What type of product is the HPE P51181-B21 adapter?

The P51181-B21 is a Hewlett Packard Enterprise network adapter described as the Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter for HPE. It is categorized as an OCP 3.0 Ethernet adapter with 1Gb 4-port BASE-T connectivity at the enterprise product level.

How many Ethernet ports does the P51181-B21 provide?

This adapter is listed as a 1Gb 4-port BASE-T solution. That means it offers four Ethernet ports on a single Broadcom BCM5719-based card, enabling multiple 1Gb connections from one adapter within an HPE server.

What interface standard does this adapter use?

The adapter is categorized under OCP 3.0 Ethernet Adapter, indicating that it is designed for OCP 3.0 slots. This OCP 3.0 form factor allows integration into compatible HPE systems that support open compute project adapters.

Which brand and model should I reference for procurement?

For procurement, the brand is Hewlett Packard Enterprise and the model description is Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter for HPE. The SKU or part identifier to reference is P51181-B21 for ordering and internal cataloging.

Is the P51181-B21 suitable for enterprise environments?

Yes. The product level is explicitly listed as Enterprise and it is a Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter for HPE. This positioning makes it appropriate for business and data center deployments requiring structured 1Gb Ethernet connectivity.

P51181-B21 - HPE Hewlett Packard Enterprise P51181-B21 1Gb 4-port OCP3 adapter

Name: HPE Hewlett Packard Enterprise P51181-B21 1Gb 4-port OCP3 adapter
Brand: HPE
SKU: P51181-B21
Price: 232 USD
Availability: InStock

P51181-B21 - HPE Hewlett Packard Enterprise P51181-B21 1Gb 4-port OCP3 adapter | US IT Hardware

Product overview

The Hewlett Packard Enterprise Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter, SKU P51181-B21, is designed as an enterprise network adapter solution. It is categorized as a 1Gb 4-port BASE-T OCP 3.0 Ethernet adapter for HPE environments. With four 1Gb Ethernet ports in a BASE-T configuration, it supports standard copper cabling for flexible deployment. The adapter is based on the Broadcom BCM5719 controller and is positioned for enterprise use cases that require multiple 1Gb links on a single card. As an OCP 3.0 adapter, it aligns with modern open compute platform infrastructure and helps standardize server connectivity. This product fits organizations seeking consistent, structured Ethernet connectivity within HPE server ecosystems while maintaining a familiar 1Gb BASE-T network architecture.

HPE Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T design
OCP 3.0 Ethernet adapter for compatible HPE platforms
Enterprise-class 1Gb multiport network adapter
Supports four 1Gb Ethernet BASE-T copper connections
Broadcom BCM5719 controller standardization
Designed for enterprise network adapter deployments

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Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	P51181-B21
Brand	HPE
Condition	New
Model	Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter for HPE
Features	Flow control; ACPI support; wake on LAN (WOL); IPv6 support; IPv4 support; PXE support; Receive Side Scaling (RSS); UEFI support; TCP Segmentation Offload (TSO); UEFI PXE Boot; legacy BIOS PXE Boot; Limited root of trust
Interfaces	4 x Ethernet 1000 - RJ-45
Form Factor	Plug-in card
Cabling Type	Ethernet 10Base-T, Ethernet 100Base-TX, Ethernet 1000Base-T
Product Line	Broadcom Adapters for HPE
Product Type	Network adapter

Compatible systems

Adapter is designed for HPE ProLiant Gen10 and Gen11 servers using OCP 3.0 slots.

Best for

Enterprise servers
Suitable for enterprise deployments using HPE servers that require an Ethernet 1Gb 4-port BASE-T OCP 3.0 adapter for structured network connectivity.
Data center 1Gb Ethernet
Fits data center environments standardized on 1Gb Ethernet where a Broadcom BCM5719-based 4-port BASE-T adapter is required for multiple links per server.
Multiport BASE-T consolidation
Useful when consolidating several 1Gb BASE-T connections into a single adapter with four ports for simplified cabling and management.
OCP 3.0 infrastructure
Designed for infrastructures adopting OCP 3.0 adapter form factors and seeking consistent Ethernet 1Gb 4-port BASE-T connectivity across HPE platforms.
Broadcom-based networking
Appropriate for environments standardizing on Broadcom BCM5719 network controllers and enterprise-grade Ethernet 1Gb 4-port BASE-T adapters.

Frequently asked questions

Details

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Option Part Number	P51181-B21

Data Link Protocols	Ethernet, Fast Ethernet, Gigabit Ethernet

Controller / Processor	Broadcom BCM5719

Connectivity Technology	Wired

PCI Specification Revision	PCIe 2.0

Compatible HPE Server Families	HPE ProLiant DL380 Gen11; DL365 Gen11; DL385 Gen11; DL325 Gen11; DL365 Gen10 Plus; DL345 Gen11; DL345 Gen10 Plus; DL380 Gen10 Plus; DL385 Gen10 Plus v2; DL325 Gen10 Plus v2; DL360 Gen10 Plus

Typical Power Consumption	4.69 W
Power Consumption Operational	4.69 W

Ports	Gigabit Ethernet x 4
Interface (Bus) Type	Open Compute Project mezzanine (OCP) 3.0

HPE Hewlett Packard Enterprise P51181-B21 1Gb 4-port OCP3 adapter