Optical Transceivers 25G/32G SFP28 Module Suppliers & Exporters

High-Density, Low-Latency Interconnect Solutions Engineered for Enterprise Cloud Computing, 5G Fronthaul, and Next-Gen Data Center Infrastructures.

The Evolution of High-Speed Interconnects: Why 25G/32G SFP28 Rules Next-Gen Architecture

The global networking landscape is undergoing a massive structural shift. Traditional 10G Ethernet architectures are no longer sufficient to handle the bandwidth demands of modern applications, while 40G migration paths have proved to be economically inefficient for top-of-rack (ToR) switch connections. This is where 25G/32G SFP28 transceivers come in as the optimal solution for transition and growth.

Architecturally based on the SFP+ form factor, SFP28 modules utilize a single 25Gbps lane to transmit data, eliminating the complex lane-aggregation required in older 40G systems (which use four 10Gbps lanes). This design provides a 2.5x increase in bandwidth with a significantly reduced thermal footprint and cabling density. For storage networks (SANs), 32G Fibre Channel SFP28 modules offer the exact physical profile needed to support high-throughput, low-latency NVMe-over-Fabrics deployment schemes.

By bypassing the physical sizing constraints of larger form factors like QSFP, network engineers can optimize panel density while taking advantage of standard LC duplex connectivity, saving massive amounts in structural capital expenditure (CAPEX).

Key Engineering Specifications

  • Form Factor: SFP28 (Small Form-factor Pluggable 28) complying with SFF-8402 & SFF-8432 standards.
  • Data Rate: 24.3Gbps to 32.2Gbps multi-rate capability for dual-rate Ethernet and Fibre Channel applications.
  • Optical Source: High-reliability 850nm VCSEL, 1310nm DFB, or CWDM/DWDM EML lasers.
  • Power Consumption: Extremely low thermal design, typically < 1.0W for SR/LR modules and < 1.5W for extended-reach ER modules.
  • Diagnostic Interfaces: I2C 2-wire serial interface providing real-time diagnostic monitoring (DDM/DOM).

Transolix Company Profile & Manufacturing Pedigree

A decade of optical engineering excellence focused on absolute signal integrity and component reliability.

2016 Established Year
11 Yrs Industry Experience
128 R&D Engineers
$8-15M Annual Export Rev

Rigorous Verification and Inspection Systems

At Transolix, quality is not just a standard; it is our foundation. Operating with an internal reliability standard alongside ISO 9001 quality system certification, we maintain a dedicated staff of 42 QC professionals to ensure every transceiver module that leaves our facility performs flawlessly under real-world conditions.

Our systematic testing methodology incorporates automated optical testing, eye diagram analysis for jitter and signal integrity, comprehensive environmental thermal aging tests, and 100% final performance compatibility verification on the target brand switch platforms (including Cisco, Juniper, Arista, and HPE). Our manufacturing ecosystem is reinforced by 860 certified upstream supply chain partners, guaranteeing reliable sourcing of high-precision optical sub-assemblies (OSA) and silicon circuitry.

China Optical Cluster: Advanced Manufacturing & Cost Leadership

Why global data centers choose Chinese-engineered transceivers for large-scale operations.

Complete Vertical Integration

Our proximity to China's leading semiconductor and precision optics supply chains lets us source wafers, TO-can packaging materials, and micro-optics instantly, reducing design-to-delivery lead times by up to 40%.

Unparalleled Customization

Our engineering team customizes key module firmware, optical parameters, wavelength configurations, and internal EEPROM coding. We support OEM/ODM branding tailored to complex client systems.

Automated Production Scaling

By leveraging advanced robotic chip pick-and-place, automated wire bonding, and automated optical calibration stations, we maintain consistent high yields while lowering unit assembly costs.

Application Scenarios & Macro Networking Solutions

How high-performance SFP28 technologies drive industrial transformation globally.

1. 5G Fronthaul & Midhaul Networks

Deploying Baseband Units (BBU) and Active Antenna Units (AAU) in remote radio towers demands industrial-temperature (-40°C to +85°C) rated 25G BiDi (Bidirectional) SFP28 transceivers. Operating over a single fiber strand using dual wavelengths (e.g., 1270nm/1310nm), our modules cut optical fiber leasing costs in half while securing latency profiles below microsecond ranges. This is critical for next-gen ultra-reliable low-latency (URLLC) services.

