Description
Applications
Specifications

◆ Description:

Miray’s GE-BX20-SM4931 Transceivers are a high performance, cost effective module which have a single LC optics interface. They are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA) and Digital diagnostics functions are available via the 2-wire serial bus specified in SFF-8472. The receiver section uses a PIN receiver and the transmitter uses a 1490 nm DFB laser, up to 14dB link budge ensure this module 1000Base-LX Ethernet 20km application.

Stable 1.25Gbps Single-Fiber Connectivity for Ethernet Networks
This 1000BASE-BX SFP BIDI transceiver is built to deliver dependable 1.25Gb/s data links over single-mode fiber, making it a practical choice for network switch deployments where fiber count and port efficiency matter. With a single LC connector and TX1490nm/RX1310nm wavelength pairing, it supports up to 20km transmission on 9/125 μm SMF, giving procurement teams and system integrators a reliable option for long-reach uplinks in an ethernet switch, network switch, or poe switch environment. The module’s compact hot-pluggable form factor also helps simplify installation and replacement in live systems, reducing downtime during maintenance while maintaining stable optical performance for day-to-day operations.

Built for Reliable Monitoring, Compatibility, and Operational Control
This sfp module follows SFF-8472 and supports digital diagnostics through a two-wire serial interface, allowing operators to monitor module status and link conditions more effectively in managed networks. It uses a 1490nm DFB laser transmitter and PIN receiver design, with a specified link budget that supports 1000Base-LX Ethernet 20km applications under the stated conditions. The module runs from a single +3.3V power supply and offers a maximum power draw of 1W, which makes it a practical fit for equipment design and inventory planning by optical transceiver manufacturers and OEM partners who need consistent electrical and optical characteristics across platform builds.

Practical Fit for Industrial Networks, Switch Platforms, and Scalable Deployment
Available in industrial, extended, and commercial temperature versions, this transceiver is well suited to demanding installations that may experience wider environmental variation, from factory floors to telecom rooms and outdoor enclosures. Its RoHS-compliant, lead-free design supports procurement requirements for regulated deployments, while the single-fiber BIDI architecture can help reduce fiber usage in projects where port density and cabling efficiency are priorities. For industrial ethernet switch manufacturers, top network switch manufacturers, distributors, and resellers, this module offers a dependable option for upgrade paths, spare parts stocking, and field replacement across compatible switch families and transceiver-based systems.

Key Advantages

Stable 1.25Gb/s Optics for Reliable Network Links
This sfp module supports up to 1.25Gb/s data links and uses a single LC interface to keep installation simple and consistent in an ethernet switch or network switch deployment. The 1490nm DFB transmitter and 1310nm PIN receiver are designed for dependable signal transmission over up to 20km of 9/125 μm SMF, which gives plant engineers and procurement teams a practical option for long-distance connections where stable performance matters more than short-term convenience.

Industrial Design That Simplifies Integration and Maintenance
With hot-pluggable operation, single +3.3V power supply, digital diagnostics compliant with SFF-8472, and RoHS compliant lead-free construction, this module supports easier monitoring and maintenance in equipment built by industrial ethernet switch manufacturers and optical transceiver manufacturers. Its available industrial, extended, and commercial temperature ranges help it remain suitable for controlled rooms and harsher installations, so system integrators can select one part for multiple deployment conditions with fewer compatibility concerns.

Use Scenarios

Factory Network Uplinks and Equipment Room Links
In a factory or plant equipment room, operators often need a stable optical link between an ethernet switch and remote network cabinets where copper cabling is not practical. This transceiver fits that role by providing 20km single-mode transmission with LC connectivity, which helps maintain a steady uplink for control traffic, monitoring systems, and segmented production networks. Its diagnostic function also supports faster fault checks when maintenance teams need to confirm module status without interrupting the entire line.

Access Networks for Managed Switch Deployments
In deployments built by top network switch manufacturers for campus or industrial access layers, a poe switch or aggregation network switch may need a long-reach optical port to connect a distant node, controller, or communications cabinet. This module suits that scenario because the 1000BASE-BX design provides a clear single-fiber connection path, while the hot-pluggable form factor makes replacement practical during service work. For distributors and integrators, that means a compact part that matches stable network expansion needs without adding unnecessary complexity.

FAQ

Q1. What network applications is this SFP module suitable for?
It is designed for 1.25Gb/s data links and ethernet switch deployments that require a single LC optical interface. With a 1490nm transmitter, 1310nm receiver, and up to 20km reach on 9/125 µm SMF, our module is well-suited for stable point-to-point optical links.

Q2. Is this transceiver compatible with standard system interfaces?
Yes, it follows the Small Form Factor Pluggable MSA and uses the SFF-8472 2-wire serial bus for digital diagnostics. Our sfp module also supports hot-pluggable installation and operates from a single +3.3V power supply, which helps simplify integration for system builders.

Q3. What monitoring and diagnostic functions are available?
The unit includes a monitoring interface compliant with SFF-8472, so operators can access digital diagnostics through the serial bus. We provide this feature to help maintenance teams check module status during use and support routine verification in managed network switch environments.

Q4. Can it be used in industrial environments?
The module is available in industrial, extended, and commercial operating temperature versions, ranging from -40°C to 85°C, -5°C to 85°C, or 0°C to 70°C. Our design is intended for applications where temperature tolerance and reliable optical transmission are important.

Q5. What materials and compliance details should procurement teams confirm?
It is RoHS compliant and lead free, with a maximum power rating of 1W. For procurement teams and optical transceiver manufacturers, we recommend confirming the temperature version and link-distance requirement before deployment so our module matches the system specification.

Applications

1000Base-ZX Ethernet
Metro/Access Networks
1×FibreChannel
Other Optical Links

Applications

1000Base-ZX Ethernet
Metro/Access Networks
1×FibreChannel
Other Optical Links

Specifications

Part Number:	GE-BX40-SM3149	Vendor Name:	Miray
Form Factor:	SFP	Data Rate:	1.25Gbps
Wavelength:	1310nm-TX/1490nm-RX	Distance:	40km
Connector:	LC Simplex	Cable Type:	OS2 SMF
Transmitter:	DFB	Receiver Type:	PIN
TX Power:	-5~0dBm	Receiver Sensitivity:	<-23dBm
Power Consumption:	<1W	Modulation Format:	NRZ
DDM:	Support	Bit Error Ratio (BER):	10^-12
Protocols:	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant, SFF-8472	Warranty:	5 Years

Specifications

Part Number:	GE-BX20-SM4931	Vendor Name:	Miray
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	TX1490nm/RX 1310nm	Max Cable Distance	20km
Media	SMF	Connector	Simplex LC
Transmitter Type	DFB BiDi	Receiver Type	PIN
TX Power	-9~-3dBm	Receiver Sensitivity	<-22dBm
Electrical Modulation	1.25Gb/s NRZ	Optical Modulation	1.25Gb/s NRZ
Power Consumption	≤1.0W	CBit Error Ratio(BER)	10^-12
Temperature Range	0 to 70℃(32 to 158°F)	Operating Relative Humidity	5%～85%
Protocols	Gigabit Ethernet,Gigabit Fibre Channel,MSA Compliant	Main application environments	Gigabit Ethernet Switches and Routers,Fiber Channel Switch Infrastructure,Other Optical Links

1.25Gbps 1000BASE-BX SFP BIDI TX1490nm/RX1310nm 20km DOM LC SMF Transceiver Module

Description

Applications

Specifications

Applications

Applications

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