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by Arista
Product Line: Arista SFP Transceivers
Product Type: SFP-1G-LX
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Product Description

The SFP-1G-LX Arista is a hot-pluggable SFP module designed for 1.25Gb/s data links over a 10km distance on 9/125 micron singlemode fiber (SMF). It operates at a 1310 nm TX wavelength, supports Gigabit Ethernet and 1x Fiber Channel, and is compatible with LX interface type without DDM. This module is compliant with IEEE802.3Z, features a single +3.3V power supply, and operates within a temperature range of 0°C to 70°C, ensuring performance in various environments.

Key Feature for the SFP-1G-LX

  • What is the form factor of this SFP module?
  • The form factor is sfp, designed for high performance in compact spaces.
  • What wavelength does the SFP operate at?
  • The SFP operates at a TX Wavelength of 1310 nm, suitable for various optical links.
  • How far can the SFP module transmit data?
  • It can transmit data up to 10km on standard 9/125 micron singlemode fiber.
  • What type of cable is compatible with this SFP?
  • The compatible cable type is SMF, ensuring reliable long-distance transmission.
  • What speed does the SFP support?
  • Supports up to 1.25Gb/s data links, fitting for 1000 base rate category applications.
  • Is the SFP module hot-pluggable?
  • Yes, it features a hot-pluggable SFP footprint for easy installation and removal without powering down the system.
  • Does the SFP module support Digital Diagnostic Monitoring (DDM)?
  • No, DDM is not supported, focusing on core functionality and reliability.
  • What are the operating temperature ranges for the SFP module?
  • Standard operating temperatures range from 0°C to 70°C, with an industrial range from -40 to +85 °C.
  • Is the module compliant with international safety and environmental standards?
  • Yes, it's compliant with IEEE802.3Z, IEC60825-1 for eye safety, and RoHS for environmental safety.
  • Can this SFP module be used for Gigabit Ethernet applications?
  • Yes, it is suitable for Gigabit Ethernet, 1x Fiber Channel, and other optical links, offering versatile connectivity options.

Product Review

The Arista SFP-1G-LX module offers reliable connectivity for networks, supporting 1.25Gb/s data links over a 10km distance on standard 9/125 micron single-mode fiber, catering well to Gigabit Ethernet and fiber channel applications. However, the lack of Digital Diagnostic Monitoring (DDM) functionality might limit its use in environments where real-time monitoring of signal parameters is crucial. Its compliance with IEEE802.3Z, IEC60825-1 safety standards, and RoHS, along with a wide operating temperature range, make it a versatile choice for various networking requirements, though its performance in more demanding industrial settings may be constrained by the standard temperature version's limits.


The Arista SFP-1G-LX is a small form factor pluggable module designed for Gigabit Ethernet and 1x Fiber Channel applications. This module supports a data rate of up to 1.25Gb/s and is engineered for high-speed communication over single-mode fiber (SMF) with a reach of up to 10 kilometers. It operates at a transmission wavelength of 1310 nm, adhering to the LX interface type standard. This product is specifically crafted for networks that require long-distance, high-speed data transmission capabilities. One of the key features of the Arista SFP-1G-LX is its compatibility with the 1000BASE-LX rate category, ensuring it can seamlessly integrate into existing Gigabit Ethernet infrastructures. The module is hot-pluggable, facilitating easy installation and removal without disrupting the network. This feature is particularly beneficial for environments where network uptime is critical, and maintenance windows are limited. The Arista SFP-1G-LX is designed with safety and compliance in mind. It meets the requirements of the IEEE802.3Z standard and is Laser Class1 compliant as per IEC60825-1, ensuring the safety of those who handle and operate the network equipment. Additionally, it operates within a single +3.3V power supply and adheres to RoHS compliance, highlighting Arista's commitment to environmental sustainability. Notably, the module supports links on standard 9/125 micron single-mode fiber, providing a reliable medium for long-distance data transmission. It has a defined operating temperature range, from a minimum of 0°C to a maximum of 70°C under standard conditions, with an extended range from -40°C to +85°C for industrial applications. This wide temperature range ensures that the module can operate effectively in various environmental conditions, from office settings to industrial environments.
  • Hot-pluggable SFP Footprint allows for easy installation and maintenance.
  • Complies with IEEE802.3Z and IEC60825-1 standards, ensuring network safety and reliability.
  • Supports a wide operating temperature range, suitable for a variety of environmental conditions.
From a technical perspective, the Arista SFP-1G-LX module has specific electrical requirements to ensure optimal performance. The transmitter differential input voltage ranges from a minimum of 650mV to a maximum of 2000mV. Its supply current maximum is set at 250mA, and the Tx_Disable input voltage is below 0.8V for low state. On the receiver side, the differential output voltage can reach up to 2000mV, ensuring strong signal integrity and reliable data reception. In summary, the Arista SFP-1G-LX is a high-performance, reliable module for extending network reach over single-mode fiber. Its compliance with industry standards, safety design, and support for a broad operating temperature range make it a versatile choice for network administrators looking to enhance their data communication infrastructure. Whether for Gigabit Ethernet or fiber channel applications, this module offers a dependable solution for long-distance optical links.


Item NumberArista SFP-1G-LX
Module TypeSFP
Emission Wavelength1310 nm
Maximum Distance10km
Fiber TypeSingle-Mode Fiber
Speed Rating1 Gbps
Protocol SupportLX
Digital Diagnostic MonitoringNo
Data RateUp to 1.25 Gbps
Insertion TypeHot-pluggable
IEEE StandardCompliant with IEEE 802.3z
Laser SafetyLaser Class 1, IEC 60825-1 Compliant
Power Requirement3.3V
Environmental ComplianceRoHS
Max Transmission Distance10km on 9/125μm SMF
Min Operating Temperature0°C
Max Operating Temperature70°C
Extended Operating Temperature Range-40°C to +85°C
Usage ApplicationsGigabit Ethernet, Single Fiber Channel, Various Optical Links
Input Voltage for Transmit Disable - LowMaximum 0.8V
Current ConsumptionMaximum 250mA
Input Voltage Range for TransmitterMinimum 650mV, Maximum 2000mV
Output Voltage Range for ReceiverMaximum 2000mV

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