2. Hyper-scale Data Centers (Spine-Leaf)

In modern flat Spine-Leaf topologies, 25G SFP28 transceivers provide the critical link between the server NICs and the top-of-rack (ToR) switch ports. SFP28 SR (Short Range) multimode transceivers allow for cost-effective rack-to-rack links up to 100 meters, while LR (Long Range) single-mode alternatives span up to 10km across separate data halls. This path enables seamless upgrade routes to 100G (4x 25G) and 400G backbones.

3. High-Performance Enterprise Storage Area Networks (SAN)

To match the read/write performance of high-density flash arrays, flash storage nodes employ 32G Fibre Channel SFP28 transceivers. These links prevent queue congestion during high-volume enterprise transactions, database writes, and disaster recovery replication operations.

4. Metro Wavelength Division Multiplexing (WDM)

For telco operators running resource-constrained links, CWDM and DWDM 25G SFP28 modules support passive multiplexing over standard dark fiber. Operators can bundle up to 40 distinct 25G traffic streams onto a single fiber pair, eliminating the need to trench new cables in urban environments.

Global Procurement Strategy: Avoiding Compatibility Pitfalls

Purchasing managers must navigate the hidden compatibility blocks set by OEM switch brands. When sourcing 25G/32G SFP28 modules, the key selection metrics must include:

EEPROM/MCU Coding: Ensuring proper vendor key signature and checksum values to prevent "unrecognized module" port shutdown warnings.

Real-Time DDM: Tracking transceiver temperature, bias current, optical TX power, RX power, and supply voltage.

Thermal Dissipation Profile: Designing modules with high-efficiency heatsinks to avoid thermal throttling during peak operations.

Customization Capability and Industry Standards Alignment

Each batch of Transolix modules is fully aligned with global multi-source agreements (MSA). This ensures that physical dimensions, electrical interfaces, and optical characteristics match generic industry platforms, preserving system interoperability across mixed environments.

Additionally, our 128 R&D engineers continuously develop new models (such as the 86 models released last year) to stay ahead of upcoming network standards, guaranteeing that your fiber infrastructure upgrades remain secure and future-proof.

Technical Deep-Dive & FAQ

Detailed answers to critical engineering and procurement inquiries regarding 25G/32G SFP28 modules.

Q1: Can a 25G SFP28 module operate in a standard 10G SFP+ port?
Generally, standard 25G SFP28 modules do not auto-negotiate down to 10G unless specifically programmed as "dual-rate" modules (such as our Cisco SFP-10/25G-CSR-S Compatible dual-rate modules). The physical configuration is identical, but the switch ASIC must support multi-rate switching (10G/25G) on that specific port.
Q2: What is the primary difference between SFP28 SR, LR, and ER modules?
The differences lie in the optical engine, wavelength, and maximum transmission distance:
  • SR (Short Range): Uses 850nm VCSEL over Multimode Fiber (MMF) for reaches up to 100m (OM4).
  • LR (Long Range): Uses 1310nm DFB laser over Singlemode Fiber (SMF) for reaches up to 10km.
  • ER (Extended Range): Uses 1310nm or 1550nm EML lasers over Singlemode Fiber (SMF) for reaches up to 40km, requiring robust heat dispersion management.
Q3: How does Forward Error Correction (FEC) affect 25G SFP28 link configuration?
To achieve error-free transmission over maximum physical distances, 25G Ethernet utilizes FEC (either IEEE 802.3by RS-FEC or BASE-R FEC). The host switch ports on both ends of the fiber run must use matching FEC configurations (both enabled or both disabled) to establish a link.
Q4: What are the benefits of choosing 25G BiDi (Bidirectional) SFP28 modules?
BiDi transceivers use a built-in WDM diplexer to send and receive signals on different wavelengths (typically 1270nm and 1330nm) over a single strand of Singlemode Fiber. This allows network administrators to double fiber network capacity without laying new cables, saving massive installation and leasing costs.
Q5: How does Transolix guarantee absolute switch compatibility?
Every transceiver is programmed with vendor-specific EEPROM signature data and tested on the target hardware platforms in our test laboratory. This verification process mimics real-world network loads to ensure seamless configuration recognition, functional DDM metrics, and error-free port operations.
Q6: What is the difference between SFP28 and 32G Fibre Channel transceivers?
While they share the same physical form factor, they run on different storage and network protocols. SFP28 modules are designed for Ethernet applications running at 25.78Gbps, while 32G Fibre Channel transceivers run at 28.05Gbps to support Fibre Channel storage networks (SAN).

Advanced Facility & Production Operations

Inside our quality-controlled assembly line and laboratory environments where precision reliability is built.

All 25G/32G SFP28 Module Products