Replacement for 581204-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 581204-B21 (581204-B21 - HP NC550M PCI-Express x8 2-Port Flex-10 10GbE Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem)? Pro Disk Network ships HP 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 581204-B21
| SKU | 581204-B21 |
|---|---|
| Product | 581204-B21 - HP NC550M PCI-Express x8 2-Port Flex-10 10GbE Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem |
| Current price | $163.16 |
| Stock status | In Stock |
| Detail page | View 581204-B21 › |
Drop-in replacements for 581204-B21
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.
586445-001 - HP NC550M PCI-Express x8 2-Port Flex-10 10GbE Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem
SKU: 586445-001
Price: $163.16
NC542M - HP PCI-Express 2-Port Flex-10 10GBe Mezzanine Gigabit Ethernet Server Adapter for ProLiant c-Class BladeSystem
SKU: NC542M
Price: $291.79
581202-001 - HP NC550M PCI-Express x8 2-Port Flex-10 10GbE Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem
SKU: 581202-001
Price: $571.68
HP 467799-B21 NC532M Flex-10 2 x Ports 10GbE PCI-Express Mezzanine Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem
SKU: 467799-B21
Price: $170.53
HP 539933-001 NC542M Flex-10 2 x Ports 10GbE PCI-Express Mezzanine Gigabit Ethernet Server Adapter for ProLiant c-Class BladeSystem
SKU: 539933-001
Price: $173.68
NC552SFP - HP 10GB 2-Port Ethernet Server Adapter Network Adapter PCI-Express 2.0 X8 10 Gigabit Ethernet 2 Ports
SKU: NC552SFP
Price: $61.05
614202-B21 - HP Nc552SFP 10GB 2-Port Ethernet Server Adapter Network Adapter PCI-Express 2.0 X8 10 Gigabit Ethernet 2 Ports
SKU: 614202-B21
Price: $280.87
HP JH018A#ABB OfficeConnect 1420 24G 2SFP+ 24-Port 24 x 10/100/1000 + 2 x 1 Gigabit / 10 Gigabit SFP+ Gigabit Ethernet Unmanaged 1U Rack-mountable Network Switch
SKU: JH018A-ABB
Price: $712.64
HP JH018A#AC3 OfficeConnect 1420 24G 2SFP+ 24-Port 24 x 10/100/1000 + 2 x 1 Gigabit / 10 Gigabit SFP+ Gigabit Ethernet Unmanaged 1U Rack-mountable Network Switch
SKU: JH018A-AC3
Price: $712.64
HP JL316A#ABB Altoline 6921 48-Port 48 x 10 Gigabit Ethernet + 6 x 40 Gigabit Ethernet 1U Rack-mountable Layer 3 Switch
SKU: JL316A-ABB
Price: $8,157.89
HP JL317A#ABA Altoline 6921 48-Port 48 x 10 Gigabit Ethernet + 6 x 40 Gigabit Ethernet Rack-mountable Layer 3 Switch
SKU: JL317A-ABA
Price: $13,404.63
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.