Replacement for 3CB9LF20MM: Drop-In Alternatives We Stock
Looking for a replacement for the 3CB9LF20MM (3CB9LF20MM - 3Com CoreBuillder 4007 20-Ports 100Base-FX Fast Ethernet Switch)? 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 3CB9LF20MM
| SKU | 3CB9LF20MM |
|---|---|
| Product | 3CB9LF20MM - 3Com CoreBuillder 4007 20-Ports 100Base-FX Fast Ethernet Switch |
| Current price | $450.00 |
| Stock status | In Stock |
| Detail page | View 3CB9LF20MM › |
Drop-in replacements for 3CB9LF20MM
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.
HP J9625A#B2C 2620-24-PoE+ 24-Ports 10/100(PoE) with 2 Ethernet Ports, 2 SFP Ports Rack-Mountable Fast Ethernet Switch
SKU: J9625A-B2C
Price: $382.59
DES-3200-28P - D-Link xStack 28-Ports PoE Managed Fast Ethernet Switch 24 Ethernet Ports and 4 Combo Gigabit SFP Ports
SKU: DES-3200-28P
Price: $990.32
HPE J9138-60001 ProCurve 2520 Series 2520-24-PoE 24 x RJ-45 Ports PoE 10/100Base-TX + 2 x Combo Gigabit SFP (mini-GBIC) Ports + 2 x RJ-45 GE Ports Layer 3 Managed Rack-mountable Fast Ethernet Network
SKU: J9138-60001
Price: $121.05
HP J9138AACD ProCurve 2520 Series 2520-24-PoE 24 x RJ-45 Ports PoE 10/100Base-TX + 2 x Combo Gigabit SFP (mini-GBIC) Ports + 2 x RJ-45 GE Ports Layer 3 Managed Rack-mountable Fast Ethernet Network Swi
SKU: J9138AACD
Price: $121.05
J9536-61101 - HP Expansion Module - Ethernet, Fast Ethernet, Gigabit Ethernet - 10base-t, 100base-tx, 1000base-t - 20 Ports + 2 X Sfp+
SKU: J9536-61101
Price: $194.74
HPE J9626-61001 Aruba 2620 Series 2620-48 48 x RJ-45 Ports 10/100Base-TX + 2 x RJ-45 GE Ports + 2 x SFP(mini-GBIC) Slot Layer 3 Managed Rack-mountable Stackable Fast Ethernet Network Switch
SKU: J9626-61001
Price: $194.74
HPE J9626#ABA HP J9626#ABA Aruba 2620 Series 2620-48 48 x RJ-45 Ports 10/100Base-TX + 2 x RJ-45 GE Ports + 2 x SFP(mini-GBIC) Slot Layer 3 Managed Rack-mountable Stackable Fast Ethernet Network Switch
SKU: J9626#ABA
Price: $194.74
8H417 - Dell PowerConnect 2024 24 x Ports 10/100Base-T Fast Ethernet Rack-Mountable Ethernet Switch
SKU: 8H417
Price: $503.09
5X302 - Dell PowerConnect 2024 24 x Ports 10/100Base-T Fast Ethernet Rack-Mountable Ethernet Switch
SKU: 5X302
Price: $503.09
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.