P51305-001 is the HPE spare part number for Broadcom BCM5719 Ethernet 1Gb 4-port BASE-T OCP3 Adapter for HPE. This is the number stamped on the adapter label and referenced in HPE service documentation and iLO event logs, so it is what you will find after pulling a failed OCP card. The adapter is an OCP 3.0 mezzanine card built on a single Broadcom BCM5719 controller, with four RJ-45 Gigabit Ethernet ports and a PCIe 2.0 host interface. It drops into the OCP 3.0 slot of supported ProLiant Gen10 Plus and Gen11 servers as a like-for-like replacement.
HPE Option Part #: P51181-B21
HPE Spare Part #: P51305-001
PRODUCT SPECIFICATIONS FOR P51305-001:
- Device Type: Network adapter
- Form Factor: Plug-in card
- Interface (Bus) Type: Open Compute Project mezzanine (OCP) 3.0
- PCI Specification Revision: PCIe 2.0
- Ports: Gigabit Ethernet x 4
- Connectivity Technology: Wired
- Cabling Type: Ethernet 10Base-T, Ethernet 100Base-TX, Ethernet 1000Base-T
- Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet
- Data Transfer Rate: 1 Gbps
- 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
- Processor: 1 x Broadcom BCM5719
- Interfaces: 4 x Ethernet 1000 - RJ-45
- Power Consumption Operational: 4.69 Watt
COMPATIBLE WITH:
PROLIANT DL SERIES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
FREQUENTLY ASKED QUESTIONS ABOUT P51305-001
What is the difference between P51305-001 and P51181-B21?
They are the same physical adapter under two HPE numbering schemes. P51305-001, the number on this page, is the spare part number: the identifier printed on the card and cited in service documentation and replacement procedures. P51181-B21 is the option kit number used when the adapter is ordered as a standalone sales product. If your failed card shows either number, this adapter is the correct functional replacement.
Which servers accept this adapter?
P51305-001 is supported in the DL380 Gen11, DL385 Gen11, DL365 Gen11, DL345 Gen11, DL325 Gen11, DL380 Gen10 Plus, DL360 Gen10 Plus, DL385 Gen10 Plus v2, DL365 Gen10 Plus, DL345 Gen10 Plus, and DL325 Gen10 Plus v2. It installs in the server's OCP 3.0 mezzanine slot rather than a standard PCIe expansion slot, so confirm the OCP slot is the one your failed card came out of.
What ports and speeds does it provide?
Four RJ-45 copper ports, each running at up to 1 Gb/s. The ports support 10Base-T, 100Base-TX, and 1000Base-T cabling, covering Ethernet, Fast Ethernet, and Gigabit Ethernet data link protocols. All connectivity is wired copper; there are no optical cages or transceivers involved, so your existing structured cabling and switch ports carry over directly after the swap.
Does it support network boot and offload features?
Yes. The adapter supports UEFI PXE Boot and legacy BIOS PXE Boot, so deployment workflows that relied on the failed card should behave the same after replacement. It also provides Receive Side Scaling, TCP Segmentation Offload, flow control, Wake on LAN, ACPI support, IPv4 and IPv6 support, UEFI support, and limited root of trust.
What power does it draw?
Operational power consumption is 4.69 watts. The card is powered through the OCP 3.0 mezzanine connector, so no auxiliary power cable is required. Because the draw is low and the form factor is fixed, replacing a failed unit with P51305-001 does not change server power or thermal planning relative to the card being removed.
HPE PARTSURFER INFO FOR P51305-001 (P51181-B21)
| Spare PN | Description | |
|---|---|---|
| P51305-001 | SPS-PCA OCP 4p 1Gb BASE-T BCM 5719 Opn |
Last Updated: 2026-08-03
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This product is warrantied against hardware failure for a period of 1 Year from the date of purchase. Before making a purchase, please take a moment to review our return policy below.
Returns
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