{"id":5323,"date":"2026-05-13T10:27:09","date_gmt":"2026-05-13T10:27:09","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp28-25g-esr-vs-sfp28-25g-sr-key-differences\/"},"modified":"2026-05-25T09:17:10","modified_gmt":"2026-05-25T09:17:10","slug":"sfp28-25g-esr-vs-sfp28-25g-sr-key-differences","status":"publish","type":"post","link":"https:\/\/lp.szlogic.cn\/ru\/knowledge-center\/sfp28-25g-esr-vs-sfp28-25g-sr-key-differences","title":{"rendered":"SFP28 25G SR vs ESR: Your Ultimate Guide to Choosing the Right 25G Transceiver"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec.webp\" alt=\"SFP28-25G-ESR vs SFP28-25G-SR Key Differences and Best Use Cases\" class=\"wp-image-5321\" srcset=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec.webp 1200w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec-300x178.webp 300w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec-1024x608.webp 1024w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec-768x456.webp 768w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/08c2502efd6f4a5392fdecca6e858dec-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In the high-speed world of modern networking, 25GbE has become the sweet spot for top-of-rack switching, data center interconnects, and enterprise backbone links. When deploying this technology, two of the most common transceiver types you&#8217;ll encounter are the <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473141.htm\"><strong>SFP28-25G-SR<\/strong><\/a> and the <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476088.htm\"><strong>SFP28-25G-ESR<\/strong><\/a>. While they might seem similar at a glance, understanding their differences is key to optimizing your network&#8217;s performance and cost-efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide will provide a professional comparison to clear up any confusion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Understanding the Basics: SR vs. ESR<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Both modules are designed for short-range communication over <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/om1-om2-om3-om4-om5-multimode-fiber-guide\"><strong>multimode fiber (MMF)<\/strong><\/a>, using a wavelength of 850nm. The core distinction lies in their reach and the underlying technology that enables it.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>SFP28-25G-SR (Short Reach):<\/strong> This is the standard workhorse for short-distance connections. It is designed for reaches up to 100 meters on OM4 fiber.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>SFP28-25G-ESR (Extended Short Reach):<\/strong> As the name suggests, this module pushes the boundaries further. It leverages more sophisticated optics to achieve an <strong>extended reach<\/strong> of up to 400 meters on OM4 fiber.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Head-to-Head Comparison: Key Differences<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s dive into the technical specifics. The following table outlines the critical differences between these two <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\"><strong>25G SFP28 transceivers<\/strong><\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>Feature<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>SFP28-25G-SR<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>SFP28-25G-ESR<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Full Name<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Short Reach<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Extended Short Reach<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Standard Reach<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Up to 70m on OM3 \/ 100m on OM4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Up to 300m on OM3 \/ 400m on OM4<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Fiber Type<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Multimode Fiber (OM3, OM4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Multimode Fiber (OM3, OM4)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Wavelength<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>850nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>850nm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Max Power Consumption<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Typically &lt; 1.0W<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Slightly higher, ~1.2W<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Application<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Short links within a rack or between adjacent racks<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Longer intra-data center links, campus backbones<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Cost<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>&#x2705; Lower (Industry Standard)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>&#x26a1; Higher (Extended Performance)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Choosing the Right Module for Your Application<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Your choice isn&#8217;t just about distance; it&#8217;s about use case.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px 0px 4px;\"><strong>Choose SFP28-25G-SR if:<\/strong><\/p><ul><li><p style=\"margin: 0px;\">You are connecting servers to a <strong>top-of-rack (ToR) switch<\/strong> within the same rack.<\/p><\/li><li><p style=\"margin: 0px;\">Your link distances are well under 100 meters.<\/p><\/li><li><p style=\"margin: 0px;\">Your priority is achieving the lowest possible cost per port for standard short-reach applications.<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px 0px 4px;\"><strong>Choose SFP28-25G-ESR if:<\/strong><\/p><ul><li><p style=\"margin: 0px;\">You need to cover longer distances within a <strong>data center hall<\/strong> or between buildings on a <strong>campus network<\/strong> without upgrading to single-mode fiber.<\/p><\/li><li><p style=\"margin: 0px;\">Your links are between 100m and 400m.<\/p><\/li><li><p style=\"margin: 0px;\">You value the flexibility to cover longer runs and avoid the cost of installing new single-mode fiber infrastructure.