How many network ports are available on the HPE P43275-B21 adapter?

This product is defined as a dual-port SFP28 10/25GbE adapter. As a result, it provides two SFP28 network ports on a single card. The dual-port configuration enables designs that require link redundancy, separate traffic paths, or greater aggregate bandwidth using two 10/25Gb Ethernet connections.

What interface does the HPE P43275-B21 adapter use to connect to the server?

The adapter falls under the PCIe 3.0 10/25Gb Ethernet Adapter category. This indicates that it uses a PCI Express 3.0 interface for connectivity to the host system. Knowing that it is a PCIe 3.0 network adapter helps ensure compatibility with appropriate server PCIe slots when planning installations.

What type of network connector is used on the HPE P43275-B21 adapter?

The HPE P43275-B21 is described as a dual-port SFP28 10/25GbE adapter. This means each of its two ports uses the SFP28 form factor. SFP28 ports allow the use of compatible optics or cables suitable for 10Gb or 25Gb Ethernet, aligning with standard SFP28-based network infrastructures.

Is the HPE P43275-B21 suitable for enterprise environments?

The product is explicitly classified at the enterprise product level and belongs to the Network Adapter category with PCIe 3.0 and dual-port SFP28 10/25GbE characteristics. This positioning indicates it is intended for enterprise deployments where structured 10/25Gb Ethernet connectivity and standardized adapter configurations are important.

P43275-B21 - HPE P43275-B21 10/25Gb 2-port SFP28 network adapter

Name: HPE P43275-B21 10/25Gb 2-port SFP28 network adapter
Brand: HPE
SKU: P43275-B21
Price: 272 USD
Availability: InStock

P43275-B21 - HPE P43275-B21 10/25Gb 2-port SFP28 network adapter | US IT Hardware

Product overview

The HPE P43275-B21 Mellanox MCX562A-ACAI Ethernet adapter is an enterprise network adapter designed for environments that require 10 or 25 Gigabit Ethernet connectivity. It provides two SFP28 network ports, enabling flexible deployment with 10Gb or 25Gb Ethernet links. This adapter uses a PCIe 3.0 interface, aligning with modern server platforms in enterprise data centers. As a dual-port SFP28 10/25GbE adapter, it fits into the Network Adapter, PCIe 3.0 10/25Gb Ethernet Adapter, Dual-port SFP28 10/25GbE category. The product is positioned at the enterprise level, making it suitable for business-critical networking where consistent bandwidth and structured infrastructure are priorities. With its combination of dual SFP28 ports, 10/25Gb Ethernet support, and PCIe 3.0 connectivity, the HPE P43275-B21 offers IT teams a standardized option for upgrading or expanding server network capabilities within enterprise architectures.

Supports 10Gb and 25Gb Ethernet connectivity
Dual-port SFP28 10/25GbE network design
PCIe 3.0 interface for server integration
Enterprise-level dual-port Ethernet adapter
Suitable for 10/25Gb Ethernet infrastructures
HPE Mellanox MCX562A-ACAI based adapter

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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 #	P43275-B21
Brand	HPE
Condition	Refurbished
Model	P43275-B21
Bus Type	PCI Express 3.0
Form Factor	Plug-in card
Product Line	HPE Ethernet Adapters
Product Type	Network adapter
Target Use Case	Performance-intensive environments; modern data centers; enterprise servers
Data Link Protocols	10 Gigabit Ethernet; 25 Gigabit LAN
Full Duplex Support	Full-duplex

Best for

Enterprise servers
Suitable for enterprise servers that require a dual-port SFP28 10/25Gb Ethernet adapter using PCIe 3.0, providing structured connectivity for business workloads.
Data centers
Fits data center environments that standardize on PCIe 3.0 10/25Gb Ethernet adapters with dual SFP28 ports for scalable and consistent server networking.
Network upgrades
Appropriate for organizations upgrading from lower-speed adapters to a dual-port 10/25Gb SFP28 Ethernet solution based on PCIe 3.0 for improved bandwidth alignment.
Consolidated network fabrics
Useful in consolidated network fabrics where dual-port SFP28 10/25GbE adapters help standardize connectivity across enterprise systems.
Standardized hardware portfolios
Supports IT teams building standardized hardware portfolios around enterprise-level PCIe 3.0 dual-port SFP28 10/25Gb Ethernet adapters.

Frequently asked questions

What Ethernet speeds does the HPE P43275-B21 adapter support?

Details

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Adapter Architecture	Mellanox ConnectX-5

Underlying Controller Model	Mellanox MCX562A-ACAI

Throughput Class	10/25GbE high-throughput
Aggregate Theoretical Bandwidth	50 Gbps

Networking Ports & Interfaces

Ports	2 x SFP28 10GbE/25GbE Ethernet ports
Port Count	2 ports
Connector Type	SFP28
Interface Type	PCI Express 3.0
PCIe Lane Configuration	PCIe 3.0 x8
Per-Port Maximum Data Rate	25 Gbps per port
PCIe Specification Revision	PCIe 3.0
Supported Ethernet Standards	10 Gigabit Ethernet; 25 Gigabit Ethernet

HPE P43275-B21 10/25Gb 2-port SFP28 network adapter