Replacement for 3C509B-COMBO: Drop-In Alternatives We Stock
Looking for a replacement for the 3C509B-COMBO (3C509B-COMBO - 3Com EtherLink III Combo 16-Bit 10Base-/10Base-T Ethernet Network Adapter)? 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 3C509B-COMBO
| SKU | 3C509B-COMBO |
|---|---|
| Product | 3C509B-COMBO - 3Com EtherLink III Combo 16-Bit 10Base-/10Base-T Ethernet Network Adapter |
| Current price | $138.80 |
| Stock status | In Stock |
| Detail page | View 3C509B-COMBO › |
Drop-in replacements for 3C509B-COMBO
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.
3C905BTX16 - HP PCi Ethernet Adapter 3c905b-tx Fast Etherlink Xl 10/100 03-0172-400 F
SKU: 3C905BTX16
Price: $241.45
0D162M - Dell PowerConnect 8024 24 x Ports 10GBase-T 10 Gigabit Ethernet Ethernet + 4 x Ports 10 Gigabit Ethernet SFP+ Switch
SKU: 0D162M
Price: $3,701.30
D162M - Dell PowerConnect 8024 24 x Ports 10GBase-T 10 Gigabit Ethernet Ethernet + 4 x Ports 10 Gigabit Ethernet SFP+ Switch
SKU: D162M
Price: $3,701.30
7V300F0 - Maxtor MaXLine III III 300 GB 3.5 Internal Hard Drive - SATA/300 - 7200 rpm - 16 MB Buffer
SKU: 7V300F0
Price: $211.00
7B250S0 - Maxtor MaXLine III III 250 GB 3.5 Internal Hard Drive - SATA/150 - 7200 rpm - 16 MB Buffer - Hot Swappable
SKU: 7B250S0
Price: $840.95
J8166A - HP ProCurve 5304XL-32G 28 x Ports 10/100/1000Base-T + 4 x SFP Combo Layer-4 Managed Stackable Gigabit Ethernet Network Switch
SKU: J8166A
Price: $368.42
448190-001 - HP ProLiant DL585 G5- 4x AMD Opteron Quad Core 8360 Se/2.5GHz 16GB Ram Combo 2x Gigabit Ethernet 4u Rack Server
SKU: 448190-001
Price: $771.70
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.