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100G QSFP28 to 25G SFP28 Adapter Module (QSA)
Categories:
Product Highlights:
- QSFP28-to-SFP28 interface adaptation
- Up to 25Gbps single-channel operation
- Supports 25G, 10G, and 5G where supported
- Compatible with SFP28 transceivers, DACs, and AOCs
- 100-ohm controlled differential impedance
- Zinc-alloy EMI-shielded housing
- Compact plug-and-play design
Table of Contents
Description
The 100G QSFP28 to 25G SFP28 Adapter Module (QSA) is a compact adapter designed to enable a 25G SFP28 transceiver, DAC, or AOC to be used through a compatible QSFP28 port. It provides one independent 25Gbps duplex channel while supporting 10Gbps and 5Gbps operation where supported by the host equipment. Featuring a zinc-alloy metal housing for EMI shielding, controlled 100-ohm differential impedance, low insertion loss, and low crosstalk, the adapter helps maintain reliable high-speed signal transmission. Its plug-and-play design provides a practical option for data center, enterprise, and high-density network deployments that require flexible connectivity between QSFP28-based equipment and SFP28 devices.
Specification
| Host Interface | QSFP28 |
|---|---|
| Device Interface | SFP28 |
| Maximum Supported Data Rate | 25Gbps |
| Additional Supported Rates | 10Gbps, 5Gbps |
| Channel Configuration | 1 Independent Duplex Channel |
| Application | 100G QSFP28 to 25G SFP28 Connectivity |
| QSFP28 Compliance | SFF-8665 |
| SFP28 Compliance | SFF-8432 |
| Electrical Impedance | 100Ω Differential |
| Power Supply | #ERROR! |
| External Power | Not Required |
| Signal Integrity | Optimized High-Speed Electrical Path |
| Pair-to-Pair Skew | Minimized |
| Insertion Loss | Low |
| Crosstalk | Low |
| EMI Protection | All-Metal Housing |
| Housing Material | Zinc Alloy |
| Insert Material | Flame-Retardant PC110 |
| PCB Material | FR-4, T=1.2mm |
Features
- Converts a compatible QSFP28 port to an SFP28 interface
- Supports one independent 25Gbps duplex channel
- Supports 10Gbps and 5Gbps data rates where supported by the host
- Compatible with SFP28 transceivers, DACs, and AOCs
- Controlled 100-ohm differential impedance for signal integrity
- Low insertion loss and low crosstalk
- Zinc-alloy metal housing for effective EMI shielding
- Compact, plug-and-play design
- Suitable for high-density network environments
Applications
- 25G server-to-switch connectivity
- Data center network upgrades
- 100G-to-25G network migration
- Enterprise network infrastructure
- High-performance computing (HPC) networks
- QSFP28 switch and router port adaptation
- High-density rack and server connectivity
Q&A
Can a 25G SFP28 module be used in a QSFP28 port?
Yes. The QSA is designed to allow a compatible 25G SFP28 transceiver, DAC, or AOC to connect through a QSFP28 port. Compatibility depends on the specific network equipment and its port configuration.
What data rates does the QSA support?
The adapter supports one independent duplex channel at up to 25Gbps. 10Gbps and 5Gbps operation may also be supported when enabled by the host equipment.
Does the QSA convert 100G data into 25G data?
The QSA is primarily a physical interface adapter rather than an active protocol or speed converter. It provides the electrical interface needed to use a compatible SFP28 device through a QSFP28 port, with actual operating speed determined by the host equipment and connected device.
What devices can be connected through the QSA?
It can be used with compatible 25G SFP28 optical transceivers, DACs, and AOCs, making it suitable for connecting servers, switches, routers, and other network equipment with compatible interfaces.
Is the QSA suitable for high-density deployments?
Yes. Its compact form factor, metal EMI-shielded housing, and controlled high-speed electrical design make it suitable for data centers and other high-density networking environments.
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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