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Global leader in new, refurbished, compatible & discontinued multivendor IT-Hardware, spares and print supplies.
| Part Number: | 845398-B21 |
|---|---|
| Manufacturer: | HPE |
| Networking: | Transceiver |
| Model: | 28SR |
| Description: | Buy HPE 845398-B21 28SR 25GB SFP Transceiver. Genuine part with fast worldwide shipping from Euroland IT Store UK. |
| Availability: | In Stock |
The HPE 845398-B21 is a 25Gb SFP28 short-reach (SR) optical transceiver option used to connect HPE server network adapters into 25 Gigabit Ethernet infrastructure. As data centres move beyond 10GbE at the server edge, 25GbE has become the mainstream standard, offering the same cabling concepts with 2.5 times the bandwidth, and the 845398-B21 is the qualified optic that lights up SFP28 adapter ports over multimode fibre. Euroland IT Store holds this option new and refurbished in UK stock with fast dispatch.
Designed for short-reach links over LC-terminated multimode fibre, the 845398-B21 suits the classic in-row and cross-row runs between server NICs and top-of-rack or end-of-row switches. It is hot-pluggable, so optics can be installed or exchanged on live systems, and its SR design keeps per-link costs sensible where distances are modest. Typical deployments include virtualisation hosts moving east-west traffic, storage servers running iSCSI or NVMe-over-fabrics style workloads, and any server refresh standardising on 25GbE connectivity.
Buyers searching for this part number are usually populating adapters such as HPE’s 10/25Gb SFP28 NICs during a server rollout, or replacing an optic flagged by a failed link. Using the qualified HPE option matters on both counts: it ensures clean 25Gb negotiation, keeps the adapter within supported configurations and avoids the interoperability guesswork of unbranded optics. The equivalent spares-channel part is 849442-001, which we also stock.
As a trusted UK supplier of enterprise networking components and HPE parts, Euroland IT Store tests every refurbished 845398-B21 before shipment and prices both new and refurbished stock well below list. For rollouts needing dozens of matched optics, our volume pricing makes 25GbE adoption noticeably cheaper. Request a quote online, or ask our team to confirm compatibility against your adapter part numbers first.
Standardising on the 845398-B21 gives every server a clean 25Gb link with the low, consistent latency that hypervisors, distributed storage and container platforms depend on. Compared with running dual 10Gb links, one 25Gb connection simplifies cabling and switch port usage while more than doubling throughput, a practical win for dense racks. This optic installs directly into adapters such as the HPE P08443-B21 10/25Gb SFP28 Network Adapter, and its spares-channel twin, the HPE 849442-001 25Gb SFP28 SR Transceiver, covers post-failure replacements.
The qualified HPE optic also removes risk from the rollout. Links negotiate correctly first time, adapters stay within supported configurations, and any future support case proceeds without questions about third-party optics. When a project involves hundreds of links, avoiding even a small failure rate saves real engineering time.
Buying from Euroland IT Store compounds the value: tested refurbished 845398-B21 units cost a fraction of list price, making full dual-port population and shelf spares affordable across an estate, while new stock covers policy-driven purchases. You can browse the full range of SFP+, SFP28 and QSFP28 modules in our networking transceivers category. With UK stock, quick quotes and volume discounts for resellers and IT teams, upgrading the server edge to 25GbE becomes a straightforward, well-priced exercise.
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