Replacement for QFX-QSFP-40G-ESR4: Drop-In Alternatives We Stock
Looking for a replacement for the QFX-QSFP-40G-ESR4 (QFX-QSFP-40G-ESR4 - Juniper 40Gbps 40GBase-ESR4 Multi-mode Fiber 300m 850nm MPO Connector QSFP+ Optical Transceiver Module)? Pro Disk Network ships Juniper 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 QFX-QSFP-40G-ESR4
| SKU | QFX-QSFP-40G-ESR4 |
|---|---|
| Product | QFX-QSFP-40G-ESR4 - Juniper 40Gbps 40GBase-ESR4 Multi-mode Fiber 300m 850nm MPO Connector QSFP+ Optical Transceiver Module |
| Current price | $244.21 |
| Stock status | In Stock |
| Detail page | View QFX-QSFP-40G-ESR4 › |
Drop-in replacements for QFX-QSFP-40G-ESR4
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.
QFX-QSFP-40G-ESR - Juniper 40Gbps 40GBase-ESR Multi-mode Fiber 300m 850nm MPO Connector QSFP+ Transceiver Module
SKU: QFX-QSFP-40G-ESR
Price: $731.28
QFX-QSFP-40G-SR4 - Juniper 40Gb/s 40GBase-SR4 850nm 150m QSFP+ Transceiver Module
SKU: QFX-QSFP-40G-SR4
Price: $68.42
QFX-QSFP-DAC-3M - Juniper Networks 3m 40G QSFP to QSFP Passive Direct Attached Copper Cable
SKU: QFX-QSFP-DAC-3M
Price: $194.74
QFX-QSFP-40G-LR4 - Juniper 40Gbps 40GBase-LR4 Single-mode Fiber 10km 1310nm Duplex LC Connector QSFP+ Transceiver Module
SKU: QFX-QSFP-40G-LR4
Price: $944.55
QFX-QSFP-40G-LRM4 - Juniper 40Gbps 40GBase-LR4 Single-mode Fiber 10km 1330nm MPO Connector QSFP+ Transceiver Module
SKU: QFX-QSFP-40G-LRM4
Price: $3,932.28
QFX-SFP-8GFC-SW - Juniper 8Gbps 8GBase-SR Multi-mode Fiber 300m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: QFX-SFP-8GFC-SW
Price: $147.86
QFX-SFP-10GE-SR - Juniper 10Gbps 10GBase-SR Multi-mode Fiber 300m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: QFX-SFP-10GE-SR
Price: $184.21
QFX-QSFP-DAC-1M - Juniper 1M 40Gb/s QSFP+ to QSFP+ 10 Gigabit Ethernet Direct Attach Copper Twinax Cable
SKU: QFX-QSFP-DAC-1M
Price: $184.21
JNP-QSFP-40G-LX4 - Juniper 40Gbps 40GBase-LX4 Multi-mode Fiber 150m 1330nm Duplex LC Connector QSFP+ Transceiver Module
SKU: JNP-QSFP-40G-LX4
Price: $2,384.21
SRX-QSFP-40G-SR4 - Juniper Compatible 40GBase-SR4 850nm QSFP+ Transceiver Module
SKU: SRX-QSFP-40G-SR4
Price: $200.00
QFX-SFP-10GE-USR - Juniper 10Gbps 10GBase-USR Multi-mode Fiber 100m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: QFX-SFP-10GE-USR
Price: $184.21
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.