100GBASE-SR4 QSFP28 850nm 100m DOM MPO-12/UPC MMF Optical Transceiver Module, Breakout to 4 x 25G-SR

100GBASE-SR4 QSFP28 100m

PN: CT-QSFP28-SR4

100G QSFP28 SR4 850NM 100M MPO Parallel QSFP28 SR4 transceiver for 100G Ethernet over multimode fiber up to 100 m (OM4), featuring 850 nm VCSEL technology, MPO interface, and low power consumption below 3.5 W.
Craig ***** - Cardiff, United Kingdom
26/09/2025
A pleasure to work with and a reliable supplier!
John ***** - Egham, United Kingdom
12/09/2025
Always enjoy working with Carritech. They makes things easy.
Marcin ***** - Malsch, Germany
15/05/2025
Reliable supplier, always a pleasure to work with
Liliana ***** - Madrid, Spain
14/05/2025
Fast and friendly service, personalized support throughout
Marcus ***** - Bristol, United Kingdom
13/05/2025
A pleasure to deal with. Always rely on Carritech.
Jagielski ***** - Poznan, Poland
09/05/2025
Always good to do business with
Peter ***** - Eindhoven, Netherlands
07/05/2025
Always attentive and professional, TOP!
Grégory ***** - Mauguio, France
06/05/2025
Commercial efficace, société fiable
Zach ***** - Lakeland, Florida
01/05/2025
Great company to work with. Very flexible and reliable supplier.
Chloe ***** - Berkshire, United Kingdom
24/02/2025
Always a pleasure working with Christian Quality packaging!
Marcus ***** - Bristol, United Kingdom
03/03/2025
Fastest shipments I've seen in years. Credit to the industry.
Alfred ***** - Vienna, Austria
06/08/2018
Always a pleasure to work with whole Carritech Team!

Fast Worldwide Delivery

We ship to over 100 countries, ensuring your parts reach you quickly and reliably wherever your business operates.

Extensive Global Inventory

Thousands of optical transceivers in stock and ready to ship, helping you keep your networks running without delay.

Fully Customisable Labelling

Customise labels tailored to your business with flexible designs, branding, and specific information.

Product Specifications

The 100Gbps QSFP28 SR4 Optical Transceiver is a high-performance module optimized for short-range optical communication over multimode fiber (MMF) with transmission distances up to 100 meters using OM4 fiber. This transceiver integrates four independent full-duplex channels, each capable of supporting data rates up to 25Gbps, achieving a total aggregate bandwidth of 100Gbps. The module operates on a single +3.3V power supply with a maximum power consumption of 3.5W and connects via an MTP/MPO optical connector, ensuring ease of integration. Compliant with QSFP28 MSA and IEEE 802.3bm 100GBASE-SR4 standards, it is ideal for applications such as data center interconnects, rack-to-rack connections, and high-speed networking environments.

The transceiver features advanced digital diagnostic monitoring through a 2-wire serial interface, enabling real-time tracking of critical parameters such as temperature, voltage, and optical power. Designed to function reliably within a temperature range of 0°C to 70°C, the module is environmentally friendly, meeting RoHS compliance standards. Its robust construction and high functionality make it a dependable choice for modern networking solutions requiring high data rates and reliable short-range communication.

The CT-QSFP28-SR4 is a 100 Gb/s optical transceiver module compliant with IEEE 802.3bm 100GBASE-SR4 and QSFP28 MSA standards. It integrates 4 transmit and 4 receive channels, each operating at up to 25.78125 Gb/s, for an aggregate bandwidth of 100 Gb/s. Transmission is achieved over OM3 MMF up to 70 m or OM4 MMF up to 100 m via MPO/MTP connectors. Operating from a single +3.3 V supply, it consumes ≤ 3.5 W and supports digital diagnostics monitoring (DDM/DOM).

