Cisco Compatible QSFP-H40G-CU4M Twinax Cable | 40G QSFP+ Direct Attach Copper, 4 Meter
Product Overview
The Cisco Compatible QSFP-H40G-CU4M Twinax Cable is a high-performance 40Gbps QSFP+ Direct Attach Copper (DAC) cable designed for short- to mid-range connectivity in modern data centers and enterprise networks. With a cable length of 4 meters, it provides extended reach compared to standard short DAC cables, making it ideal for inter-rack connections while maintaining low latency and cost efficiency.
This model is typically available in active Twinax design to ensure stable signal integrity over longer distances. Fully compatible with Cisco networking equipment, it delivers reliable performance and seamless integration in high-density environments.
Key Features
- Supports 40Gbps data rate (4×10G lanes)
- Active Twinax copper cable for extended reach
- Low latency with stable signal integrity
- Fully compatible with Cisco QSFP+ interfaces
- Hot-pluggable QSFP+ connectors
- Plug-and-play installation
- Cost-effective alternative to optical solutions
- 100% tested for compatibility and performance
Technical Specifications
General Parameters
- Product Type: Direct Attach Copper (DAC) Cable
- Form Factor: QSFP+ to QSFP+
- Data Rate: 40Gbps (4×10Gbps)
- Cable Type: Active Twinax Copper
Electrical Characteristics
- Integrated signal conditioning (active design)
- Stable transmission over extended distance
Mechanical Specifications
- Jacket Material: PVC / LSZH (optional)
- Bend Radius: Standard DAC compliance
Environmental
- Operating Temperature: 0°C to 70°C
- Storage Temperature: -40°C to 85°C
Compliance
- Fully compatible with Cisco platforms
Applications
- Inter-rack connections in data centers
- Top-of-Rack (ToR) to End-of-Row (EoR) switching
- Switch-to-switch 40G interconnects
- Server and storage connectivity
- Enterprise network infrastructure
Why Choose This Product
The Cisco-compatible QSFP-H40G-CU4M DAC cable provides an excellent balance between reach, performance, and cost. Compared to shorter passive DAC cables, it offers:
- Extended reach up to 4 meters
- Improved signal stability with active design
- Lower cost than optical transceivers
- Reduced power consumption compared to fiber solutions
It is an ideal solution for data centers that require longer short-range connections without moving to optical modules.
When to Choose This Cable
Choose QSFP-H40G-CU4M if:
✔ Distance is within 4 meters
✔ Connecting devices across racks
✔ Need better reach than passive DAC
✔ Want to optimize cost vs performance
Choose optical solutions if:
✔ Distance exceeds 5–7 meters
✔ Flexible routing or structured cabling is needed
✔ Long-distance scalability is required
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