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Technical Data Sheet
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811546-B21 ✓ Verified by PartsTable
HPE · NIC ADAPTER
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

The HP 811546-B21 HPE ETHERNET 1GB 4-PORT 366T A Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 811546-B21 is a HPE networking component designed for high-speed data center interconnects and enterprise network infrastructure. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-662-5095, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
811546-B21
NSN: 5998-01-662-5095
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 1TCB3 — HEWLETT-PACKARD COMPANY (USA)
SPECIFICATIONS
Part Number811546-B21
ManufacturerHPE
Capacity1GB
NSN5998-01-662-5095
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 4-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN 811546-B21 MFR HPE HP 811546-B21 HPE ETHERNET 1GB 4-PORT 36
KEY FEATURES
•
1GB Capacity
TYPICAL APPLICATIONS
  • Data center top-of-rack switching
  • High-speed server interconnects (10G/25G/40G/100G)
  • Storage network fabric (iSCSI, FCoE)
  • Campus and branch network infrastructure
  • Firewall and security appliance connectivity
  • WAN edge and SD-WAN deployments
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESCIRCUIT CARD ASSEMBLY, ETHERNET GB, CU, 4X 366T
END ITEM IDENTIFICATIONENROUTE AUTOMATION MODERNIZATION (ERAM)
SPECIAL FEATURESCIRCUIT CARD ASSEMBLY, ETHERNET GB, CU, 4X 366T
END ITEM IDENTIFICATIONENROUTE AUTOMATION MODERNIZATION (ERAM)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
816551-001Compatible
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350)
compatible
811544-001Compatible
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350)
compatible
P18460-B21Compatible
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350) for DX Servers
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
P18460-B21SUBSTITUTE
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350)
HPE
811544-001SUBSTITUTE
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350)
HPE
816551-001SUBSTITUTE
HP NIC 366T 1GbE RJ-45 4-Port PCI-E-2.1x4 Ethernet Controller (Intel I350)
HPE
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FREQUENTLY ASKED QUESTIONS
What is 811546-B21?
811546-B21 is a HP 811546-B21 HPE ETHERNET 1GB 4-PORT 366T A Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 811546-B21 manufactured by HPE.
What parts can replace 811546-B21?
There are 3 known substitutes for 811546-B21: 816551-001, 811544-001, P18460-B21. Substitute compatibility should be verified for your specific system.
What is the NSN for 811546-B21?
811546-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-662-5095. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026