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Rectangular QSFP-DD transceiver module with two LC duplex ports and metallic finish

Cisco Systems, Inc.

Cisco Systems, Inc. QDD-400G-FR4-S= 400G QSFP-DD SFP transceiver 2 km

SKU CH-26T6-5W89T MPN QDD-400G-FR4-S=

A 400 Gbit/s QSFP-DD transceiver for 2 km single-mode fibre links using duplex LC connectors

  • Device TypeTransceiver
  • Form FactorQSFP-DD
  • Standards400GBase-FR4
  • Network MediaSingle-mode Fiber
  • Connectors2x LC Duplex
  • Max Distance2 km
  • 400 Gbit/s throughput for high-bandwidth applications
  • 2 km reach over single-mode fiber with LC duplex connectors
  • QSFP-DD form factor fits compatible Cisco switch ports
  • 1310 nm wavelength supports 400GBASE-FR4 standard
  • Compact 8.66 x 1.18 x 0.79 inch module saves rack space

Cisco 400G QSFP-DD transceiver

This Cisco QSFP-DD transceiver delivers 400 Gbit/s over single-mode fiber for data-center and enterprise networks. It targets infrastructure teams upgrading links to 400GBASE-FR4 with a reach of 2 km. The module uses dual LC duplex connectors and fits standard QSFP-DD cages on compatible Cisco switches.

Sustained 400 Gbit/s throughput over 2 km

The transceiver maintains line-rate 400 Gbit/s across the full 2 km distance on single-mode fiber at 1310 nm. It is designed for continuous operation in video streaming, virtualization and big data analytics workloads without throttling. Latency remains consistent under load, helping reduce the number of switches required in the fabric.

2 km reach on duplex single-mode fiber

The 2 km maximum distance on duplex SMF with LC connectors is the specification that determines fit for a given link. Shorter-reach or longer-reach requirements will need a different transceiver variant. Verify that your switch platform supports 400GBASE-FR4 before deployment.

Highlights

  • 400 Gbit/s throughput for high-bandwidth applications
  • 2 km reach over single-mode fiber with LC duplex connectors
  • QSFP-DD form factor fits compatible Cisco switch ports
  • 1310 nm wavelength supports 400GBASE-FR4 standard
  • Compact 8.66 x 1.18 x 0.79 inch module saves rack space

Specifications

BrandCISCO
ModelQDD-400G-FR4-S=
Part NumberQDD-400G-FR4-S=
Device TypeTransceiver
Form FactorQSFP-DD
Standards400GBase-FR4
Network MediaSingle-mode Fiber
Connectors2x LC Duplex
Max Distance2 km
Transfer Rate400 Gbit/s
Power Adapter1 x Cisco 400G QSFP-DD Cable and Transceiver Modules
Dimensions10.4" x 16.0" x 2.8"
Weight0.2 lbs
Package Contents1 x Cisco 400G QSFP-DD Cable and Transceiver Modules
Shipping weight0.14 kg
Package size220 × 30 × 20 mm

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