QSFP-H40G-CU5M – 40G QSFP DAC – 5m Length – Passive Copper Cable
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QSFP-H40G-CU5M Description
QSFP-H40G-CU5M is a Cisco 40GBASE-CR4 QSFP+ passive direct-attach copper cable assembly for QSFP-to-QSFP 40G Ethernet links between Cisco QSFP ports, typically within racks or adjacent racks. Cisco identifies this SKU as the fixed 5-meter passive member of the QSFP-H40G-CU cable set, with a gray pull tab, 26 AWG copper cable, 9 mm QSFP-end cable diameter, and a 50 mm QSFP-end bend radius for BOMs that need a straight 40G copper connection over a measured 5-meter path.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
QSFP-H40G-CU5M |
|
Product type |
40GBASE-CR4 QSFP+ passive direct-attach copper cable |
|
Cable assembly type |
Direct-attach copper cable assembly |
|
Interface role |
QSFP-to-QSFP 40G copper cable |
|
Supported Ethernet rate |
40 Gigabit Ethernet |
|
Cable length |
5 meters |
|
Host interface |
Cisco QSFP 40G port |
|
Pull tab color |
Gray |
|
AWG |
26 |
|
QSFP-end cable diameter |
9 mm |
|
QSFP-end bend radius |
50 mm |
Application Scenarios
Deploy QSFP-H40G-CU5M when two supported Cisco QSFP 40G ports need a passive copper connection and the measured route requires the 5-meter fixed length after cable managers and service slack are included.
This SKU fits projects that keep the 40G link as a straight QSFP-to-QSFP DAC. It should not be substituted with QSFP-4SFP10G-CU5M when the design does not call for a four-port 10G breakout.
Warehouse and staging teams can identify QSFP-H40G-CU5M by the 5-meter Cisco label and gray pull tab. The 26 AWG construction and 9 mm QSFP-end diameter also distinguish it from shorter passive copper lengths in the same family.
Product Comparison
|
Parameter |
QSFP-H40G-CU5M |
QSFP-H40G-CU3M |
QSFP-H40G-ACU7M |
QSFP-4SFP10G-CU5M |
|---|---|---|---|---|
|
Product type |
40GBASE-CR4 QSFP+ passive direct-attach copper cable |
40GBASE-CR4 QSFP+ passive direct-attach copper cable |
40GBASE-CR4 QSFP+ active direct-attach copper cable |
40GBASE-CR4 QSFP+ to 4x10GBASE-CU SFP+ passive direct-attach copper cable |
|
Interface role |
QSFP-to-QSFP 40G copper cable |
QSFP-to-QSFP 40G copper cable |
QSFP-to-QSFP 40G copper cable |
QSFP-to-four-SFP+ 40G breakout copper cable |
|
Cable assembly type |
Direct-attach copper cable assembly |
Direct-attach copper cable assembly |
Active direct-attach copper cable assembly |
Direct-attach copper breakout cable assembly |
|
Supported Ethernet rate |
40 Gigabit Ethernet |
40 Gigabit Ethernet |
40 Gigabit Ethernet |
40G to four 10G copper lanes |
|
Cable length |
5 meters |
3 meters |
7 meters |
5 meters |
|
Pull tab color |
Gray |
Orange |
Blue |
Gray |
|
AWG |
26 |
30 |
26 |
26 |
|
QSFP-end cable diameter |
9 mm |
7 mm |
9 mm |
9 mm |
|
QSFP-end bend radius |
50 mm |
50 mm |
50 mm |
50 mm |
|
QSFP-end face plate distance |
100 mm |
100 mm |
100 mm |
100 mm |
|
Jacket material |
PVC |
PVC |
PVC |
PVC |
|
Jacket color |
Black |
Black |
Black |
Black |
- In a QSFP-H40G-CU5M vs QSFP-H40G-CU3M comparison, the confirmed difference is length and cable gauge: QSFP-H40G-CU5M is the 5-meter 26 AWG passive copper option while QSFP-H40G-CU3M is the 3-meter 30 AWG option.
