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by Arista
Product Line: Arista Networks QSFP-40G-SRBD
Product Type: Optical Transceiver
Original price $167.00 - Original price $564.00
Original price
$167.00 - $564.00
Current price $167.00
Title: Surplus

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Product Description

The QSFP-40G-SRBD is a 40GBase SR-BD transceiver with a dual-LC connector, designed for short-range data transmission over MMF with a maximum reach of 100m. It operates at a TX Wavelength of 850nm/900nm, supporting a data rate of 11.2 Gbps per channel, with an optical power budget of 7.0 dB. This module features DDM, operates on a single +3.3V power supply with a maximum power consumption of 3.5W, and is suitable for environments with a temperature range from 0°C to 70°C (standard) and -40°C to +85°C (industrial).

Key Feature for the QSFP-40G-SRBD

  • What is the TX Wavelength range for this transceiver?
    The TX Wavelength range is 850nm to 900nm.
  • How far can the transceiver reach when using MMF?
    It has a reach of up to 100m on Multi-Mode Fiber (MMF).
  • What data rate does this transceiver support?
    The transceiver supports a data rate of 11.2 Gbps per channel.
  • Is DDM available on this transceiver?
    Yes, Digital Diagnostic Monitoring (DDM) is supported.
  • What type of connector is used with this transceiver?
    The transceiver uses a Dual-LC connector type.
  • What is the optical power budget of the transceiver?
    The optical power budget is 7.0 dB.
  • What are the minimum and maximum TX power levels?
    TX power ranges from -4.00 dBm to +2.50 dBm.
  • At what temperature range is the transceiver operational?
    It operates within 0°C to 70°C for standard conditions and -40°C to +85°C for industrial conditions.
  • What is the power consumption of the device?
    The power consumption is 3.5 W.
  • How long does it take for the transceiver to power on?
    The power-on time for the transceiver is 100 ms.

Product Review

The Arista QSFP-40G-SRBD module offers a solid 40GBase SR-BD interface with a dual-LC connector, supporting multimode fiber (MMF) with a reach of up to 100m at the 850nm/900nm wavelength, suitable for short-range, high-density applications. Its optical power budget is well within the expected range for quality transmissions, providing a minimum and maximum TX power of -4.00 to +2.50 dBm and a RX power of -11.00 to +0.50 dBm, ensuring reliable connectivity. However, its operational temperature range is limited to 0°C to 70°C for standard conditions, which may not be sufficient for environments requiring industrial-grade specifications, despite its comprehensive power and data rate specifications.


The Arista QSFP-40G-SRBD is a high-performance, quad small form-factor pluggable module designed for 40GBASE applications across data centers and high-performance computing networks. This module is engineered to deliver high-speed data transmission over multimode fiber (MMF) with a dual-LC connector, facilitating efficient and reliable interconnectivity solutions. Operating on a wavelength spectrum of 850nm to 900nm, the Arista QSFP-40G-SRBD ensures optimal performance and compatibility with a wide range of optical networking equipment. It boasts a maximum reach of 100 meters, making it suitable for short-range, high-bandwidth connections. The module supports a 40GBase rate category with an SR-BD interface type, tailored for bandwidth-intensive applications requiring high throughput and low latency. Digital Diagnostic Monitoring (DDM) functionality is integrated within the module, enabling real-time tracking of system operations. This feature allows for the monitoring of critical parameters such as temperature, supply voltages, and laser bias current, ensuring the system's integrity and reliability. Key specifications include: -
  • Optical Power Budget: 7.0 dB,
  • Data Rate per Channel: 11.2 Gbps,
  • Power Consumption: 3.5 W.
The QSFP-40G-SRBD operates efficiently with a single +3.3V power supply, maintaining a supply current of 1000 mA. It demonstrates a power dissipation of 3.5 W, optimizing system performance while managing energy consumption effectively. The module's quick power-on time of 100 ms ensures rapid initialization and deployment in dynamic networking environments. Transmission power ranges from -4.00 to +2.50 dBm for transmitting signals, while receiving power capabilities span from -11.00 to +0.50 dBm, accommodating various operational demands and enhancing the module's versatility in different networking scenarios. The QSFP-40G-SRBD is designed to operate within a broad temperature spectrum. For standard environments, it functions within a range of 0°C to 70°C, whereas, for industrial applications, it withstands temperatures from -40°C to +85°C. This wide operating temperature range ensures reliability and performance stability in varied environmental conditions. Storage conditions are equally robust, with the module enduring storage temperatures from -40°C to 85°C, supporting a minimum supply voltage of -0.5V and a maximum of 4V. Relative humidity tolerance stands at 85%, ensuring the module's resilience in humid operating conditions. In summary, the Arista QSFP-40G-SRBD is a comprehensive solution for 40G networking requirements, offering high-speed data transmission, advanced monitoring capabilities, and a resilient design suited for various operational environments. Its technical specifications cater to the demands of modern data centers and high-performance computing networks, providing an efficient, reliable, and versatile networking solution.


Item NumberArista QSFP-40G-SRBD
Transmission Wavelengths850nm / 900nm
Maximum Distance100 meters
Fiber TypeMultimode Fiber
Speed Specification40GBase
Connection InterfaceSR-BD
Digital Diagnostic MonitoringSupported
End ConnectorLC Duplex
Optical Budget7.0 dB
Transmit Power Range-4.00 to +2.50 dBm
Receive Power Range-11.00 to +0.50 dBm
Operating Temperature Minimum0°C
Operating Temperature Maximum70°C
Extended Temperature Range-40°C to +85°C
Power InputSingle +3.3V
Lowest Storage Temperature-40°C
Highest Storage Temperature85°C
Minimum Voltage-0.5V
Maximum Voltage4V
Humidity Tolerance85%
Current Requirement1000 mA
Energy Dissipation3.5 W
Channel Data Rate11.2 Gbps
Energy Use3.5 W
Activation Duration100 ms

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