Replacement for CRS-MSC-40G-B: Drop-In Alternatives We Stock
Looking for a replacement for the CRS-MSC-40G-B (CRS-MSC-40G-B - Cisco Modular Services Card 40)? 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 CRS-MSC-40G-B
| SKU | CRS-MSC-40G-B |
|---|---|
| Product | CRS-MSC-40G-B - Cisco Modular Services Card 40 |
| Stock status | In Stock |
| Detail page | View CRS-MSC-40G-B › |
Drop-in replacements for CRS-MSC-40G-B
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.
MA-CBL-40G-1M - Cisco 1M Compatible 40G QSFP+ Direct Attach Copper Cable
SKU: MA-CBL-40G-1M
Price: $168.45
UCSB-MLOM-40G-01 - Cisco UCS 1240 4-Port 10GB Virtual Interface Card
SKU: UCSB-MLOM-40G-01
Price: $206.32
UCSB-MLOM-40G-03 - Cisco UCS Virtual Interface Card 1340 Network Adapter
SKU: UCSB-MLOM-40G-03
Price: $211.00
Cisco Services SPA Carrier 400 - Expansion module - for Cisco 7603, 7604, 7606, 7609, 7613; Catalyst 6503
SKU: 7600-SSC-400
Price: $232.82
Cisco QSFP-40G-SR4 40Gb/s 40GBase-SR4 Multi-Mode Fiber 150m 850nm MPO Connector QSFP+ Transceiver Module Spare
SKU: QSFP-40G-SR4
Price: $63.14
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
Cisco FET-40G 40Gb/s 40GBase-SR4 Multi-Mode 150m 850nm MPO QSFP+ Transceiver Module Spare
SKU: FET-40G
Price: $140.36
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
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.