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by Cisco
Product Line: Cisco CFP transceiver modules
Product Type: CFP40GSR4 transceiver module
Original price $529.00 - Original price $787.00
Original price
$529.00 - $787.00
Current price $787.00
Title: Surplus

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Product Description

The CFP-40G-SR4 Cisco module operates at a wavelength of 850 nm, supporting link lengths up to 100 m on OM3 and 150 m on OM4 Multimode Fiber (MMF) with a core size of 50 microns. It adheres to the IEEE 40GBASE-SR4 standard, with a power consumption of up to 8 W per 40 G CFP port and operates within an operating temperature range of 0 to 70°C. The module's transmit power ranges from -7.6 dBM to 2.4 dBM per lane, while its receive power spans -9.5 dBm to 2.4 dBm per lane, ensuring compatibility and performance across various networking environments.

Key Feature for the CFP40GSR4

  • What is the maximum cable distance supported by this networking hardware?
    The hardware supports cable distances of 30 m, 100 m, and 150 m over laser-optimized OM3 and OM4 multimode fiber cables.
  • How does the part's operating temperature range support its functionality?
    It operates within a temperature range of 0 to 70°C, ensuring reliability under various environmental conditions.
  • What type of fiber is required for this device?
    The device requires MMF (Multimode Fiber) with a core size of 50 microns.
  • Can you detail the power consumption for this 40 G CFP port?
    Power consumption reaches up to 8 W per 40 G CFP port.
  • What are the maximum and minimum transmit power levels?
    Maximum transmit power is 2.4 dBM per lane, while minimum transmit power is -7.6 dBM per lane.
  • Is this product suitable for use in a wide range of environmental conditions?
    Yes, with a storage temperature range of -40 to 85°C, it's designed for diverse environmental conditions.
  • What wavelength range does the transmitter support?
    The transmitter supports a wavelength range from 840 nm to 860 nm.
  • What standards does this networking hardware comply with?
    It supports the IEEE 40GBASE-SR4 standard.
  • What is the weight of this networking hardware?
    It weighs less than or equal to 300 g.
  • How does the hardware ensure signal integrity across its operating range?
    With maximum receive power of 2.4 dBM per lane and minimum receive power of -9.5 dBM per lane, it maintains signal integrity across various distances and conditions.

Product Review

The Cisco CFP-40G-SR4 module supports a wide range of link lengths, up to 100m on OM3 and 150m on OM4 multimode fiber cables, making it versatile for various network setups. However, its power consumption of up to 8W per port may be higher compared to similar modules, potentially impacting energy efficiency in large-scale deployments. Additionally, the module operates within a broad temperature range, ensuring reliability under varying environmental conditions.


The Cisco CFP-40G-SR4 is a high-performance, 40 Gigabit Ethernet transceiver module designed for high-bandwidth data transmission over multimode fiber (MMF). It is optimized for short-range data communication and data center connectivity. This module is compliant with the IEEE 40GBASE-SR4 standard and operates on the principle of parallel optical interconnects, where data transmission is achieved over four lanes. Key specifications of the Cisco CFP-40G-SR4 include support for link lengths up to 100 meters and 150 meters over laser-optimized OM3 and OM4 multimode fiber cables, respectively. The module operates at a nominal wavelength of 850 nm, making it suitable for use with a wide range of optical networking equipment. The core size of the multimode fiber used is 50 microns, which is standard for high-speed data transmission.
  • Cable distance support includes 30 m, 100 m, and 150 m, accommodating various deployment scenarios from within data centers to interconnecting data center floors.
  • The transceiver's power metrics include a maximum transmit power of 2.4 dBm per lane and a minimum transmit power of -7.6 dBm per lane. For receiving, it can handle a maximum of 2.4 dBm per lane and a minimum of -9.5 dBm per lane.
  • It maintains operational efficiency with power consumption up to 8 W per 40 G CFP port and a weight of less than or equal to 300 g, ensuring it does not significantly impact the power budget or physical infrastructure of networking equipment.
The operating temperature range of the Cisco CFP-40G-SR4 is from 0 to 70°C, with a storage temperature range from -40 to 85°C, indicating its resilience in various environmental conditions. These temperature ranges ensure that the module can perform reliably in a broad spectrum of data center environments. In terms of optical characteristics, the transceiver supports a minimum transmitter wavelength of 840 nm and a maximum transmitter wavelength of 860 nm. This wavelength range is ideal for short-range multimode fiber applications, providing flexibility in the types of optical fibers that can be used with the module. The Cisco CFP-40G-SR4 is designed to meet the needs of high-speed networking applications, offering a solution that combines high data throughput with the reliability and quality expected from Cisco products. Its support for the IEEE 40GBASE-SR4 standard ensures interoperability with a wide array of networking equipment, facilitating easy integration into existing network infrastructures. In summary, the Cisco CFP-40G-SR4 is a versatile and efficient solution for extending the reach of high-speed network connections within data centers and similar environments. Its technical specifications, including support for various cable distances, power efficiency, and temperature resilience, make it a compelling choice for network administrators seeking to enhance their data communication capabilities.


Item NumberCisco CFP-40G-SR4
Maximum Cable LengthsUp to 100m and 150m on OM3 and OM4 Laser-Optimized Multimode Fibers
Emission Wavelength850 nm
Fiber CategoryMMF
Diameter of Core50 Micrometers
Transmission Distance30m, 100m, 150m
Highest Output Power2.4 dBm Each Channel
Lowest Output Power-7.6 dBm Each Channel
Highest Input Power2.4 dBm Each Channel
Lowest Input Power-9.5 dBm Each Channel
Operational Temperature Range0°C to 70°C
Temperatures for Storage-40°C to 85°C
Energy UseMaximum of 8W for each 40G CFP Slot
Mass≤ 300 grams
Compatibility StandardIEEE 40GBASE-SR4
Transmitter's Minimum Wavelength840 nm
Transmitter's Maximum Wavelength860 nm

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