable separate
SFP-H25G-CU4M remains in the same passive copper family, but its 4-meter length changes the host-port FEC requirement to RS-FEC.
4. Verify the exact Cisco host entry
Check the target switch, fabric interconnect, adapter, port type, software context, and Cisco compatibility result before adding SFP-H25G-CU3M to the approved quote.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Order identity |
The line item uses SFP-H25G-CU3M rather than a nearby passive copper or AOC PID |
The 25G cable family has several near-length entries with different media and FEC behavior |
|
Cable routing |
The rack layout leaves a usable 3-meter path after cable managers and bend space are considered |
A fixed DAC cannot be trimmed or extended after it is received |
|
Copper DAC family |
The design requires SFP28-to-SFP28 25GBASE-CR1 passive copper |
Prevents a same-length active optical cable or an optical transceiver pair from replacing the copper assembly |
|
FEC mode |
The target ports support BASE-R FEC for the 3-meter copper entry |
This SKU is not in the no-FEC short-cable group and is not the RS-FEC 4-meter or 5-meter group |
|
Cisco host record |
Cisco compatibility documentation covers the host platform, port type, adapter, and software combination |
Support depends on the exact host context, not only on the SFP28 connector shape |
|
FCoE service |
Any planned FCoE path has the appropriate host software support |
Cisco’s FCoE statement for 25G DACs is conditional on host software |
|
Warehouse marker |
The orange latch or pull tab agrees with the label after the PID scan |
Color is useful secondary evidence but should never override the part number |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | SFP-H25G-CU3M | Product type | 25GBASE-CR1 SFP28 passive copper cable |
| 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 | Ethernet 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 | 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-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 | 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 is SFP-H25G-CU3M?
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When is SFP-H25G-CU3M selected?
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Can SFP-H25G-CU3M operate in 10G ports?
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How is SFP-H25G-CU3M different from AOC?
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What cable management issue affects SFP-H25G-CU3M?
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What endpoint check matters for SFP-H25G-CU3M?
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Where is SFP-H25G-CU3M a poor choice?
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