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Reliable breakout cable for 4x10G deployments.
QSFP-4SFP10G-CU4M=
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4M CABLE QSFP TO 4XSFP10G PASSIVE COPPER SPLITTER
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Name:
QSFP-4SFP10G-CU4M=
- Description:
- 4M CABLE QSFP TO 4XSFP10G PASSIVE COPPER SPLITTER
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 821455468371
- Condition:
- Warranty:
- 3
- List Price:
$807.76
- Price:
$420.0348% off
Quantity:
1
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QSFP-4SFP10G-CU4M= Overview
QSFP-4SFP10G-CU4M= is a high-performance direct attach copper cable assembly designed to convert a single QSFP+ port into four SFP+ interfaces, each supporting 10G data rates. Engineered for short-range transmission with a fixed 4-meter length, it offers a robust, low-latency solution for data center interconnects, enterprise networks, and high-performance computing environments while supporting standard Ethernet protocols.
QSFP-4SFP10G-CU4M= features a QSFP+ connector on one end and four SFP+ connectors on the other, packaged in a compact form factor that meets the demanding physical and operational requirements of modern network architectures. With its pre-validated design for multi-vendor compatibility, this breakout cable assembly ensures streamlined deployment and reliable performance in diverse telecom and data center applications.
QSFP-4SFP10G-CU4M= price is $420.03, a 48% saving from the Cisco list price of $807.76. QSFP-4SFP10G-CU4M= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-4SFP10G-CU4M= for additional pricing. Browse the full 40G Base Modules series or explore all Cisco products.
QSFP-4SFP10G-CU4M= Specifications
- Power Consumption
- N/A
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Data Rate
- 10G
- Transmission Distance
- Short-Range
- Supported Protocols
- Ethernet
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Wavelength
- N/A
- Fiber Type
- N/A
- Input Voltage
- N/A
- Product Type
- Direct Attach Copper Cable (DAC)
- Form Factor
- QSFP+ to 4x SFP+
- Connector Type
- QSFP+ and SFP+
- Max Distance
- 4 meters
- Network Interface
- Copper
- Product Name
- QSFP-4SFP10G-CU4M=
QSFP-4SFP10G-CU4M= Use Case
Data Center Top-of-Rack Aggregation with QSFP-4SFP10G-CU4M=-4M Passive Copper Splitter Cable
In hyperscale data centers, network architects deploy the QSFP-4SFP10G-CU4M=-4M passive copper splitter to aggregate four 10GbE server uplinks into a single 40GbE switch port. This real-world scenario eliminates the need for expensive optical modules, reduces cable density by 75%, and streamlines port management—delivering full-line rate performance with up to 40Gbps bandwidth and significant CAPEX/OPEX savings.
Ultra-Low Latency Financial Trading Network Interconnect
High-frequency trading firms integrate the QSFP-4SFP10G-CU4M=-4M cable to directly connect four trading servers to a single 40GbE switch uplink. In this mission-critical environment, the passive copper splitter ensures deterministic sub-microsecond latency, built-in port redundancy, and seamless failover. The outcome: accelerated order execution, minimized packet loss, and competitive edge in real-time market operations.
