Replacement for 40GB-LR4-QSFP: Drop-In Alternatives We Stock
Looking for a replacement for the 40GB-LR4-QSFP (40GB-LR4-QSFP - Enterasys 40Gbps Single-mode 10km LC Duplex Connector QSFP+ Transceiver Module)? Pro Disk Network ships 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 40GB-LR4-QSFP
| SKU | 40GB-LR4-QSFP |
|---|---|
| Product | 40GB-LR4-QSFP - Enterasys 40Gbps Single-mode 10km LC Duplex Connector QSFP+ Transceiver Module |
| Stock status | In Stock |
| Detail page | View 40GB-LR4-QSFP › |
Drop-in replacements for 40GB-LR4-QSFP
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.
40GB-LR4-QSFP-ACC - Accortec 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: 40GB-LR4-QSFP-ACC
Price: $2,113.26
40GB-LR4-QSFP-G - Enterasys 40Gbps 40GBase-LR4 Single-Mode Fibre 10km LC Connector QSFP+ Transceiver Module
SKU: 40GB-LR4-QSFP-G
Price: $11,739.83
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-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
40G-QSFP-LR4 - Brocade 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: 40G-QSFP-LR4
Price: $2,132.41
QSFP-40G-LR-ACC - Accortec 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module with DOM for Alcatel-Lucent Compatible
SKU: QSFP-40G-LR-ACC
Price: $2,397.51
QSFP-LR4-ACC - Accortec 40Gb/s 40GBase-LR4 Single-mode Fiber 10km 1331nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-LR4-ACC
Price: $2,643.47
QSFP-40GBASE-LR4-ACC - Accortec 40Gb/s 40GBase-LR4 Single-mode Fiber 10km 1330nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QSFP-40GBASE-LR4-ACC
Price: $2,643.51
40G-QSFP-LR4-INT - Brocade 40Gb/s 40GBase-LR4 Single-Mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: 40G-QSFP-LR4-INT
Price: $4,267.71
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
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.