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5m passive copper cable offers reliable 40G connectivity. Minimal signal loss over distance.
QSFP-H40G-CU5M
40GBASE-CR4 Passive Copper Cable, 5m
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Name:
QSFP-H40G-CU5M
- Description:
- 40GBASE-CR4 Passive Copper Cable, 5m
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 819814015434
- Condition:
- Warranty:
- 3
- List Price:
$442.00
- Price:
$97.0078.1% off
Quantity:
1
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QSFP-H40G-CU5M Overview
QSFP-H40G-CU5M is a QSFP cable assembly designed for 40G data rate applications, providing a passive direct-attach copper (DAC) connection for short-range transmission in data centers and enterprise networks. It supports Ethernet protocols and offers a reliable, cost-effective alternative to optical modules for high-bandwidth interconnects.
QSFP-H40G-CU5M conforms to the QSFP form factor with dimensions specified in its datasheet, making it ideal for high-density port environments. Its integrated design and robust performance meet the demands of modern telecom and enterprise infrastructures while ensuring compatibility with industry-leading vendors.
QSFP-H40G-CU5M price is $97.00, a 78.1% saving from the Cisco list price of $442.00. QSFP-H40G-CU5M is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-H40G-CU5M for additional pricing. Browse the full 40G Base Modules series or explore all Cisco products.
QSFP-H40G-CU5M Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- N/A
- Wavelength
- N/A
- Transmission Distance
- Short-Range
- Fiber Type
- N/A
- Max Distance
- 5 meters
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- N/A
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Product Name
- QSFP-H40G-CU5M
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
QSFP-H40G-CU5M Use Case
High-Density Top-of-Rack 40GbE Switch Interconnect
In large-scale data centers, network architects deploy QSFP-H40G-CU5M-40GBASE-CR4 Passive Copper Cable, 5m to connect leaf and spine switches within server racks. This solution delivers cost-effective, low-power 40GbE links with minimal signal loss, streamlining cable management and boosting rack-level throughput by up to 40 Gbps per port.
High-Performance Computing Cluster Node Link
Research institutions leverage QSFP-H40G-CU5M-40GBASE-CR4 Passive Copper Cable, 5m for direct 40GbE connections between HPC compute nodes. The passive copper design ensures ultra-low latency and high reliability under heavy data loads, accelerating parallel workloads and enhancing cluster efficiency while reducing overall TCO.
Ultra-Low-Latency Financial Trading Network Upgrade
Financial firms upgrade their trading floors with QSFP-H40G-CU5M-40GBASE-CR4 Passive Copper Cable, 5m to link matching engines and market data feeds. The cable’s zero-polarity design and stable 40 Gbps channels minimize jitter and latency, ensuring compliant, real-time trade execution and improved market responsiveness.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 QSFP-H40G-CU5M |  QSFP-H40G-AOC10M |  WSP-Q40GLR4L= |  QSFP-40G-SR4-S |  QSFP-4X10G-LR-S= | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | N/A | Integrated Active Optical Cable | LC | MPO | LC |
| Data Rate | 40G | 40G | 40G | 40G | 10G |
| Depth | N/A | N/A | 0.30 inches | N/A | 0.85 inches |
| Fiber Type | N/A | N/A | Single-mode | Multi-mode | Single-mode |
| Form Factor | QSFP | QSFP+ | QSFP+ | QSFP | QSFP |
| Height | N/A | N/A | 0.75 inches | N/A | 0.27 inches |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 5 meters | 10m | 10 km | 100 meters | 10 km |
| Network Interface | Ethernet | Fiber | Fiber | Ethernet | Ethernet |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | N/A | N/A | 3.5W | 4 W | 3.5 W |
| Product Name | QSFP-H40G-CU5M | QSFP-H40G-AOC10M | WSP-Q40GLR4L= | QSFP-40G-SR4-S | QSFP-4X10G-LR-S= |
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Protocols | Ethernet | Ethernet | Ethernet, Fibre Channel | Ethernet | Ethernet |
| Transmission Distance | Short-Range | Short-Range | Long-Range | Short-Range | Long-Range |
| Wavelength | N/A | N/A | 1310 nm | 850 nm | 1310 nm |
| Weight | N/A | N/A | 0.045 lbs | N/A | 0.10 lbs |
| Width | N/A | N/A | 0.60 inches | N/A | 0.66 inches |
Reviews & Ratings
M
Malcolm Rhodes
5
Easy to deploy, performs well under heavy traffic.
T
Talia Knight
4
Compact and durable. Supports high-density deployments seamlessly.
D
Dante Pierce
5
Reliable short-range solution for 40G network connections.
L
Lydia Vaughn
5
Stable and low-latency performance. Professional-grade quality.
Questions & Answers
What is the QSFP-H40G-CU5M cable?
The QSFP-H40G-CU5M is a 5 meter, 40GBASE-CR4 passive copper cable designed for short-reach 40 GbE interconnects between QSFP+ ports.
Which data rates does the QSFP-H40G-CU5M support?
It supports 40 Gb/s aggregated data rates over four parallel 10 Gb/s lanes, fully compliant with IEEE 802.3ba specifications.
Is the QSFP-H40G-CU5M compatible with my switch or router?
Yes, it is interoperable with QSFP+ copper ports from leading vendors including Cisco, Juniper, Arista, Mellanox and HP.
What are the benefits of using a passive copper cable?
Passive copper cables offer low latency, low power consumption, and a lower total cost of ownership compared to active optical modules for short-reach links.
Can I hot-swap the QSFP-H40G-CU5M cable?
Yes, it supports hot-plug insertion and removal without shutting down connected equipment, ensuring uninterrupted data center operations.
What environments are suitable for the QSFP-H40G-CU5M?
It is optimized for data center, enterprise backbone, and high-performance computing environments requiring high-density 40 GbE interconnects.
How do I install the QSFP-H40G-CU5M cable?
Align the two QSFP+ connectors with the device ports, insert firmly until the latch engages, and verify link status via your network management interface.
What is the maximum operating temperature?
The cable is rated for an operating temperature range of 0 °C to 70 °C (32 °F to 158 °F) per IEEE standards.
Does the QSFP-H40G-CU5M require external power?
No, as a passive copper cable, it draws power directly from the QSFP+ host transceivers, eliminating the need for external power supplies.
How does the QSFP-H40G-CU5M differ from active copper cables?
Unlike active cables with integrated electronics for signal conditioning, this passive cable relies on host transceiver capabilities, offering cost and power savings for distances up to 7 m.
What warranty covers the QSFP-H40G-CU5M?
It includes a limited lifetime warranty covering manufacturing defects and performance compliance as long as the original purchaser owns the cable.
Can the QSFP-H40G-CU5M support breakout configurations?
No, this cable is designed for direct 40 GbE to 40 GbE connections and does not support 4×10 GbE breakout modes.
What is the insertion loss specification?
The cable meets IEEE 40GBASE-CR4 insertion loss requirements with a maximum channel loss of 9 dB at 10 GHz for a 5 meter length.
How do I verify the cable’s authenticity?
Check the manufacturer’s label for the QSFP-H40G-CU5M SKU and scan the accompanying QR code to confirm OEM certification.
What diagnostics features are available?
It supports digital optical monitoring (DOM) via the QSFP+ host, providing real-time link status, temperature and voltage readings.
Is the cable RoHS compliant?
Yes, the QSFP-H40G-CU5M meets RoHS and REACH environmental standards, ensuring it is free from hazardous substances.