Cisco 400GBASE Single-mode Fibre 500m 1310nm MPO-12 Connector QSFP-DD Transceiver Module – QDD-400G-DR4-S=

Cisco QDD-400G-DR4-S= 400G QSFP-DD Transceiver

Support next-generation 400GbE connectivity with the Cisco QDD-400G-DR4-S= QSFP-DD transceiver module. This exact equals-suffix variant is specified for 400GBASE operation over single-mode fibre with a 500m reach, 1310nm wavelength, and MPO-12 connector. Its QSFP-DD format and high-bandwidth interface make it relevant to data-center spine, leaf, and high-capacity interconnect designs that require a precise optical module. Confirm the host port, fiber assembly, connector, route length, and exact variant before installation.

Key Features

• 400GBASE optical connectivity
• QSFP-DD transceiver format
• Single-mode fibre support
• 500m listed reach
• 1310nm wavelength
• MPO-12 connector

Product Specifications

• Part Number: QDD-400G-DR4-S=
• Manufacturer: Cisco
• Interface Rate: 400GbE
• Fiber Type: Single-mode fibre
• Listed Reach: 500m
• Wavelength: 1310nm
• Connector: MPO-12
• Module Type: QSFP-DD transceiver
• Variant Identifier: Equals-suffix model

Use Cases

• Building 400GbE data-center interconnects
• Supporting high-capacity spine and leaf links
• Connecting compatible QSFP-DD equipment
• Replacing an exact Cisco 400G optical module

Compatibility

The QDD-400G-DR4-S= is intended for compatible equipment supporting 400GBASE QSFP-DD modules. Confirm the host port, single-mode fibre, MPO-12 assembly, 500m route, optical budget, and exact variant before installation.

Frequently Asked Questions

What interface rate is specified?

The module is listed with a 400GbE interface rate.

What connector does it use?

The product uses an MPO-12 connector.

What reach and wavelength are listed?

The optic lists a 500m reach and 1310nm wavelength.

The QDD-400G-DR4-S= gives data-center teams a precise 400GbE QSFP-DD option for compatible single-mode fiber systems. Verify the MPO-12 cabling and exact equals-suffix SKU before ordering so the module fits the high-speed link design. Selecting the correct Cisco optic supports cleaner 400G deployment planning and more reliable optical inventory.