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Cisco / Cisco 400GDD interface modules and cables

Cisco QDD-400G-SR4.2-BD · Pluggable transceiver

P/N: QDD-400G-SR4.2-BD

Pluggable transceiver

Link transceiver; check both endpoints, connectors, media and reach. Max power consumption (W): 12 · Optical Connector: MPO-12 MMF UPC

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Cisco QDD-400G-SR4.2-BD · Pluggable transceiver — Specification schematic, not a product photograph or installation drawing.
Specification schematic, not a product photograph or installation drawing. Citadex Systems · Specification source
01 / Specifications
MPN / P/N
QDD-400G-SR4.2-BD
Manufacturer designation
QDD-400G-SR4.2-BD
Manufacturer description
400G QSFP-DD Transceiver, 400GBASE-SR4.2, MPO-12 MMF, 100m
Source protocol/rate designation (breakout rates are not summed)
400G; 400GBASE-SR4.2
Source connector/form-factor designations
QSFP-DD; MPO-12
Max power consumption (W)
12
Optical Connector
MPO-12 MMF UPC
Optical link conditions (one source row; align lists in order)
Nominal wavelength (nm)=850, 908; Cable type=MMF; Core size (microns)=50; Modal bandwidth=2000 (OM3) 4700 (OM4) 4700 (OM5); Cable distance=70m (OM3) 100m (OM4) 150m (OM5)
Selection limits
Confirm exact host model/port, software release, FEC and supported breakout using Cisco TMG Compatibility Matrix. Fiber reach depends on the listed fiber grade, connector polish, optical budget and operating mode. Matching form factor alone does not guarantee support.

Specification source: Cisco ↗
Checked against documentation: 16.10.2026

Reference catalogue for quotation requests. Availability, production status, condition, price, lead time and warranty are individually confirmed. A listed part number is not a stock claim.

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