Sopto 1.25G SFP Optical Module — P551G-XXD, 1550 nm, LC, (40/80/100 km)

The Sopto SPT-P551G-XXD is a 1.25 Gbps SFP optical transceiver for single-mode fiber applications at 1550 nm wavelength. With an LC connector and hot-pluggable design, it supports transmission distances up to XX km (variant dependent). Fully compliant with IEEE 802.3z and SFP MSA standards, it features digital diagnostics (DDM) for reliable Gigabit connectivity in enterprise, ISP, and metro networks.

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Description

The Sopto SPT-P551G-XXD is a high-performance Gigabit SFP optical transceiver that enables 1.25 Gbps full-duplex transmission over single-mode fiber at a 1550 nm wavelength. Designed for long-haul connectivity, it supports link distances of up to 40 km, 80 km, or 100 km, depending on the variant (40D, 80D, 100D).

Built to IEEE 802.3z 1000BASE-LH standards and fully compliant with SFP MSA, SFF-8472, and RoHS, the module ensures interoperability across a wide range of networking devices. It features digital diagnostics (DDM), providing real-time monitoring of optical parameters such as TX/RX power, temperature, and voltage, improving network reliability.

With its hot-pluggable LC duplex interface, compact size, and low power consumption, the SPT-P551G-XXD is easy to deploy in enterprise, service provider, and metro Ethernet networks. Rugged housing with EMI shielding and availability in commercial (0–70 °C) and industrial (–40–85 °C) temperature grades make it a versatile solution for high-performance fiber connectivity.


Application

Enterprise backbones, ISP access, FTTH, Metro Ethernet, Long-haul fiber links


Key Features

  • ✅ 1.25 Gbps full-duplex Gigabit SFP module

  • ✅ Operates at 1550 nm wavelength

  • ✅ Supports XX km reach (40, 80, or 100 km variant)

  • ✅ LC duplex connector, hot-pluggable design

  • ✅ Digital diagnostics monitoring (DDM) support

  • ✅ Low power consumption, EMI-shielded housing

  • ✅ Commercial (0–70 °C) and industrial (–40–85 °C) versions

  • ✅ IEEE 802.3z, SFP MSA, SFF-8472 compliant

Specifications

 

Specification Details
Brand Sopto
Model SPT-P551G-XXD
Product Type SFP Optical Transceiver
Data Rate 1.25 Gbps
Wavelength 1550 nm
Fiber Type Single-mode fiber (9/125 µm)
Optical Interface LC duplex
Maximum Reach XX km (40D = 40 km, 80D = 80 km, 100D = 100 km)
Digital Diagnostics Yes (DDM, SFF-8472)
Power Supply 3.3 V DC
Power Consumption < 1 W typical
Hot-Pluggable Yes
Operating Temperature 0 °C to 70 °C (Commercial) –40 °C to +85 °C (Industrial “D”)
Storage Temperature –40 °C to +85 °C
Standards Compliance IEEE 802.3z 1000BASE-LH, SFP MSA, SFF-8472
Housing Metal casing with EMI shielding
Package Contents 1 × SPT-P551G-XXD module
Warranty 9 months

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