Key specifications

  • Form factor / standards: QSFP28 MSA; IEEE 802.3bm 100GBASE-SR4.
  • Data rate: 4×25.78125 Gb/s (aggregate 100 Gb/s).
  • Reach: 70 m (OM3), 100 m (OM4).
  • Optical wavelength: 850 nm VCSEL.
  • Connector: MPO/MTP-12.
  • Power consumption: ≤ 3.5 W; supply current ~1.06 A.
  • Supply voltage: 3.135–3.465 V.
  • Operating case temp: 0 °C to 70 °C.
  • Diagnostics: Digital diagnostics monitoring (DDM/DOM).
  • Compliance: RoHS-6; Class 1 Laser (EN 60825-1:2014; 21 CFR 1040.10/1040.11).

Optical characteristics (per lane unless noted)

Parameter Value
Wavelength 840–860 nm
TX avg launch power −8.4 to +2.4 dBm
TX OMA −6.4 to +3.0 dBm
Extinction ratio ≥ 2.0 dB
Receiver sensitivity (OMA) ≤ −9.2 dBm
Stressed receiver sensitivity (OMA) ≤ −5.2 dBm
Receiver damage threshold ≤ +3.4 dBm
LOS assert / de-assert −30 / −12 dBm

Applications

  • Rack-to-rack 100G Ethernet links in data centers.
  • High-performance computing interconnects including InfiniBand QDR/DDR/SDR.
  • Short-reach aggregation and backbone links over multimode cabling.

Features

  • 4-channel full-duplex parallel design with MPO/MTP interface.
  • 70 m (OM3) / 100 m (OM4) reach over multimode fiber.
  • Low power consumption (≤ 3.5 W) with single +3.3 V supply.
  • Integrated digital diagnostics (DDM/DOM).
  • Hot-pluggable QSFP28 form factor, RoHS-6 compliant.

Delivery

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.

We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.

Warranty

At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.

What Does Our Lifetime Warranty Cover?

Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:

  • Defects in Materials and Workmanship: If your product experiences any issues related to manufacturing or materials, we’ll repair or replace it free of charge.
  • Performance Assurance: Our optical transceivers are rigorously tested to meet industry standards, and we guarantee they’ll perform as expected in your network environment.
Easy Claims Process

Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.

Your Network’s Performance, Guaranteed

Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.

Datasheet Download

Performance Testing

At Carritech Optics, every product we supply undergoes a meticulous testing process designed to guarantee exceptional quality, reliability, and consistency. Our manufacturer operates within a professional laboratory environment, where advanced testing equipment and industry-standard procedures are used to carefully evaluate each item.

Reprogram your transceivers with speed, simplicity, and confidence.

Carritech’s Opticode is an advanced transceiver programming solution that gives you complete flexibility across your optical network. Designed to ensure seamless compatibility with a wide range of OEM systems, Opticode allows you to quickly reconfigure transceivers to meet your specific requirements. The result is greater control, reduced costs, and a more adaptable, future-proof infrastructure.

Craig ***** - Cardiff, United Kingdom
26/09/2025
A pleasure to work with and a reliable supplier!
John ***** - Egham, United Kingdom
12/09/2025
Always enjoy working with Carritech. They makes things easy.
Marcin ***** - Malsch, Germany
15/05/2025
Reliable supplier, always a pleasure to work with
Liliana ***** - Madrid, Spain
14/05/2025
Fast and friendly service, personalized support throughout
Marcus ***** - Bristol, United Kingdom
13/05/2025
A pleasure to deal with. Always rely on Carritech.
Jagielski ***** - Poznan, Poland
09/05/2025
Always good to do business with
Peter ***** - Eindhoven, Netherlands
07/05/2025
Always attentive and professional, TOP!
Grégory ***** - Mauguio, France
06/05/2025
Commercial efficace, société fiable
Zach ***** - Lakeland, Florida
01/05/2025
Great company to work with. Very flexible and reliable supplier.
Chloe ***** - Berkshire, United Kingdom
24/02/2025
Always a pleasure working with Christian Quality packaging!
Marcus ***** - Bristol, United Kingdom
03/03/2025
Fastest shipments I've seen in years. Credit to the industry.
Alfred ***** - Vienna, Austria
06/08/2018
Always a pleasure to work with whole Carritech Team!

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100GBASE-SR4 QSFP28 100m

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