Sopto SFP28 Bi-Directional 25G Pair — B3327-LRS + B2733-LRS, 20 km

The Sopto SPT-SFP28B3327-LRS + SPT-SFP28B2733-LRS BiDi pair enables 25 Gbps full-duplex transmission over a single strand of SMF. One module transmits at 1330 nm / receives 1270 nm, the other at 1270 nm / receives 1330 nm. Featuring LC simplex connectors, hot-pluggable SFP28 design, and DDM support, this pair supports up to 20 km reach under commercial temperature, making it ideal for data centers, enterprise backbones, and ISP networks.

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Description

The Sopto SPT-SFP28B3327-LRS + SPT-SFP28B2733-LRS are 25G BiDi SFP28 optical transceivers, designed for high-speed single-fiber connectivity in data centers, cloud infrastructures, and service provider backbones. By using complementary wavelengths — 1330 nm TX / 1270 nm RX and 1270 nm TX / 1330 nm RX — they achieve bidirectional full-duplex communication over a single 9/125 µm single-mode fiber, reducing fiber deployment costs.

Compliant with IEEE 802.3by 25GBASE-LR, SFP28 MSA, SFF-8402, and SFF-8472, these modules ensure interoperability with a wide range of switches and routers. They feature digital diagnostics monitoring (DDM) for real-time visibility into operating parameters such as optical power, voltage, and module temperature.

With a reach of up to 20 km, LC simplex interface, and hot-pluggable 3.3 V design, the LRS series is optimized for commercial temperature environments (0 °C to 70 °C). Compact, reliable, and power-efficient (< 1.5 W), they are well-suited for metro links, enterprise interconnects, and cloud data centers needing 25G connectivity over longer distances.


Application

Data centers, Enterprise networks, ISP backbone, Metro Ethernet, Single-fiber 25G links


Key Features

  • ✅ 25 Gbps BiDi transmission over a single SMF strand

  • ✅ Pair: 1330 nm TX / 1270 nm RX + 1270 nm TX / 1330 nm RX

  • ✅ LC simplex optical connector

  • ✅ Supports up to 20 km reach on 9/125 µm SMF

  • ✅ Hot-pluggable SFP28 form factor (3.3 V)

  • ✅ Digital diagnostics (DDM) per SFF-8472

  • ✅ Power consumption < 1.5 W

  • ✅ Commercial temperature range: 0 °C to 70 °C

Specifications

 

Specification Details
Brand Sopto
Model / Series SPT-SFP28B3327-LRS + SPT-SFP28B2733-LRS
Module Type 25G Bi-Directional SFP28 Transceiver Pair
Data Rate 25 Gbps
Wavelengths B3327: 1330 nm TX / 1270 nm RX B2733: 1270 nm TX / 1330 nm RX
Fiber Type Single-mode fiber (9/125 µm)
Optical Interface Simplex LC
Maximum Reach 20 km
Digital Diagnostics Yes (DDM, SFF-8472)
Electrical Interface SFF-8402 (SFP28 MSA)
Power Supply 3.3 V DC
Power Consumption < 1.5 W
Hot-Pluggable Yes
Operating Temperature 0 °C to 70 °C
Storage Temperature –40 °C to +85 °C
Standards Compliance IEEE 802.3by, SFP28 MSA, SFF-8402, SFF-8472
Housing Metal casing with EMI shielding
Package Contents 1 × SPT-SFP28B3327-LRS 1 × SPT-SFP28B2733-LRS
Warranty 9 months

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