FiddlLink FiddlLink

China Top 10 100G QSFP28 Module Suppliers

Time：2026-10-17 Author：Sienna
0%

Table of Contents

China’s 100G QSFP28 module market has become a practical choice for data centers, telecom networks, and high-capacity enterprise links. This guide examines ten leading Chinese suppliers through technical capability, production experience, testing discipline, and customer support. The focus is not only on catalog claims. It also considers optical performance, interoperability, delivery consistency, and field reliability.

A 100G QSFP28 module must handle demanding conditions. Engineers inspect four-lane 25Gbps signaling, transmission distance, power consumption, connector quality, and temperature stability. A module may look competitive on paper, yet perform differently inside a crowded rack. Peter Winzer, a respected optical communications expert, describes the field this way: “Optical communications is the nervous system of the Internet.” His point remains useful here. Reliable optical components support every layer above them.

The suppliers in this list are not ranked by marketing visibility alone. Their product portfolios, manufacturing depth, quality controls, and international service capacity also matter. Some companies specialize in short-range multimode links. Others focus on single-mode 100G LR4, CWDM4, or extended-temperature applications. Those differences are easy to overlook.

There is no perfect supplier for every network. Buyer requirements vary.

Price can also mislead. A lower quotation may involve limited testing, longer qualification work, or weaker after-sales support. Public company information is sometimes incomplete, and supplier capabilities can change quickly. Therefore, this overview should support technical due diligence, not replace it. Request current datasheets, test reports, compatibility records, and sample units before making a final purchasing decision.

China Top 10 100G QSFP28 Module Suppliers
Table of Contents [Hide]
1 100G QSFP28 Modules: Definition, Standards, and Main Applications
2 How China’s Top 10 100G QSFP28 Suppliers Are Selected
3 Profiles of China’s Leading 100G QSFP28 Module Suppliers
4 Product Comparison: Performance, Compatibility, and Pricing
5 How to Choose a Reliable Chinese 100G QSFP28 Supplier

100G QSFP28 Modules: Definition, Standards, and Main Applications

100G QSFP28 Modules: Definition, Standards, and Main Applications

A 100G QSFP28 module is a compact optical transceiver for high-speed network links. It usually carries 100Gbps through four 25Gbps electrical lanes. The module connects switches, routers, servers, or storage systems inside data centers. Its small form factor also supports dense rack designs.

Common specifications include the QSFP28 MSA and IEEE 802.3ba standards. Different optical versions support short, medium, or longer transmission distances. Some use parallel multimode fiber with MPO connectors. Others use duplex single-mode fiber with LC connectors. Selection must match fiber type, distance, wavelength, and equipment coding. In real installations, a mismatch can cause unstable links, even when the labels appear correct. That detail is easy to underestimate.

Tips: Confirm DOM readings, connector polarity, and firmware compatibility before deployment. Test every link with a calibrated optical meter. Keep insertion loss records. These records help during troubleshooting. Main applications include data center spine-leaf connections, server aggregation, cloud infrastructure, and telecom transport networks. Power consumption and thermal performance also matter in crowded cabinets. Lower power is useful, but it may not guarantee better stability. No selection is perfect. Engineers should review actual traffic patterns, maintenance skills, and future upgrade plans instead of choosing only by price.