<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For those seeking <strong>high-quality, compatible<\/strong> optics that deliver on their specifications, the <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473141.htm\"><strong>LS-MM8525-S1C<\/strong><\/a> and <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476088.htm\"><strong>LS-MM8525-S3C<\/strong><\/a> modules are engineered for maximum performance and reliability. They are rigorously tested for <strong>compatibility<\/strong> with major OEM switches from Cisco, Arista, Juniper, and others, ensuring a seamless integration into your existing network infrastructure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Conclusion and Next Steps<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There is no &#8220;better&#8221; module\u2014only the right module for your specific needs. The <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473141.htm\"><strong>SFP28-25G-SR<\/strong><\/a> offers a cost-effective solution for the majority of short-reach applications, while the <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476088.htm\"><strong>SFP28-25G-ESR<\/strong><\/a> provides the essential extra reach for more demanding network designs.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c.webp\" alt=\"SFP28 Module\" class=\"wp-image-5322\" srcset=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c.webp 1200w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c-300x178.webp 300w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c-1024x608.webp 1024w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c-768x456.webp 768w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/941a57c76dd5479e8df3313a500e574c-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Still unsure which 25G transceiver is the perfect fit for your network topology?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our experts at <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\"><strong>LINK-PP<\/strong><\/a> are here to help. We provide <strong>free consultation<\/strong> and <strong>lifetime warranties<\/strong> on all our optical transceivers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#x27a1;&#xfe0f; <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\"><strong>Browse our complete catalog of SFP28 modules and get a quote today!<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Frequently Asked Questions (FAQ)<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q1: Can I use an ESR module for a very short link (e.g., 10 meters)?<\/strong><br\/><strong>A:<\/strong> Yes, you technically can. SFP28-25G-ESR modules are backward compatible with shorter distances. However, it is not cost-effective. You would be spending more on the ESR module without utilizing its key feature (extended reach). The SR variant is the optimal and economical choice for short links.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q2: Are these modules compatible with my existing Cisco\/Juniper\/Arista switch?<\/strong><br\/><strong>A:<\/strong> Most third-party modules, including those from <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a>, are designed to be <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/multi-source-agreements-optical-transceivers\"><strong>MSA (Multi-Source Agreement)<\/strong><\/a> compliant. This ensures broad interoperability. However, it is always critical to choose a reputable supplier that performs rigorous <strong>compatibility testing<\/strong> to avoid any issues. All LINK-PP transceivers are pre-programmed and tested for full compatibility with major brands.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q3: Can I use OM5 fiber with these transceivers?<\/strong><br\/><strong>A:<\/strong> Yes! Both SR and ESR modules are fully compatible with OM5 fiber. OM5 is designed to be backward compatible with OM4. You can expect the same reach performance on OM5 as you would on OM4 (100m for SR, 400m for ESR). OM5&#8217;s main advantage is for wider spectrum applications like <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/100g-swdm4-transceiver-explained-network-professionals-guide\"><strong>SWDM<\/strong><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q4: What is the difference between ESR and LR? Why not always use LR for long distance?<\/strong><br\/><strong>A:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>SFP28-25G-LR<\/strong><\/a> (Long Reach) uses a <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/what-is-single-mode-fiber-and-how-does-it-work\"><strong>single-mode fiber (SMF)<\/strong><\/a> and a 1310nm laser to achieve distances up to 10km. The key difference is the fiber type. ESR allows you to leverage your existing multimode fiber infrastructure for distances up to 400m. Switching to LR requires a more expensive single-mode fiber cabling system, which has a higher initial installation cost. ESR provides a perfect cost-saving solution for intermediate distances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q5: Do ESR modules generate more heat or consume more power?<\/strong><br\/><strong>A:<\/strong> Generally, yes. The extended reach capability of the ESR module requires higher laser output power, which typically results in a slightly higher power consumption (and thus, heat dissipation) compared to the SR variant. However, the difference is usually marginal (e.g., 1.0W vs. 1.2W) and is well within the thermal design limits of modern switches.<\/p>","protected":false},"excerpt":{"rendered":"<p>Compare sfp28-25g-esr and sfp28-25g-sr modules for 25G networks. See key differences in distance, fiber type, and best use cases for data centers.<\/p>","protected":false},"author":1,"featured_media":5321,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-5323","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/5323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/comments?post=5323"}],"version-history":[{"count":2,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/5323\/revisions"}],"predecessor-version":[{"id":7598,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/5323\/revisions\/7598"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/media\/5321"}],"wp:attachment":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/media?parent=5323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/categories?post=5323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/tags?post=5323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}