QSFP-40G-CSR4 - QSFP+, 40Gbps, 40GBASE-CSR4, MMF, 850nm, 400M

QSFP-40G-CSR4 - QSFP+, 40Gbps, 40GBASE-CSR4, MMF, 850nm, 400M

Product #: QSFP-40G-CSR4
Availability: In Stock
Leadtime: Usually ships in 2 days
Warranty: Lifetime
Price: $600.00
* Compatibility (Input the equipment you will use the item with):

The 40GBASE QSFP+ (Quad Small Form-Factor Pluggable Plus) modules offer customers a wide variety of high-density 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider transport applications.


The 40GBASE-CSR4 QSFP+ Module is similar to the 40GBASE-SR4 interface extends supported link lengths to 300m and 400m respectively on laser-optimized OM3 and OM4 multimode fiber cables. Each 10-gigabit lane of this module is compliant to IEEE 10GBASE-SR specifications. This module can be used for native 40G optical links over 12-fiber ribbon cables with MPO/MTP connectors, or in 4x10G mode with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. Maximum channel insertion loss allowed is respectively 2.6dB over 300m of OM3 cable or 2.9dB over 400m of OM4 cable.



  • Support for 40GBASE Ethernet
  • Hot-swappable input/output device that plugs into a 40-Gigabit Ethernet QSFP+ Cisco switch port
  • Flexibility of interface choice
  • Interoperable with other IEEE-compliant 40GBASE interfaces available in various form factors
  • Support for "pay-as-you-populate" model
  • Transmitter wavelength 850nm.
  • Industry-standard MPO connector.
  • Multimode Fibre (MMF).
  • Digital Optical Monitoring (DOM).



  • Form Factor: QSFP+
  • Data Rate: 41.2Gbps
  • Wavelength: 4 lanes, 840nm to 860nm
  • Distance: 400 meters
  • Operating Temperature Range: Commercial 0°C to 70°C
  • Storage Temperature Rrange: -40 to 85°C
  • Digital Diagnostics (DDM): Yes
  • Fiber Type: Multi-Mode Fiber (MMF)
  • Connector: 12-fiber MPO/MTP
  • Hot Swappable: Yes
  • Application: 40 Gigabit Ethernet Compliant
  • Dimensions: 0.33" x 0.72" x 2.4"


  • GR-20-CORE: Generic Requirements for Optical Fiber and Optical Fiber Cable
  • GR-326-CORE: Generic Requirements for Single-Mode Optical Connectors and Jumper Assemblies
  • GR-1435-CORE: Generic Requirements for Multifiber Optical Connectors
  • IEEE 802.3ba (-SR4, -LR4)
  • IEEE 802.3ae (-CSR4)
  • QSFP+ MSA SFF-8436
  • SFP+ MSA SFF-8431 and -8461
  • RoHS 6



  • Laser Class 1M per IEC60825-1 and CFR 21Section 1040
  • Cable jacket of QSFP+ copper modules is UL #E116441 Compliant

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