ENET E40G-QSFP-QSFP-P-00501-ENC 40GBASE-CR4 QSFP+ Direct Attach Cable
The ENET E40G-QSFP-QSFP-P-00501-ENC is a Ruckus (formerly Brocade) compatible 40GBASE-CR4 QSFP+ direct attach cable engineered for high-speed 40Gb/s interconnects in demanding data center and networking environments. This passive 0.5-meter copper DAC delivers a cost-effective, low-power solution for short-reach 40G applications, eliminating the need for active electronics while maintaining reliable signal integrity. Ideal for IT professionals, network engineers, and data center operators seeking dependable QSFP+ direct attach cables that reduce latency and operational costs.
Key Features
- 40GBASE-CR4 compliant passive copper construction for reliable 40Gb/s performance
- QSFP+ to QSFP+ connectivity — direct attach design eliminates transceiver modules
- 0.5-meter length optimized for short-reach data center rack and switch interconnections
- Ruckus and Brocade switch compatibility — seamless integration with existing infrastructure
- Low-power passive technology — no active components, reduced power consumption and heat generation
- Cost-effective alternative to active optical cables and transceiver-based solutions
- Durable copper construction with robust connector design for high-cycle mating
Technical Specifications
| Specification |
Details |
| Manufacturer |
ENET Solutions |
| Part Number |
E40G-QSFP-QSFP-P-00501-ENC |
| Cable Type |
40GBASE-CR4 Passive Copper Direct Attach Cable (DAC) |
| Connector Type |
QSFP+ to QSFP+ |
| Cable Length |
0.5 Meters |
| Data Rate |
40 Gigabits per Second (40Gb/s) |
| Compatibility |
Ruckus, Brocade, and standard QSFP+ port equipment |
| Power Consumption |
Passive — no power required |
| Operating Temperature |
0°C to 70°C |
| Storage Temperature |
-40°C to 85°C |
Frequently Asked Questions
What is a 40GBASE-CR4 QSFP+ direct attach cable used for?
A 40GBASE-CR4 QSFP+ direct attach cable connects two QSFP+ ports for 40Gb/s data transmission over short distances (typically under 5 meters). It's commonly used in data centers for switch-to-switch, switch-to-server, and server-to-storage interconnections, providing low-latency, cost-effective connectivity without the need for transceiver modules.
Is the ENET E40G-QSFP-QSFP-P-00501-ENC passive or active?
This cable is passive, meaning it contains no active electronic components. Passive DACs are more affordable, consume no power, generate minimal heat, and are ideal for short-reach applications. The 0.5-meter length is well within passive cable specifications for reliable 40Gb/s performance.
Will this QSFP+ direct attach cable work with Ruckus and Brocade switches?
Yes. The ENET E40G-QSFP-QSFP-P-00501-ENC is specifically designed for compatibility with Ruckus (formerly Brocade) networking equipment. It also works with any standard QSFP+ port that supports 40GBASE-CR4 signaling, making it a versatile choice for mixed-vendor data center environments.
What are the advantages of a passive copper DAC over active optical cables?
Passive copper direct attach cables offer lower cost, zero power consumption, no heat generation, and simpler troubleshooting compared to active optical cables. For short distances (0.5M–5M), passive DACs deliver identical performance at a fraction of the price, making them the preferred choice for dense data center deployments.
