Replacement for WS-C4840G: Drop-In Alternatives We Stock
Looking for a replacement for the WS-C4840G (WS-C4840G - Cisco Catalyst 4840G 40-Port 10/100Mb/s Fast Ethernet Layer 3 Switch)? 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 WS-C4840G
| SKU | WS-C4840G |
|---|---|
| Product | WS-C4840G - Cisco Catalyst 4840G 40-Port 10/100Mb/s Fast Ethernet Layer 3 Switch |
| Stock status | In Stock |
| Detail page | View WS-C4840G › |
Drop-in replacements for WS-C4840G
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.
WS-X4448-GB-RJ45 - Cisco Catalyst 4000 48-Port 48 x 10/100/1000Base-T + 1 x Expansion Slot Gigabit Ethernet Module
SKU: WS-X4448-GB-RJ45
Price: $120.92
WS-X6408-GBIC - Cisco Catalyst 6000 8-Port 1000Base-X Gigabit Ethernet Network Module
SKU: WS-X6408-GBIC
Price: $245.62
WS-U4504-FX-MT - Cisco Catalyst 4000 4-Port 100FX Uplink Daughter Card
SKU: WS-U4504-FX-MT
Price: $828.95
WS-X4640-CSFP-E - Cisco Catalyst 4500E Series 40 SFP/80 C-SFP Port 1000Base-X Module
SKU: WS-X4640-CSFP-E
Price: $1,896.89
WS-X4448-GB-SFP - Cisco Catalyst 4000 48-Port 48 x 10/100/1000Base-T + 1 x Expansion Slot Gigabit Ethernet Module
SKU: WS-X4448-GB-SFP
Price: $2,317.08
WS-X4448-GB-LX - Cisco Catalyst 4000 48-Port 48 x 10/100/1000Base-T + 1 x Expansion Slot Gigabit Ethernet Module
SKU: WS-X4448-GB-LX
Price: $4,915.86
PWR-C45-2800ACV-2 - Cisco 2800-Watts 200-240V Power Supply for Catalyst 4503-E / 4506-E / 4507R-E / 4510R-E / 4507R+E / 4510R+E
SKU: PWR-C45-2800ACV-2
Price: $127.83
Cisco PWR-C45-1000AC/2 100-240V Power Supply for Catalyst 4503 / 4504 / 4506 / 4507R
SKU: PWR-C45-1000AC-2
Price: $158.29
WS-G5484-RF - Cisco 1 x 1000Base-SX GBIC Interface Converter for Catalyst 4000 Series Switch
SKU: WS-G5484-RF
Price: $213.92
PWR-1400-AC - Cisco Power Supply Hot-Plug-in module AC 100-240V 1400-Watts For 7603 / 7603s, Catalyst 6503 / 6503e
SKU: PWR-1400-AC
Price: $291.79
PWR-C45-1400AC - Cisco 1400-Watts 100-240V Redundant Hot-Swappable Power Supply for Catalyst 4507R-e / 4506-e Switch
SKU: PWR-C45-1400AC
Price: $735.70
C9400-PWR-2100AC - Cisco Catalyst 9400 2100-Watts AC Power Supply
SKU: C9400-PWR-2100AC
Price: $2,222.91
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.