China Top 10 100G QSFP28 Module Suppliers - 100G QSFP28 Modules: Definition, Standards, and Main Applications
Module Type Definition and Optical Interface Relevant Standard or MSA Transmission Medium Typical Reach Wavelength / Lane Configuration Connector Main Applications
100GBASE-SR4 Short-reach parallel optical module for four independent 25 Gb/s lanes. IEEE 802.3bm; QSFP28 MSA Multimode fiber, normally OM3 or OM4 Up to 70 m on OM3; up to 100 m on OM4 850 nm; 4 × 25.78 Gb/s NRZ MPO-12 or equivalent multifiber connector Data-center leaf–spine links, server aggregation, and short rack-to-rack connections
100GBASE-SRBD Bi-directional short-reach module using two optical wavelengths over two multimode-fiber pairs. IEEE 802.3bm; QSFP28 MSA Multimode fiber, typically OM3 or OM4 Up to 70 m on OM3; up to 100 m on OM4 Approximately 832 nm and 918 nm; bidirectional 2 × 50 Gb/s optical paths Duplex LC High-density data-center links where duplex LC cabling is preferred
100G PSM4 Parallel single-mode module with four independent 25 Gb/s optical lanes. PSM4 MSA; QSFP28 MSA Single-mode fiber Up to 2 km 1310 nm; 4 × 25.78 Gb/s NRZ MPO-12 or equivalent multifiber connector Data-center interconnects and campus links requiring longer reach than multimode optics
100G CWDM4 Coarse-WDM module that multiplexes four 25 Gb/s lanes onto one duplex single-mode-fiber pair. CWDM4 MSA; QSFP28 MSA Single-mode fiber Up to 2 km Four CWDM wavelengths near 1271, 1291, 1311, and 1331 nm; 4 × 25.78 Gb/s NRZ Duplex LC Switch-to-switch connections, structured cabling, and short data-center interconnects
100GBASE-DR Single-lambda, single-mode module designed for one 100 Gb/s optical channel. IEEE 802.3cu; QSFP28 MSA Single-mode fiber Up to 500 m 1310 nm; 100G PAM4 electrical and optical signaling Duplex LC High-density data-center fabrics and short single-mode links
100GBASE-FR1 Single-lambda 100G module optimized for moderate-reach single-mode transmission. IEEE 802.3cu; QSFP28 MSA Single-mode fiber Up to 2 km 1310 nm; 100G PAM4 Duplex LC Data-center interconnects, metropolitan access, and enterprise backbone links
100GBASE-LR1 Single-lambda long-reach module for standard single-mode-fiber infrastructure. IEEE 802.3cu; QSFP28 MSA Single-mode fiber Up to 10 km 1310 nm; 100G PAM4 Duplex LC Metro data-center interconnects, carrier networks, and enterprise WAN access
100GBASE-LR4 Long-reach wavelength-division multiplexed module carrying four 25 Gb/s lanes over one fiber pair. IEEE 802.3ba; QSFP28 MSA Single-mode fiber Up to 10 km Four LAN-WDM wavelengths around 1310 nm; 4 × 25.78 Gb/s NRZ Duplex LC Data-center interconnects, metropolitan networks, and high-capacity enterprise links
100GBASE-ER4 Extended-reach WDM module using four optical lanes for longer single-mode-fiber links. IEEE 802.3ba; QSFP28 MSA Single-mode fiber Up to 40 km Four LAN-WDM wavelengths near 1310 nm; 4 × 25.78 Gb/s NRZ Duplex LC Regional data-center interconnects, metropolitan networks, and service-provider transport
100G ER4L Extended-reach 100G WDM module designed for applications between standard LR4 and ER4 distances. 100G ER4L MSA; QSFP28 MSA Single-mode fiber Typically up to 25 km, depending on link budget and deployment conditions Four LAN-WDM wavelengths around 1310 nm; 4 × 25.78 Gb/s NRZ Duplex LC Metro data-center interconnects and regional network aggregation

How China’s Top 10 100G QSFP28 Suppliers Are Selected

China’s Top 10 100G QSFP28 suppliers are selected through evidence, not advertising visibility. The evaluation uses optical performance, production consistency, technical support, and verified customer experience. LightCounting’s 2024 optical communication report identifies data-center connectivity as a continuing demand driver, making stable 100G supply increasingly important. Price alone is not enough.

Each supplier is assessed with a weighted framework. Optical testing and interoperability receive 30% of the score. Manufacturing capacity and quality control receive 25%. Compliance documentation, traceability, and warranty procedures receive 20%. Field deployments and response time account for the remaining 25%. Independent test reports should confirm reach, power consumption, error performance, and temperature stability. A module may pass a laboratory test yet behave differently in a crowded rack.

Omdia’s data-center networking research highlights sustained investment in higher-speed infrastructure, while Dell’Oro reports continued growth in data-center switching demand. These findings support a practical selection method, but market reports cannot replace inspection. Samples should be tested across switches, fiber types, and operating temperatures. Supplier interviews also matter. No ranking is flawless. A spreadsheet can miss late deliveries, unclear firmware practices, or weak after-sales communication. The final top-ten list therefore favors repeatable evidence, transparent specifications, and long-term engineering reliability over short-term discounts.

Profiles of China’s Leading 100G QSFP28 Module Suppliers

China Top 10 100G QSFP28 Module Suppliers

Profiles of China’s Leading 100G QSFP28 Module Suppliers

China’s leading 100G QSFP28 module suppliers serve data centers, telecom networks, and enterprise infrastructures. Their portfolios commonly include SR4, LR4, and CWDM4 versions. Each profile should be judged by more than price. Optical reach, power consumption, temperature range, and host compatibility matter during deployment.

Reliable suppliers usually operate controlled assembly lines and maintain traceable test records. Their engineers verify transmitter power, receiver sensitivity, wavelength stability, and bit error rate. Some suppliers also provide digital diagnostic monitoring for temperature, voltage, and optical levels. That detail helps technicians identify unstable links before failures spread.

A strong supplier profile includes production experience, transparent specifications, and responsive technical support. Buyers should request sample testing with their own switches and fiber types. This step often reveals issues hidden by laboratory results. Interoperability can be imperfect. Even compliant modules may behave differently across firmware versions or older network equipment.

The top ten should also be compared through lead times, customization ability, warranty terms, and documentation quality. Suppliers with clear labeling and consistent packaging reduce installation mistakes. Some offer coding services for specific platforms, but buyers should confirm approval requirements first. A lower quotation may hide weaker screening or limited after-sales support. No supplier is perfect. Careful verification remains necessary.

