QSFP-H40G-ACU10M – 40G QSFP+ Active Copper – 10m Length – Direct-Attach Cable
Why Layer23-Switch
Stocked, Shipped and Supported by One Team
Ships in 1 Business Day
In-stock orders leave our Hong Kong or U.S. warehouse within 1 business day after payment, with tracking by email.
LSCare Warranty
3years on enterprise equipment
Free CCIE Support
Certified engineers help before and after you buy. Reply within 1 business day by email or live chat.
Verify Before You Pay
100%factory-sealed
Get label and serial photos before shipment, and check every serial number with Cisco.
QSFP-H40G-ACU10M Description
The QSFP-H40G-ACU10M is a Cisco 40GBASE-CR4 QSFP+ active copper direct-attach cable for 40G links between neighboring cabinets in a rack row. The 10-meter cable uses 26 AWG conductors with a 9 mm QSFP-end diameter and a 50 mm bend radius, draws 1.5W at each end and operates from 0 to 70 degrees C. Active electronics are what let a copper assembly reach 10 meters, where passive 40G copper cables stop at 5 meters.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
QSFP-H40G-ACU10M |
|
Product type |
40GBASE-CR4 QSFP+ direct-attach copper cable |
|
Interface form factor |
QSFP+ to QSFP+ direct attach |
|
Data rate |
40 Gigabit Ethernet |
|
Cable standard |
40GBASE-CR4 |
|
Cable length |
10 meters |
|
Cable electronics |
Active |
|
Pull tab color |
Red |
|
Cable AWG |
26 AWG |
|
QSFP-end cable diameter |
9 mm |
|
QSFP-end bend radius |
50 mm |
|
Power consumption, per QSFP end |
1.5 W |
|
Operating temperature |
0 to 70 C |
Application Scenarios
Two cabinets in neighboring racks can join their 40G QSFP+ ports with one 10-meter copper assembly, which avoids separate optics and fiber for a link that stays inside the row.
A platform that offers only SFP+ ports can take the cable through a CVR-4SFP10G-QSFP reverse adapter, which lists the cable as a supported QSFP+ module.
Product Comparison
|
Parameter |
QSFP-H40G-ACU10M |
QSFP-H40G-ACU7M | |
|---|---|---|---|
|
Cable standard |
40GBASE-CR4 |
40GBASE-CR4 |
40GBASE-CR4 |
|
Cable length |
10 meters |
7 meters |
5 meters |
|
Cable electronics |
Active |
Active |
Passive |
|
QSFP-end cable diameter |
9 mm |
9 mm |
9 mm |
|
QSFP-end bend radius |
50 mm |
50 mm |
50 mm |
|
Operating temperature |
0 to 70°C |
0 to 70°C |
0 to 70°C |
QSFP-H40G-ACU10M is one of two active copper 40GBASE-CR4 cables in this group and the longest copper option, since QSFP-H40G-ACU7M stops at 7 meters and passive QSFP-H40G-CU5M at 5 meters. Runs of 5 meters or less fit QSFP-H40G-CU5M, and runs of 7 meters or less fit QSFP-H40G-ACU7M, all three with a 9 mm QSFP-end diameter and 50 mm bend radius. Where 10 meters is needed but a thinner cable is wanted for airflow, QSFP-H40G-AOC10M is the optical cable of the same length at 3.5 mm. Runs beyond 10 meters move to QSFP-H40G-AOC15M, because Cisco lists no copper cable longer than 10 meters.
Ordering Checklist
- Host support: Confirm the 40G QSFP port on the host and the far-end ports for QSFP-H40G-ACU10M appear in Cisco’s Optics-to-Device Compatibility Matrix (tmgmatrix.cisco.com). Platform support is listed in that matrix, not in the cable data sheet.
- Platforms with SFP+ ports only: Add the CVR-4SFP10G-QSFP reverse adapter, which lists QSFP-H40G-ACU10M as a supported QSFP+ module; CVR-TRAY-8 or CVR-BRKT-1 holds the adapters. A cable with QSFP+ ends has no port to plug into on a platform that offers only SFP+ ports.
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | QSFP-H40G-ACU10M | Product type | 40GBASE-CR4 QSFP+ direct-attach copper cable |
| Interface form factor | QSFP+ to QSFP+ direct attach | Data rate | 40 Gigabit Ethernet |
| Cable standard | 40GBASE-CR4 | Cable length | 10 meters |
| Cable electronics | Active | Pull tab color | Red |
| Cable AWG | 26 AWG | 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 |
| Power consumption, per QSFP end | 1.5 W | Latency, per link | Less than 0.1 microsecond |
| Operating temperature | 0 to 70 C | Storage temperature | -40 to 85 C |
| Standards reference | IEEE 802.3ba and QSFP MSA SFF-8436 | Compatibility reference | Cisco 40-Gigabit Ethernet Transceiver Modules Compatibility Matrix |
Quality Certifications
Customer Reviews
Questions & Answers
-
How long is QSFP-H40G-ACU10M?
-
What operating temperature range does QSFP-H40G-ACU10M support?
-
How long is QSFP-H40G-ACU10M in feet?
-
What latency does a QSFP-H40G-ACU10M link add?
-
What storage temperature range applies to QSFP-H40G-ACU10M?
-
How much face plate distance does QSFP-H40G-ACU10M need?
Warranty
Layer23-Switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
All items are brand new, original, and factory-sealed.
Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly. Visit Return Policy page for more information.
We support multiple secure payment and logistics options, backed by industry-leading verification:












Visit How to Pay page for more information
Extended, Worry-Free Warranty Coverage Factory New Sealed Enterprise Hardware:
· 3 Years Factory New Sealed
Visit Warranty Policy page for more information
Verify, plan, and comparewith confidence
Use practical tools to check device details, review lifecyclemilestones, and compare hardware before you buy.

Logistics handling was smooth from warehouse to our door.
Every interaction with Layer23 has been positive. They’ve earned my repeat business.
Confidence in this purchase grew with every step of the process.