This post introduces the QSA Adapter, QSFP28/QSFP+ to SFP28/SFP+ Converter Module.

What is a QSA Adapter?

The QSA Adapter enables a connections between a single lane transceiver or cable and a quad-lane port.

Optech’s converter module provides the option to connect an 25G SFP28 or 10G SFP+ transceiver/cable to a 100G QSFP28 port or 40G QSFP+ port.

QSA Adapter

Features of Optech’s QSA Adapter

Optech’s QSA Adapter can be use as a 100G QSFP28 to 25G QSFP28 Adapter and 40G QSFP+ to 10G SFP+ Adapter.

  • 10G connectivity on 40G infrastructure.
  • 10G/25G connectivity on 100G infrastructure.
  • Low insertion loss
  • Operating case temperature: -20°C to +85°C
  • Single 3.3V power supply
  • RoHS-6 compliant 

Supported Transceivers and Cable by the QSA Adapter

Optech’s QSA accepts a huge range of 10G SFP+ and 25G SFP28 transceivers and cables types:

  • Multimode SR Transceivers
  • Single-mode LR Transceivers
  • Single-mode ER Transceivers
  • Single-mode ZR Transceivers
  • Direct Attach Cables (DAC)
  • Active Optical Cables (AOC)

Why should you use a QSA Adapter?

The QSA Adapter enables a cost-effective migration to 100G Ethernet by providing the flexibility to use lower speed 10G SFP+ or 25G SFP28 transceiver or cable in a QSFP28 or QSFP+ port.

 QSA Adapters are frequently use during the process of upgrading to a 100G network. It provides the option to use any SFP28/SFP+ transceiver or cable to connect to a lower-speed port on the older equipment.

Ordering Inforamtion

To order or ask more information about Optech’s QSA adapter for converting SFP+/SFP28 to QSFP+/QSFP28 contact us at

About Optech Technology

Optech Technology Co. Ltd was founded in 2001 in Taipei, Taiwan. The company was created with a sole purpose, to provide a wide and high quality portfolio of optical products to a very demanding and fast evolving market.

To respond to the permanent increase of IP traffic, Optech portfolio is constantly growing. Since the beginning, the company has always been up to date with the latest innovations on the market. Today, we are proud to deliver a large selection of 25G SFP28, 40G QSFP+, 100G QSFP28, 200G QSFP56, 400G QSFP-DD and 800G QSFP-DD optical transceivers and cables.

Optech has a large portfolio of products which include optical transceiversdirect attach cablesactive optical cablesloopback transceiversmedia converters and fiber patch cords.

Through its large selection of optical products, that have a range of data speed from 155 Mbps to 800 Gbps and reach distances up to 120km, Optech products are suitable for various industries such as telecom, data centers as well as public and private networks. 

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