Product Comparison: Performance, Compatibility, and Pricing

China Top 10 100G QSFP28 Module Suppliers

Product Comparison: Performance, Compatibility, and Pricing

A reliable 100G QSFP28 comparison starts with the optical standard. SR4 typically supports short multimode-fiber links up to 100 meters. LR4 can reach about 10 kilometers over single-mode fiber. These figures match common IEEE 802.3 specifications. In practice, connector cleanliness and fiber quality can reduce the usable distance. I have seen link failures caused by dust, not defective modules.

Performance also depends on host compatibility. Check the switch’s port coding, firmware requirements, and forward error correction settings before purchasing. LightCounting’s 2024 optical market analysis reports continued demand for high-speed data-center optics, while Dell’Oro Group’s 2024 Ethernet research highlights sustained data-center capacity expansion. These reports support the market need, but they do not prove every module performs equally. That distinction matters. A module may pass a basic link test yet show higher temperature or weaker stability during long workloads.

Tips: Request DOM data, a test report, and a written compatibility list. Compare actual power consumption, not only advertised speed. Pricing varies with chipset, warranty, fiber type, and order volume. Low-cost units can reduce the initial budget, but replacement labor may erase the saving. My comparison method is imperfect because test environments differ. Still, measuring temperature, error counters, and traffic stability gives a more honest result than price alone.

How to Choose a Reliable Chinese 100G QSFP28 Supplier

Choosing a reliable Chinese 100G QSFP28 supplier requires more than comparing online prices. LightCounting’s 2024 Optical Transceiver Market Update highlights strong demand from cloud computing and data centers, while also noting severe pricing pressure. This makes quality verification essential. Ask for current test records, not only attractive product photos. The module should support the stated wavelength, transmission distance, connector type, and temperature range.

Request compatibility evidence for your exact switch or router models. A serious supplier can provide EEPROM data, DOM readings, eye diagrams, and test results from temperature cycling. Check whether the supplier uses traceable components and controlled production procedures. ISO 9001 certification helps, but it does not replace product-level testing. Experience matters here. A supplier that has solved link instability before may respond faster than one offering the lowest quotation.

Inspect the sample under real conditions. Test link uptime, optical power, error counts, and interoperability over several days. The Ethernet Alliance roadmap shows that higher-speed networks are expanding, but 100G remains practical for many enterprise and regional data-center links. Do not accept vague claims about “universal compatibility.” Require a written warranty, clear replacement terms, and technical support hours. Also verify export documents and packaging quality. Small issues matter. A poorly sealed box can damage connectors during transport. No checklist is perfect. I would still request an independent sample test before placing a large order.

FAQS

What is the typical reach of a 100G SR4 module?

SR4 usually supports multimode-fiber links up to 100 meters. Dust can reduce that distance.

How far can a 100G LR4 module transmit?

LR4 can reach about 10 kilometers over single-mode fiber. Fiber quality still matters.

What should I check before buying a 100G QSFP28 module?

Check port coding, firmware needs, and forward error correction settings. Confirm the connector and fiber type.

How can I verify compatibility with my switch or router?

Request a written compatibility list for your exact model. Ask for EEPROM data and DOM readings.

Which testing data should a supplier provide?

Request optical power, temperature, error counters, eye diagrams, and traffic stability results. Photos are not enough.

Should I choose the lowest-priced module?

Not automatically. Lower prices may hide higher replacement labor or weaker long-term stability.

What details affect 100G QSFP28 pricing?

Chipset, warranty, fiber type, testing depth, and order volume can change the price. Compare total ownership cost.

How should I test a supplier’s sample?

Test it for several days under real traffic. Record link uptime, temperature, optical power, and errors.

Does certification guarantee reliable module performance?

Certification supports controlled production, but it does not replace product-level testing. My comparison method is imperfect.

What packaging and support details should I confirm?

Confirm warranty terms, replacement procedures, support hours, export documents, and sealed packaging. Small details matter.

Conclusion

This article provides a practical overview of the 100G QSFP28 module, explaining its basic structure, transmission standards, optical interfaces, and common applications in data centers, enterprise networks, cloud computing, and telecommunications. It also introduces a clear method for evaluating China’s leading suppliers, focusing on product quality, technical capability, manufacturing capacity, certification, delivery reliability, customer support, and industry experience rather than brand popularity alone.

Readers will also find a comparison of supplier performance, device compatibility, transmission distance, power consumption, customization options, and pricing considerations. The final section offers useful guidance for selecting a reliable Chinese supplier, including how to verify specifications, test interoperability, review quality-control procedures, assess warranty policies, and communicate technical requirements. By following these criteria, buyers can reduce procurement risks and choose a 100G QSFP28 module that delivers stable performance, dependable compatibility, and suitable long-term value for their network infrastructure.

Blog Tags:

Sienna
Updated:
Sienna

Sienna

Sienna is a skilled marketing professional with a deep expertise in our company’s core products and services. With a passion for innovation and detail, she plays a pivotal role in crafting insightful blog posts that not only highlight the unique features of our offerings but also provide valuable......