- The QSFP-H40G-CU5M difference from QSFP-H40G-ACU7M is passive versus active copper at different lengths, with QSFP-H40G-ACU7M listed as a 7-meter active direct-attach cable.
- QSFP-H40G-CU5M vs QSFP-4SFP10G-CU5M is a link-role comparison: QSFP-H40G-CU5M keeps a QSFP-to-QSFP 40G path, while QSFP-4SFP10G-CU5M fans one QSFP end out to four SFP+ copper ends.
- For which model to choose, match the order to the required 40G link role first, then confirm length, passive or active copper type, and Cisco host support.
Selection Guide
1. Choose it for a measured 5-meter passive copper path
Select QSFP-H40G-CU5M when the bill of materials requires a Cisco 40G QSFP-to-QSFP passive copper cable and the installed path needs the documented 5-meter length.
2. Stay with QSFP-H40G-CU3M for shorter runs
Use QSFP-H40G-CU3M when the same passive QSFP-to-QSFP link can be dressed within 3 meters. The shorter cable keeps the same 50 mm QSFP-end bend radius but uses a 30 AWG cable instead of 26 AWG.
3. Move to active copper only for the 7-meter role
Choose QSFP-H40G-ACU7M only when the design calls for Cisco’s active 7-meter QSFP-to-QSFP copper assembly rather than the 5-meter passive cable.
4. Use breakout copper only when four SFP+ ends are required
Order QSFP-4SFP10G-CU5M instead of QSFP-H40G-CU5M only when the link must break one 40G QSFP port out to four 10G SFP+ copper interfaces.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Cable length |
Fixed 5-meter copper route with service slack |
Confirms the installed path can be dressed without forcing a shorter or active cable family |
|
Interface role |
QSFP-to-QSFP 40G direct-attach copper cable |
Separates this SKU from QSFP-to-four-SFP+ breakout designs |
|
Host compatibility |
Cisco platform, line card, port type, and software support in Cisco compatibility documentation |
Keeps the order tied to a supported Cisco QSFP 40G port |
|
Physical routing |
26 AWG cable with 9 mm QSFP-end diameter and 50 mm bend radius |
Helps installers reserve enough space in dense front-panel cable paths |
|
Receiving details |
Gray pull tab and Cisco 5-meter DAC label |
Catches accidental replacement with another Cisco 40G copper length |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | QSFP-H40G-CU5M | Product type | 40GBASE-CR4 QSFP+ passive direct-attach copper cable |
| Ordering description | Cisco 40GBASE-CR4 QSFP+ passive direct-attach copper transceiver module assembly, 5 meter | Cable assembly type | Direct-attach copper cable assembly |
| Interface role | QSFP-to-QSFP 40G copper cable | Supported Ethernet rate | 40 Gigabit Ethernet |
| Cable length | 5 meters | Host interface | Cisco QSFP 40G port |
| Pull tab color | Gray | AWG | 26 |
| QSFP-end cable diameter | 9 mm | QSFP-end bend radius | 50 mm |
| QSFP-end face plate distance | 100 mm | Jacket material | PVC |
| Jacket color | Black | QSFP connector module dimensions | 13.5 x 18.4 x 72.4 mm maximum outer dimensions |
| QSFP connector module weight | 100 grams or less | Commercial operating temperature | 0 to 70 degrees C |
| Storage temperature range | -40 to 85 degrees C | Standards references | IEEE 802.3ba and QSFP+ MSA SFF-8436 |
| Copper cable jacket safety | UL E116441 compliant | Copper cable electrical safety | ELV compliant |
| Compatibility reference | Cisco 40-Gigabit Ethernet Transceiver Modules Compatibility Matrix | Standard warranty | 5 years |
Get More Information
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Questions & Answers
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What is QSFP-H40G-CU5M?
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Where does QSFP-H40G-CU5M fit in data-center cabling?
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Can QSFP-H40G-CU5M replace 40G SR optics?
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What platform check matters for QSFP-H40G-CU5M?
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Does QSFP-H40G-CU5M split into four 10G links?
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What handling issue affects QSFP-H40G-CU5M?
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Why do QSFP-H40G-CU5M links stay down?
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How is QSFP-H40G-CU5M different from AOC?
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