Replacement for QDD-400G-DR4-S: Drop-In Alternatives We Stock
Looking for a replacement for the QDD-400G-DR4-S (QDD-400G-DR4-S - Cisco 500m 1310nm 400GBASE-DR4 MTP/MPO Single-mode QSFP-DD Transceiver Module)? Pro Disk Network ships Cisco drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the QDD-400G-DR4-S
| SKU | QDD-400G-DR4-S |
|---|---|
| Product | QDD-400G-DR4-S - Cisco 500m 1310nm 400GBASE-DR4 MTP/MPO Single-mode QSFP-DD Transceiver Module |
| Stock status | In Stock |
| Detail page | View QDD-400G-DR4-S › |
Drop-in replacements for QDD-400G-DR4-S
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
CPAK-10X10G-LR - Cisco Single-Mode 10Gbps 10GBase-LR Fiber 10km 1310nm MTP/MPO Connector CPAK Transceiver Module
SKU: CPAK-10X10G-LR
Price: $642.11
CPAK-10X10G-LR-RF - Cisco Single-Mode 10Gbps 10GBase-LR Fiber 10km 1310nm MTP/MPO Connector CPAK Transceiver Module
SKU: CPAK-10X10G-LR-RF
Price: $642.11
QSFP-4X10G-LR-S - Cisco Single-Mode 40Gbps 10GBase-LR Fiber 10km 1310nm MTP/MPO Connector QSFP+ Transceiver Module
SKU: QSFP-4X10G-LR-S
Price: $1,986.01
QSFP-100G-PSM4-S - Cisco Single-Mode 100Gbps 100GBase-PSM4 Fiber 500m 1310nm MPO-12 Connector QSFP Transceiver Module
SKU: QSFP-100G-PSM4-S
Price: $1,645.93
10-2672-01 - Cisco Multi-mode QSFP-40G-SR4 850nm 150m 40Gb/s Fiber MTP/MPO QSFP+ Transceiver Module
SKU: 10-2672-01
Price: $79.66
ONS-CXP-100G-SR10 - Cisco 100Gb/s 100GBase-SR10 Multi-Mode Fiber 100m 850nm MTP/MPO Connector CXP Transceiver Module
SKU: ONS-CXP-100G-SR10
Price: $113.36
QSFP-40G-CSR4 - Cisco 40Gb/s 40GBase-CSR4 Multi-Mode Fiber 400m 850nm MTP/MPO Connector QSFP+ Transceiver Module
SKU: QSFP-40G-CSR4
Price: $140.36
Cisco QSFP-40G-SR4-S Multi-Mode 40Gbps 40GBase-SR4 Fiber 150m 850nm MTP/MPO Connector QSFP+ Transceiver Module
SKU: QSFP-40G-SR4-S
Price: $164.11
QSFP-40G-SR4-S-RF - Cisco Multi-Mode 40Gbps 40GBase-SR4 Fiber 150m 850nm MTP/MPO Connector QSFP+ Transceiver Module
SKU: QSFP-40G-SR4-S-RF
Price: $232.84
CPAK-100G-SR10 - Cisco 100Gb/s 100GBase-SR10 Multi-Mode Fiber 100m 850nm MPO/MTP Connector CPAK Transceiver Module
SKU: CPAK-100G-SR10
Price: $414.45
CFP-100G-SR10-RF - Cisco Multi-mode 100Gbps 100GBase-SR10 Fiber 150m 850nm MTP/MPO Connector CFP Transceiver Module
SKU: CFP-100G-SR10-RF
Price: $491.22
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.