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by Arista
Product Line: Arista QSFP40 Series
Product Type: QSFP (Quad Small Form-factor Pluggable) transceiver
Original price $156.00 - Original price $629.00
Original price
$156.00 - $629.00
Current price $629.00
Title: Surplus

Orders typically ship within 1-3 Business days, if you need an item to ship sooner please contact us.

Product Description

The QSFP-40G-XSR4 Arista operates at a wavelength of 850nm, with a 40 Gbps maximum data transfer rate over multi-mode fiber, utilizing an MPO connection type for up to 400m (1312 ft.) transfer distance. It features Digital Diagnostics Monitoring (DDM) for enhanced operational insight, while maintaining low power consumption within a compact design measuring 0.7 in [1.9 cm] in length, 4.8 in [12.2 cm] in width, and 0.3 in [8.5 mm] in height, and weighing 1.3 oz [37.5 g]. Designed for full-duplex 40 Gbps networks, it supports a broad range of operating conditions, including case temperatures from -40 C to 85 C (industrial) and humidity levels from 0% to 85% non-condensing, ensuring reliability with an MTBF of 244,610,583 hours.

Key Feature for the QSFP40GXSR4

  • What is the wavelength specification of this networking hardware?
    The wavelength is 850nm.
  • How fast can data be transferred using this device?
    The maximum data transfer rate is 40 Gbps.
  • What type of fiber mode does this product support?
    It supports Multi Mode.
  • What type of connector is used for this product?
    The connection type is MPO.
  • What is the maximum transfer distance supported by this hardware?
    The maximum transfer distance is 400m (1312 ft).
  • What is the mean time between failures (MTBF) for this device?
    The MTBF is 244,610,583 hours.
  • Does this product feature Digital Diagnostics Monitoring (DDM)?
    Yes, it includes Digital Diagnostics Monitoring (DDM).
  • What are the physical dimensions of this product?
    The product measures 0.7 in [1.9 cm] in length, 4.8 in [12.2 cm] in width, and 0.3 in [8.5 mm] in height.
  • How much does this networking hardware weigh?
    The weight of the product is 1.3 oz [37.5 g].
  • Is this product compatible with 40 Gbps networks?
    Yes, it is compatible with 40 Gbps networks.

Product Review

The Arista QSFP-40G-XSR4 module offers a maximum data transfer rate of 40 Gbps over a multi-mode fiber, with a maximum transfer distance of 400m, suitable for large-scale data centers requiring high-speed connections. It features a low power consumption and supports Digital Diagnostics Monitoring (DDM), enhancing operational efficiency and network management capabilities. However, its reliance on MPO connection type may limit compatibility with existing network infrastructure not equipped for MPO interfaces, potentially necessitating additional investments in compatible hardware.


The Arista QSFP-40G-XSR4 is a high-performance, quad small form-factor pluggable transceiver designed for 40 Gigabit Ethernet applications. This transceiver uses an 850nm wavelength for data transmission and supports a maximum data transfer rate of 40 Gbps, making it suitable for high-speed networking requirements. It is built for multi-mode fiber, ensuring compatibility with a broad range of network infrastructure. This product features an MPO connector type, designed for easy and secure connection to network equipment. It boasts an impressive maximum transfer distance of up to 400 meters (1312 feet), facilitating reliable long-distance communication without signal degradation. The QSFP-40G-XSR4 is engineered for full-duplex fiber operation, allowing simultaneous transmission of data in both directions, which enhances the efficiency of data flow in network environments. One of the key strengths of the Arista QSFP-40G-XSR4 is its exceptional reliability, with a mean time between failures (MTBF) of 244,610,583 hours, indicating a low likelihood of failure over its operational lifespan. Additionally, it features low power consumption, which not only reduces operational costs but also minimizes the environmental impact of networking activities. Digital Diagnostics Monitoring (DDM) is supported, enabling real-time tracking of the module's operational parameters such as temperature, voltage, and optical power levels. This functionality assists network administrators in proactive maintenance and troubleshooting, ensuring optimal performance and longevity of the module. The physical dimensions of the QSFP-40G-XSR4 are compact, with a length of 0.7 inches [1.9 cm], a width of 4.8 inches [12.2 cm], and a height of 0.3 inches [8.5 mm], and it weighs 1.3 oz [37.5 g]. This small footprint allows for high-density installations in data centers and networking closets, maximizing space utilization while minimizing clutter.
  • Compatible with 40 Gbps networks, ensuring high-speed connectivity and efficient data transfer across enterprise and data center environments.
  • Designed for operation in a wide range of environmental conditions, with operating case temperatures ranging from 0°C to 70°C (standard) and -40°C to 85°C (industrial).
  • Supports a broad range of operating conditions, including a storage temperature range of -40°C to 85°C, power supply voltage range of -0.5 V to 3.6 V, and relative humidity range of 0% to 85% (non-condensing).
In summary, the Arista QSFP-40G-XSR4 transceiver is an efficient, reliable solution for 40 Gigabit Ethernet networking. It offers a blend of high data transfer rates, long-distance connectivity, low power consumption, and advanced diagnostics monitoring, all packed into a compact, durable design. Whether deploying in enterprise networks, data centers, or industrial settings, the QSFP-40G-XSR4 meets the demands of modern high-speed networking environments.


Part Number Arista QSFP-40G-XSR4
Producer Arista
Optical Wavelength 850 nanometers
Peak Data Rate 40 Gigabits per second
Fiber Type Multi-Mode
Connector Style MPO
Max Transmission Range 400 meters (1312 feet)
Mean Time Between Failures 244,610,583 hours
Energy Use Low
DDM Support Supported
Length 0.7 inches [1.9 cm]
Width 4.8 inches [12.2 cm]
Height 0.3 inches [8.5 mm]
Mass 1.3 ounces [37.5 grams]
Transmission Mode Full Duplex
Network Compatibility 40 Gigabit Ethernet
Lowest Storage Temp -40 °C
Highest Storage Temp 85 °C
Minimum Supply Voltage -0.5 Volts
Maximum Supply Voltage 3.6 Volts
Lowest Humidity (non-condensing) 0%
Highest Humidity (non-condensing) 85%
Minimum Case Temperature (Standard) 0 °C
Maximum Case Temperature (Standard) 70 °C
Minimum Case Temperature (Industrial) -40 °C
Maximum Case Temperature (Industrial) 85 °C

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