Replacement for QSFP-40G-LR4-RF: Drop-In Alternatives We Stock
Looking for a replacement for the QSFP-40G-LR4-RF (QSFP-40G-LR4-RF - Cisco Single-mode 40Gbps 40GBase-LR4 Fiber 10km 1310nm Duplex LC Connector QSFP+ 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 QSFP-40G-LR4-RF
| SKU | QSFP-40G-LR4-RF |
|---|---|
| Product | QSFP-40G-LR4-RF - Cisco Single-mode 40Gbps 40GBase-LR4 Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module |
| Current price | $1,071.76 |
| Stock status | In Stock |
| Detail page | View QSFP-40G-LR4-RF › |
Drop-in replacements for QSFP-40G-LR4-RF
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.
QSFP-40G-LR4-S - Cisco 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40G-LR4-S
Price: $839.17
QSFP-40G-LR4-S-RF - Cisco 40Gbps 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40G-LR4-S-RF
Price: $1,785.45
MA-QSFP-40G-LR4 - Cisco Meraki Single-mode 40Gbps 40GBase-LR4 Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: MA-QSFP-40G-LR4
Price: $2,785.50
QSFP-40G-LR - Cisco 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40G-LR
Price: $5,538.72
Cisco QSFP-40G-ER4 Single-mode 40Gbps 40GBase-ER4 Fiber 40km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40G-ER4
Price: $309.89
QSFP-40G-ER4-ACC - Accortec 40Gb/s 40GBase-ER4 Single-Mode Fiber 40km 1310nm Duplex LC Connector QSFP+ Transceiver Module for Cisco Compatible
SKU: QSFP-40G-ER4-ACC
Price: $5,941.26
QSFP-40GE-LR4 - Cisco 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40GE-LR4
Price: $1,071.76
QSFP-40GE-LR4-RF - Cisco 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40GE-LR4-RF
Price: $1,071.76
QSFP-40GE-LR4-S - Cisco 40Gbps 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40GE-LR4-S
Price: $1,418.79
QSFP-100G-LR4-S - Cisco 100Gb/s 100GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP Transceiver Module
SKU: QSFP-100G-LR4-S
Price: $1,789.47
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.