1000BASE-EX SFP 20km Industrial Transceiver: 1.25G-SFP-20DI

Our EDGEOPTIC 1.25G-SFP-20DI is a multi-vendor compatible 1000BASE-EX SFP dual-fiber optical module designed for Gigabit Ethernet applications operating over single-mode fiber cabling in industrial environments. The 1.25G-SFP-20DI module operates at 1310nm wavelength for transmission and reception, with data rates from 1.063 to 1.25 Gbps and supports multiple protocol standards and applications. Our 1000BASE-EX SFP transceiver utilizes FP (Fabry-Perot) laser for transmission and PIN photodiode for receiving. Transceiver ensures a 13 dB guaranteed optical link budget, which determines the maximum transmission distance. Over single-mode fiber, the transceiver can reach distances up to 20 kilometers, providing extended reach connectivity for industrial and harsh environment deployments. However, distance is just an indicative parameter calculated for comfort of identification – eventually we calculate distance taking into account minimal optical budget and average attenuation of optical cabling in industry.

1.25G-SFP-20DI compatible 1000BASE-EX module is hot-pluggable SFP with duplex LC/UPC connectors as an optical interface. The electrical interface conforms to INF-8074i MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP host systems supporting multiple vendor equipment platforms. Our 1000BASE-EX SFP transceiver can be encoded to be compatible and successfully operate in different 80+ brands of equipment. The module incorporates DDM/DOM (Digital Diagnostic Monitoring) functionality providing real-time information including transmitted and received optical power levels, module temperature, bias current, and supply voltage. This diagnostic data is available via MSA-compatible EEPROM interface and enables monitoring of transceiver operational parameters. The module operates within an industrial temperature range of -45°C to +85°C, providing reliable performance in extreme environmental conditions.

Standards compliance includes IEEE 802.3z for Gigabit Ethernet and support for 1G Fiber Channel applications at 1.0625 Gbps. The transceiver achieves multi-vendor interoperability through adherence to industry MSA standards, though equipment with vendor-specific module validation may require custom EEPROM programming for compatibility. Our 1000BASE-EX SFP transceiver is CE/RoHS certified, and it is compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Typical applications are industrial campus networks, outdoor equipment cabinets, transportation infrastructure, utility substations, and manufacturing facility interconnects. The industrial temperature rating enables deployment in unconditioned environments including roadside cabinets, remote equipment shelters, mining operations, and extreme climate installations. The 20km reach capability provides sufficient distance for extended campus and metropolitan deployments while maintaining cost-effectiveness. With transmit power ranging from -9 to 3 dBm and receiver sensitivity of -22 dBm, the module delivers stable operation across the full industrial temperature range. Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanness tests and SFP transceiver EEPROM memory data validation tests.