FTL4S1QE2C Finisar Compatible 40G QSFP+ 350m Transceiver

# Key Highlights
  • Type:40GBASE QSFP
  • Compatibility:Finisar Compatible
  • Tx/Rx Wavelength:850, 880, 910, 940nm
  • Laser:VSCEL
  • Fiber Type:Multi-Mode Fiber (MMF)
  • Connectors:Double LC
  • Optical Budget:4.5 dB
  • Max. Distance:350m
  • Data Rate:41.2 Gbps
  • FEC Forward Error Correction:Supported
  • DDM/DOM:Supported
  • Power Consumption:≤4.5W
  • Temperature:Standard 0°-70°C
# Pricing & Ordering


Standard recommended retail price without VAT.

Lead Time: Next Business Day from Order Confirmation
# Quality Assurance

Because of our comprehensive Testing Program, we are confident on quality of our products. Such approach empower us to cover all our products with:

# Key Technical Data
Media Type:


TX Wavelength:

RX Wavelength:

Minimum Optical Budget:

Maximum Distance:

Supported Data Rate:

Supported Applications:


CDR (Clock and Data Recovery) chip

Forward Error Correction (FEC):

Transmitter Type:

Tx Wavelength Bandwidth:

Average Launch Power (Min) Each Lane:

Average Launch Power (Max) Each Lane:

Extinction Ratio (Min):

Receiver Type:

Rx Wavelength Bandwidth:

Average Receiver Sensitivity (Min) Each Lane:

Receiver Overload:

Temperature Range:

Storage Temperature:

Power Consumption:



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# Product Documentation
SWDM4-40G-QSFP-350 Datasheet

Finisar Compatible FTL4S1QE2C is based on our product SWDM4-40G-QSFP-350. When You will order it will be encoded to be compatible with Finisar equipment and it will be labeled with part number: SWDM4-40G-QSFP-350-FI, where FI means Finisar Compatible. Above You can download the datasheet of our SWDM4-40G-QSFP-350.

# Product Description

Our Compatible Finisar FTL4S1QE2C QSFP+ transceiver is based on our SWDM4-40G-QSFP-350 product, which has the same parameters and is manufactured in accordance with the same industry standards as its OEM counterpart. Our compatible module version is designed for operation over a Double Fiber Multi-Mode Fiber (MMF) optical cable. It has a minimum guaranteed optical budget of 4.5 dB, which typically is enough to reach about 350 meters over OM5 type fiber. However, distance is only an indicative parameter calculated for identification comfort. Finally, we calculate distance while keeping in mind the minimum (guaranteed) optical budget and the average attenuation of optical cabling in the industry. Our Finisar FTL4S1QE2C compatible transceiver uses a high-quality VSCEL Laser transmitter operating at 850, 880, 910, 940nm nominal wavelength and a 850, 880, 910, 940nm PIN Photodiode receiver. This module supports DDM/DOM optical diagnostics and provides diagnostic data about the current operating conditions. This compatible module has a Double LC connector and module is designed for operation in standard temperature networking environments ranging from 0°-70°C. The transceiver chipset supports data rates ranging from up to 41.2 Gbps and such applications as 40G Ethernet (41.25Gbps). It is important to note that the mentioned application support will vary depending on the port where the module will be used, and it supported applications as well as module speed configuration during ordering process, but we can ensure that our module will support at least the same functionality as its OEM counterpart. This is a multi-purpose transceiver that can be used in a variety of different places in today’s networking. As a result, Internet Service Provider (ISP) Aggregation and Backbone, Mobile Operator Core Networks and Data Center Core Network interconnections are the most popular applications for this product.

Our compatible Finisar FTL4S1QE2C module is CE/RoHS certified, it meets product safety standards, and is compliant with QSFP Multi Source Agreement (MSA) SFF-8436 industry standard. To ensure smooth operation, we have completed compatibility tests for this module with the most recent platforms of Finisar networking equipment, allowing us to encode transceiver EEPROM memory to be compatible with and work seamlessly in Finisar platforms. We are committed to quality, therefore before delivering our products, we conduct stringent quality inspections that include optical parameter measurements, connector cleanliness tests, and EEPROM memory data validation tests. If you have any questions, please Contact us. We will gladly learn about your needs and recommend the best compatible products from our portfolio.