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400G QSFP-DD to 4×QSFP56 Direct Attach Copper Cable (DAC), PAM4
Categories:
Product Highlights:
- 400G QSFP-DD to 4×100G QSFP56 breakout
- PAM4 high-speed electrical signaling
- Passive copper architecture
- Low power consumption
- 28 AWG and 30 AWG options
- Optimized for low loss and low crosstalk
- Ideal for high-density 400G data centers
Table of Contents
Description
The 400G QSFP-DD to 4×QSFP56 Direct Attach Copper Cable (DAC) is a high-density passive copper breakout interconnect designed to connect one 400G QSFP-DD port to four independent 100G QSFP56 ports. Using PAM4 signaling, it provides a cost-effective, low-power solution for connecting 400G network equipment with multiple 100G interfaces without requiring separate optical transceivers or fiber cabling for short-distance connections. Its optimized copper construction helps minimize insertion loss and crosstalk to maintain reliable high-speed signal transmission. Available in 28 AWG and 30 AWG configurations, the cable provides flexible installation options for high-density data center architectures and can be supplied in straight-through or breakout configurations.
Specification
| Data Rate | 400Gbps |
|---|---|
| Signaling | PAM4 |
| Connector Configuration | QSFP-DD to 4×QSFP56 |
| Breakout Configuration | 400G to 4×100G |
| Cable Gauge | 28AWG / 30AWG |
| Cable Configuration | Straight-through / Breakout |
| Compatibility | IEEE 802.3bj, IEEE 802.3cd |
| Signal Integrity | Optimized for reduced insertion loss and crosstalk |
| Latch Design | Pull-to-release slide latch |
| EMI Control | Customized cable braid termination |
| EEPROM | Customizable EEPROM mapping |
| Power Supply | Single 3.3V |
| Operating Temperature | 0°C to +70°C |
| Compliance | RoHS |
Features
- 400G QSFP-DD to 4×100G QSFP56 breakout configuration
- Up to 400Gbps aggregate bandwidth
- Four independent 100G QSFP56 connections
- PAM4 electrical signaling
- Passive Direct Attach Copper design
- Low power consumption
- Optimized for low insertion loss and crosstalk
- Available in 28 AWG and 30 AWG
- Straight-through and breakout configurations
- High-density cable design
- No separate optical transceivers required
- Designed for short-distance connectivity
Applications
- 400G to 4×100G Ethernet breakout
- Data center networks
- 400G switch port breakout
- Switch-to-switch connections
- Switch-to-server connectivity
- High-performance computing
- High-density rack interconnects
- 400G network migration and expansion
- Short-distance 400G-to-100G connectivity
FAQ
What is the breakout configuration?
The cable connects one 400G QSFP-DD interface to four independent 100G QSFP56 interfaces, allowing a single 400G port to connect directly with four 100G network devices.
Is this cable passive?
Yes. It is a passive Direct Attach Copper Cable that provides low-power electrical connectivity for short-distance applications.
What signaling technology does it use?
The cable uses PAM4 electrical signaling to support high-speed 400G-to-100G connectivity.
What cable gauges are available?
The cable is available in 28 AWG and 30 AWG configurations, providing flexibility for different cable-management and rack-density requirements.
What are the advantages over separate transceivers and fiber cables?
The integrated copper design reduces the number of components required for short-distance connections, helping lower power consumption, simplify installation, and reduce overall connectivity cost.
Featured DACs & AOCs Comparison Guide
| SKU | Cable Type | Data Rate | Form Factor A | Form Factor B | Wire Type | Length |
| AOC-100GQSFP28-5 | AOC | 100G | QSFP28 | QSFP28 | OM4 Fiber Cable | 5M |
| AOC-10GSFP-10 | AOC | 10G | SFP+ | SFP+ | OM4 Fiber Cable | 10M |
| AOC-25GSFP28-3 | AOC | 25G | SFP28 | SFP28 | OM4 Fiber Cable | 3M |
| AOC-40GQSFP-10 | AOC | 40G | QSFP+ | QSFP+ | OM3 Fiber Cable | 10M |
| AOC-QSFP-10G4SFP-5 | AOC | 40G | QSFP+ | 4*SFP+ | OM3 Fiber Cable | 5M |
| AOC-QSFP28-4SFP28-3 | AOC | 100G | QSFP28 | 4×SFP28 | OM3 Fiber Cable | 3M |
| DAC-100GQSFP28-25G4SFP28-P5 | DAC | 100G | QSFP28 | 4×SFP28 | 24AWG | 5M |
| DAC-100GQSFP28-P3 | DAC | 100G | QSFP28 | QSFP28 | 26AWG | 3M |
| DAC-10GCX4-P05 | DAC | 10G | CX4 | CX4 | 28AWG | 3M |
| DAC-10GSFP-P10 | DAC | 10G | SFP+ | SFP+ | 24AWG | 10M |
| DAC-400GQSFP-P5 | DAC | 400G | QSFP-DD | QSFP-DD | 30AWG | 5M |
| DAC-40GQSFP-P07 | DAC | 40G | QSFP+ | QSFP+ | 28AWG | 7M |
| DAC-QSFP-10G4SFP-P03 | DAC | 40G | QSFP+ | 4 * SFP+ | 30AWG | 3M |
| DAC-SFP-P05 | DAC | 1.25G | SFP | SFP | 30AWG | 5M |
Quality Qulifications and Compliance
To get the detailed certification, please go to the Compliance.
Please Note: Our products comply with all internationally recognized and industry-standard specifications. For customized or special requirement products, we carry out testing and standards in accordance with the conformity criteria specified in the contract.
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