Enterprise Campus Uplink Consolidation and Bandwidth Optimization
Large campus networks use the QSFP-4SFP10G-CU4M=-4M passive copper splitter to merge four 10GbE edge switch uplinks into one 40GbE aggregation port. This deployment simplifies network topology, cuts transceiver costs by up to 60%, and accelerates provisioning for VoIP, video conferencing, and cloud-hosted applications—delivering scalable, high-throughput connectivity with zero configuration changes on existing switches.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QSFP-4SFP10G-CU4M= |  QSFP-4X10G-AOC10M= |  WSP-Q40GLR4L |  QSFP-4X10G-LR-S= |  QSFP-4X10G-AOC1M= | |
|---|---|---|---|---|---|
| Product Type | Direct Attach Copper Cable (DAC) | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP+ to 4x SFP+ | QSFP | QSFP+ | QSFP | QSFP |
| Data Rate | 10G | 40G (4x10G) | 40G | 10G | 40G (4x10G) |
| Connector Type | QSFP+ and SFP+ | Direct Attach | LC | LC | Integrated Fiber-Optic |
| Wavelength | N/A | N/A | 1271/1291/1311/1331 nm | 1310 nm | 850nm |
| Transmission Distance | Short-Range | Short-Range | Long-Range | Long-Range | Short-Range |
| Fiber Type | N/A | N/A | Single-mode | Single-mode | Multi-mode |
| Max Distance | 4 meters | 10 meters | 10 km | 10 km | 1 m |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Copper | Ethernet | Fiber | Ethernet | Fiber |
| Power Consumption | N/A | N/A | 4.8W | 3.5 W | 2.5W |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | N/A | N/A | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista | N/A | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista |
| Product Name | QSFP-4SFP10G-CU4M= | QSFP-4X10G-AOC10M= | WSP-Q40GLR4L | QSFP-4X10G-LR-S= | QSFP-4X10G-AOC1M= |
| Height | N/A | N/A | 0.54 inches | 0.27 inches | N/A |
| Width | N/A | N/A | 0.54 inches | 0.66 inches | N/A |
| Depth | N/A | N/A | 1.8 inches | 0.85 inches | N/A |
| Weight | N/A | N/A | 0.2 lbs | 0.10 lbs | N/A |
Reviews & Ratings
K
Kevin Marshall
4
Stable connections across multiple endpoints.
B
Brian Rogers
5
Works smoothly with Cisco switches.
J
Jason Lopez
4
Good balance of length and flexibility.
M
Mark Anderson
4
Dependable cable for enterprise use.
Questions & Answers
What is the QSFP-4SFP10G-CU4M cable?
The QSFP-4SFP10G-CU4M is a 4-meter passive copper breakout cable that splits one QSFP+ port into four 10 Gbps SFP+ channels.
Which data rates does the QSFP-4SFP10G-CU4M support?
This cable supports an aggregate 40 Gbps bandwidth and delivers 10 Gbps per individual SFP+ link.
What connectors are on the QSFP-4SFP10G-CU4M?
It features a single QSFP+ connector on one end and four SFP+ connectors on the opposite end.
How long is the QSFP-4SFP10G-CU4M cable?
The cable is precisely 4 meters (13.12 feet) in length for optimized rack-to-rack runs.
Is the QSFP-4SFP10G-CU4M an active or passive cable?
It is a fully passive copper splitter and requires no external power or signal amplification.
What applications are ideal for the QSFP-4SFP10G-CU4M?
It is ideal for data center top-of-rack switching, server breakout, and short-reach 40G-to-4×10G migrations.
Is the QSFP-4SFP10G-CU4M compatible with major switch vendors?
Yes, it is vendor-agnostic and compatible with Cisco, Juniper, Arista, Dell, HPE and other QSFP+ and SFP+ ports.
How do I install the QSFP-4SFP10G-CU4M cable?
Simply plug the QSFP+ end into the 40G port and connect the four SFP+ ends to 10G ports—no configuration is required.
What is the maximum reach of the QSFP-4SFP10G-CU4M?
As a passive copper solution, it reliably supports up to its 4 meter length without signal degradation.
Can the QSFP-4SFP10G-CU4M carry 10G Ethernet traffic?
Yes, it transparently transports 10G Ethernet, FCoE, and other SFP+-based protocols over each channel.
Does the QSFP-4SFP10G-CU4M consume power?
No, being a passive copper cable, it draws no electrical power from host systems.
What operating temperatures does the QSFP-4SFP10G-CU4M support?
It is rated for 0 °C to 70 °C (32 °F to 158 °F) ambient operating temperature.
Is the QSFP-4SFP10G-CU4M reusable and hot-swappable?
Yes, it supports hot-plug operation and can be reused across multiple network setups.
Do I need additional transceivers with the QSFP-4SFP10G-CU4M?
No additional transceivers are required; the cable integrates both QSFP+ and SFP+ interfaces.
What advantages does a passive copper splitter offer?
Passive splitters are cost-effective, energy-efficient, and optimal for short-reach breakout applications.
Can the QSFP-4SFP10G-CU4M be used for breakout in virtualization environments?
Yes, it enables flexible bandwidth allocation and efficient server connectivity in virtualized data centers.