Replacement for QSFP40SR4ST: Drop-In Alternatives We Stock
Looking for a replacement for the QSFP40SR4ST (QSFP40SR4ST - StarTech Msa Compliant 40 Gigabit Fiber 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 QSFP40SR4ST
| SKU | QSFP40SR4ST |
|---|---|
| Product | QSFP40SR4ST - StarTech Msa Compliant 40 Gigabit Fiber QSFP+ Transceiver Module |
| Current price | $138.95 |
| Stock status | In Stock |
| Detail page | View QSFP40SR4ST › |
Drop-in replacements for QSFP40SR4ST
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.
QSFP40LR4ST - StarTech Msa Compliant 40 Gigabit Fiber QSFP+ Transceiver Module
SKU: QSFP40LR4ST
Price: $294.74
SFP-1GB-DW48-40-ACC - Accortec 1Gb/s 1000Base-DWDM Single-mode Fiber 40km 1538.98nm LC Connector SFP Transceiver Module for MSA Compliant
SKU: SFP-1GB-DW48-40-ACC
Price: $3,681.41
SFP-1GB-DW26-40-ACC - Accortec 1Gb/s 1000Base-DWDM Single-mode Fiber 40km 1556.55nm LC Connector SFP Transceiver Module for MSA Compliant
SKU: SFP-1GB-DW26-40-ACC
Price: $3,681.42
C8R25A - HP MSA 2040 10Gb/S Short Wave iSCSI SFP+ Transceiver Module for MSA 2040
SKU: C8R25A
Price: $370.53
721000-001 - HP C8R25A 10Gb/s 10GBase-SW Multi-mode Fiber Short Wave 300m 850nm iSCSI LC Connector SFP+ Transceiver (4-Pack) for MSA 2040 Storage
SKU: 721000-001
Price: $318.32
C8R25SB - HP 10Gb/s 10GBase-SW Multi-mode Fiber Short Wave 300m 850nm iSCSI LC Connector SFP+ Transceiver (4-Pack) for MSA 2040 Storage
SKU: C8R25SB
Price: $492.63
SFPF1340C - StarTech 100Mbps Single-mode Fiber 40km 1310nm Wavelength LC Connector SFP Transceiver Module
SKU: SFPF1340C
Price: $107.96
SFPF1340C-A1 - StarTech 100Mbps Single-mode Fiber 40km 1310nm Wavelength LC Connector SFP Transceiver Module
SKU: SFPF1340C-A1
Price: $171.33
SFPG1340C-A1 - StarTech 1Gbps Single-mode Fiber 40km 1310nm Wavelength LC Connector SFP Transceiver Module
SKU: SFPG1340C-A1
Price: $280.75
SFPG1340C - StarTech 1Gbps Single-mode Fiber 40km 1310nm Wavelength LC Connector SFP Transceiver Module
SKU: SFPG1340C
Price: $285.13
218232-B21 - HP MSA 1000 6-Ports 2.40GHz Fiber Channel Network Switch Module for Modular Smart Array
SKU: 218232-B21
Price: $318.32
738369-001 - HP 1Gb/s Short-Wave ISCSI SFP Transceiver Module for MSA 2040 SAN Storage
SKU: 738369-001
Price: $96.84
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.