{"product_id":"25g-sfp28-sr-for-hpe-bladesystem-845398-b21-25gbase-sr-transceiver","title":"25G SFP28 SR for HPE BladeSystem 845398-B21 - 25GBASE-SR Transceiver","description":"\u003cp\u003eIn this review the 25G SFP28 SR for HPE BladeSystem 845398-B21 is presented as a focused optical transceiver for network engineers and data center technicians who need reliable short-reach 25Gbps links. The bottom line: it excels where compatibility with HPE BladeSystem modules and predictable multimode performance up to 100m are the priority. Our review highlights its straightforward fit with SFP28+ MSA equipment, DOM support for monitoring, and practical distance range, making it a solid choice for server uplinks and 25GBASE-SR deployments.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e The SFP28 module provides a compact duplex LC optical interface that fits standard SFP28 ports for simple installation.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDistance range:\u003c\/strong\u003e Rated for up to 100m on multimode fiber, it covers common short-reach links within racks and across adjacent cabinets.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eOptical wavelength:\u003c\/strong\u003e The 850nm VCSEL design is optimized for multimode fiber types such as OM3 and OM4 commonly used in data centers.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eError correction:\u003c\/strong\u003e Support for RS-FEC and FC-FEC helps maintain data integrity on 25Gbps links and improves resiliency in noisy links.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMonitoring:\u003c\/strong\u003e SFF-8472 DOM support delivers real-time diagnostics for optical power and temperature to aid operations and troubleshooting.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Marketed specifically for BladeSystem 845398-B21 deployments, reducing compatibility guesswork in matched environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe module is aimed at IT professionals managing 25GBASE-SR Ethernet ports, including server uplinks, leaf-spine fabrics and 100GE SR4 fan-out to 25GE SR conversions where short multimode runs are required. It is particularly useful for teams who need DOM telemetry and FEC support to stabilize high-speed links.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing single-mode long-reach optics, transceivers for non-SFP28 form factors, or deployments that require validated vendor-branded warranty cross-coverage beyond the stated maintenance and replacement terms.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eCompact SFP28 form factor that fits existing 25G ports and simplifies upgrades.\u003c\/li\u003e\n \u003cli\u003eUp to 100m reach on multimode fiber covers most in-rack and short inter-rack cabling needs.\u003c\/li\u003e\n \u003cli\u003eDOM plus SFF-8472 compliance gives useful monitoring for operational visibility.\u003c\/li\u003e\n \u003cli\u003eFEC support improves link reliability at 25Gbps in real-world conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eLimited to multimode short-reach applications and not suitable for long-distance single-mode links.\u003c\/li\u003e\n \u003cli\u003eCompatibility is described for BladeSystem 845398-B21 specifically, so mixed environments may need validation before deployment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eForm factor\u003c\/td\u003e\n\u003ctd\u003eSFP28 duplex LC\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eData rate\u003c\/td\u003e\n\u003ctd\u003e25Gbps\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e850nm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMaximum reach\u003c\/td\u003e\n\u003ctd\u003eUp to 100m on multimode (OM4), 70m on OM3\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eSFP28+ MSA, SFF-8472\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eError correction\u003c\/td\u003e\n\u003ctd\u003eSupports RS-FEC and FC-FEC\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMonitoring\u003c\/td\u003e\n\u003ctd\u003eDOM (digital optical monitoring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 25G SFP28 SR transceiver is a practical, cost-effective choice for data centers and server rooms that require reliable short-reach 25Gbps links with diagnostic visibility. Buyers who need multimode, in-rack connectivity and FEC\/DOM support will find good value here, while environments that require long-reach single-mode optics should select a different module.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this module work in non-HPE switches?\u003c\/strong\u003e\u003cbr\u003eIt follows SFP28+ MSA standards so it is compatible with many SFP28 ports, but mixed environments should be validated for compatibility before large deployments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fiber type and distance can be expected?\u003c\/strong\u003e\u003cbr\u003eDesigned for multimode fiber: up to 100m on OM4 and about 70m on OM3 at 25Gbps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it provide monitoring data?\u003c\/strong\u003e\u003cbr\u003eYes, it supports SFF-8472 DOM for optical power, temperature and other diagnostics to aid troubleshooting.\u003c\/p\u003e","brand":"fiber mall","offers":[{"title":"Default Title","offer_id":48203292213467,"sku":"B0B1QGNT4L","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61CqEv_EWDL._SL1500.jpg?v=1770265558","url":"https:\/\/gearmusthave.com\/products\/25g-sfp28-sr-for-hpe-bladesystem-845398-b21-25gbase-sr-transceiver","provider":"GearMustHave","version":"1.0","type":"link"}