Sopto 1.25G BiDi SFP Modules — PB541G + PB451G, LC, 1490/1550 nm (80 km/100 km))

The Sopto SPT-PB541G-LXXD + SPT-PB451G-LXXD is a bi-directional 1.25G SFP transceiver pair designed for single-fiber links. One module transmits at 1550 nm / receives 1490 nm, and the other transmits at 1490 nm / receives 1550 nm. Featuring a simplex LC interface, hot-pluggable design, and DDM support, this pair provides reliable Gigabit Ethernet connectivity for FTTH, enterprise, and ISP networks.

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Description

The Sopto SPT-PB541G-LXXD + SPT-PB451G-LXXD BiDi transceiver set enables 1.25Gbps full-duplex communication over a single strand of single-mode fiber, reducing fiber deployment costs. Each module operates on complementary wavelengths — 1550 nm TX / 1490 nm RX for the PB541G-LXXD and 1490 nm TX / 1550 nm RX for the PB451G-LXXD.

Designed for Gigabit Ethernet and 1G Fibre Channel applications, these modules comply with IEEE 802.3z 1000BASE-BX, SFP MSA, and SFF-8472 standards. They feature digital diagnostics monitoring (DDM), enabling operators to monitor key parameters like optical power, temperature, and voltage in real time.

With LC simplex connectors, a hot-pluggable form factor, and low power consumption (<1 W), the modules are easy to deploy and maintain. Their availability in commercial (0–70 °C) and industrial (–40–85 °C) grades makes them a robust solution for FTTH access networks, enterprise backbones, and campus deployments.


Application

FTTH, Enterprise LANs, ISP access, Campus networks, Single-fiber Gigabit links


Key Features

  • ✅ 1.25Gbps full-duplex transmission over a single fiber

  • ✅ Pair: 1550 nm TX / 1490 nm RX + 1490 nm TX / 1550 nm RX

  • ✅ Simplex LC optical connector

  • ✅ Hot-pluggable SFP form factor

  • ✅ Digital diagnostics monitoring (DDM) support

  • ✅ Compliant with IEEE 802.3z, SFP MSA, SFF-8472

  • ✅ Low power consumption (<1 W)

  • ✅ Available in commercial and industrial versions

Specifications

 

Specification Details
Brand Sopto
Model / Series SPT-PB541G-LXXD + SPT-PB451G-LXXD
Product Type Bi-Directional SFP Transceiver Pair
Data Rate 1.25 Gbps
Wavelengths PB541G: 1550 nm TX / 1490 nm RX PB451G: 1490 nm TX / 1550 nm RX
Fiber Type Single-mode fiber (9/125 µm)
Optical Interface Simplex LC
Maximum Reach 80 km, 100 km
Digital Diagnostics Yes (DDM, SFF-8472)
Standards Compliance IEEE 802.3z 1000BASE-BX, SFP MSA, 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
Housing Metal casing with EMI shielding
Package Contents 1 × SPT-PB541G-LXXD module 1 × SPT-PB451G-LXXD module
Warranty 9 months

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