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PartsTable / NETWORK / 647586-B21
647586-B21 ✓ Verified by PartsTable
HP · NETWORK · 10GBE_NIC
WHAT YOU NEED TO KNOW
RJ45 = copper (needs CAT6) | SFP+ = fiber (needs transceiver) FLR = FlexibleLOM (HPE integrated) — NOT standard PCIe
Bracket height MUST match chassis — Full Height (2U) vs Low Profile (1U)
PRODUCT OVERVIEW
HP FLEX FABRIC 10GB 2-PORT 554FLB ADAPTER

HP FLEX FABRIC 10GB 2-PORT 554FLB ADAPTER. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
NETWORK→ 10GBE_NIC→ 647586-B21
SPECIFICATIONS
Part Number647586-B21
ManufacturerHP
Capacity10GB
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN 647586-B21 MFR HP HP Flex Fabric 10GB 2-Port 554FLB Adapte
KEY FEATURES
•
10GB Capacity
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
649940-001Compatible
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3)
compatible
647584-001Compatible
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3)
compatible
684212-B21Compatible
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3) FIO
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
647584-001SUBSTITUTE
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3)
HPE
649940-001SUBSTITUTE
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3)
HPE
684212-B21SUBSTITUTE
HP NIC 554FLB 10GbE 2-Port PCI-E-2.0x8 Flex-10 FlexFabric BL-c FlexibleLOM (Emulex BE3)
HPE
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FREQUENTLY ASKED QUESTIONS
What is 647586-B21?
647586-B21 is a HP Flex Fabric 10GB 2-Port 554FLB Adapter manufactured by HP. It is classified as a NETWORK (10GBE_NIC).
What parts can replace 647586-B21?
There are 3 known substitutes for 647586-B21: 649940-001, 647584-001, 684212-B21. Substitute compatibility should be verified for your specific system.
Is 647586-B21 still available?
647586-B21 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026