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400G OSFP to QSFP-DD Direct Attach Copper Cable (DAC)
Categories:
Product Highlights:
- 400G OSFP to QSFP-DD direct connection
- Passive copper construction
- 56G PAM4 per channel
- Up to 3m reach
- Low power and low latency
- CMIS 4.0 and MSA compliant
- Ideal for high-density 400G data centers
Table of Contents
Description
The 400G OSFP to QSFP-DD Direct Attach Copper Cable (DAC) is a passive copper interconnect designed to provide direct 400G connectivity between equipment using OSFP and QSFP-DD interfaces. Supporting 56G PAM4 electrical signaling per channel, it offers a cost-effective and power-efficient solution for short-distance connections between 400G switches, servers, network adapters, and other high-density Ethernet equipment. With link lengths of up to 3m, the cable is optimized for in-rack and adjacent-rack data center deployments where low latency, low power consumption, and reliable signal integrity are required. CMIS 4.0, OSFP MSA, and QSFP-DD MSA compliance, along with hot-pluggable interfaces and I2C-based management, supports straightforward deployment and device monitoring.
Specification
| Data Rate | 400Gbps |
|---|---|
| Connector Configuration | OSFP to QSFP-DD |
| Electrical Signaling | 56G PAM4 per channel |
| Maximum Link Length | Up to 3m |
| Management Interface | I2C two-wire interface |
| Hot-Pluggable | Yes |
| Crosstalk | Low crosstalk design |
| Power Consumption | Low power |
| Standards / MSA | CMIS 4.0, OSFP MSA, QSFP-DD MSA |
| Ethernet Compliance | IEEE 802.3cd |
| Cable Type | Direct Attach Copper |
| Application Distance | Short-distance interconnects |
| Compliance | RoHS |
Features
- 400G OSFP to 400G QSFP-DD connectivity
- Passive direct attach copper design
- 56G PAM4 electrical signaling per channel
- Up to 400Gbps aggregate data rate
- Up to 3m transmission distance
- Low power consumption
- Low crosstalk
- Hot-pluggable OSFP and QSFP-DD interfaces
- I2C-based management
- CMIS 4.0 compliant
- OSFP MSA compliant
- QSFP-DD MSA compliant
- Designed for short-distance data center connectivity
Applications
- 400G Ethernet switch interconnects
- OSFP-to-QSFP-DD port connections
- Switch-to-switch connectivity
- Switch-to-server connections
- Server-to-network adapter connections
- In-rack data center connections
- Adjacent-rack interconnects
- High-density 400G data center networks
FAQ
What is the purpose of the OSFP-to-QSFP-DD configuration?
The cable provides direct 400G connectivity between equipment using different 400G pluggable form factors, allowing an OSFP port to connect directly to a QSFP-DD port.
Is this DAC active or passive?
It is a passive Direct Attach Copper Cable, making it suitable for short-distance connections with low power consumption and low latency.
What is the maximum cable length?
The cable supports link lengths of up to 3 meters, making it primarily suitable for in-rack and adjacent-rack data center connections.
What signaling technology does it use?
The cable supports 56G PAM4 electrical signaling per channel for high-speed 400G connectivity.
Is the cable compatible with both OSFP and QSFP-DD management standards?
Yes. The cable supports CMIS 4.0 and is designed in accordance with the OSFP MSA and QSFP-DD MSA specifications for compatible device management and operation.
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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