{"id":10588,"date":"2026-05-13T06:34:36","date_gmt":"2026-05-13T06:34:36","guid":{"rendered":"https:\/\/cablefam.com\/?p=10588"},"modified":"2026-08-09T09:26:32","modified_gmt":"2026-08-09T09:26:32","slug":"differences-and-applications-of-lc-sc-st-fc-fiber-connectors","status":"publish","type":"post","link":"https:\/\/cablefam.com\/ko\/blog\/guides-tutorials\/differences-and-applications-of-lc-sc-st-fc-fiber-connectors.html","title":{"rendered":"LC \/ SC \/ ST \/ FC \uad11\uc12c\uc720 \ucee4\ub125\ud130\uc758 \ucc28\uc774\uc810 \ubc0f \uc751\uc6a9 \ubd84\uc57c"},"content":{"rendered":"<h2 class=\"wp-block-heading\">1. Core Parameter Overview<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Connector<\/th><th class=\"has-text-align-center\" data-align=\"center\">Shape<\/th><th class=\"has-text-align-center\" data-align=\"center\">Ferrule Diameter<\/th><th class=\"has-text-align-center\" data-align=\"center\">Locking Method<\/th><th class=\"has-text-align-center\" data-align=\"center\">Port Density<\/th><th class=\"has-text-align-center\" data-align=\"center\">Main Application<\/th><\/tr><\/thead><tbody><tr><td><strong>LC<\/strong><\/td><td>Small square<\/td><td>1.25mm<\/td><td>Snap latch<\/td><td>Highest<\/td><td>Data centers, optical modules, high-density cabling<\/td><\/tr><tr><td><strong>SC<\/strong><\/td><td>Large square<\/td><td>2.5mm<\/td><td>Push-in lock<\/td><td>Medium<\/td><td>Home broadband, PON, ordinary LAN<\/td><\/tr><tr><td><strong>ST<\/strong><\/td><td>Round bayonet<\/td><td>2.5mm<\/td><td>Twist bayonet<\/td><td>Low<\/td><td>Old campus networks, surveillance, legacy building wiring<\/td><\/tr><tr><td><strong>FC<\/strong><\/td><td>Round threaded<\/td><td>2.5mm<\/td><td>Screw fastening<\/td><td>Lowest<\/td><td>ODF racks, base stations, precision instruments, long-distance trunk lines<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2. Detailed Introduction &amp; Application<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">LC Connector (Small Square)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure<\/strong>: Compact square design with spring latch, available in duplex integrated jumpers.<\/li>\n\n\n\n<li><strong>Features<\/strong>: Half the size of SC, <strong>highest port density<\/strong>, easy plug-and-play, low insertion loss.<\/li>\n\n\n\n<li><strong>\uc9c0\uc6d0\uc11c<\/strong>:\n<ol class=\"wp-block-list\">\n<li>Data centers, rack switches, SFP\/SFP+\/QSFP optical modules.<\/li>\n\n\n\n<li>10G\/25G\/100G high-speed fiber links.<\/li>\n\n\n\n<li>High-density patch panels and server rooms.<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Its products mainly include<\/strong>\uff1a<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-794e3cfa wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/OS2-LC-TO-LC-DUPLEX-300x300.jpg\" alt=\"OS2 LC TO LC DUPLEX 1\" style=\"object-fit:cover\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-upc-to-lc-upc-switchable-uniboot-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\">LC UPC to LC UPC Switchable Uniboot Duplex OS2 Single Mode LSZH 2.0mm Fiber Optic Patch Cable<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/os2-9-1-300x300.webp\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-apc-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\">LC APC \ub4c0\ud50c\ub809\uc2a4 OS2 \ub2e8\uc77c \ubaa8\ub4dc LSZH 2.0mm \uad11\uc12c\uc720 \ud328\uce58 \ucf00\uc774\ube14<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">SC Connector (Large Square)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure<\/strong>: Square push-in design, locks directly after insertion, no rotation or screwing needed.<\/li>\n\n\n\n<li><strong>Features<\/strong>: Cost-effective, durable, simple operation, low failure rate.<\/li>\n\n\n\n<li><strong>\uc9c0\uc6d0\uc11c<\/strong>:\n<ol class=\"wp-block-list\">\n<li>Home broadband, optical modem, operator fiber access.<\/li>\n\n\n\n<li>PON fiber, FTTH access, general enterprise LAN.<\/li>\n\n\n\n<li>Ordinary fiber transceivers and weak current cabinet wiring.<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Its products mainly include<\/strong>\uff1a<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-794e3cfa wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/OM3-Fiber4-1-300x300.jpg\" alt=\"OS2 LC TO LC DUPLEX 1\" style=\"object-fit:cover\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-upc-to-lc-upc-switchable-uniboot-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/om3-multimode-duplex-sc-upc-to-sc-upc-ofnp-fiber-cable.html\">OM3 Multimode Duplex SC UPC to SC UPC OFNP Fiber Cable<\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/imgi_58_p920185-640x640-1m-3ft-simplex-os2-single-mode-sc-apc-to-sc-apc-pvc-ofnr-fiber-optic-cable-300x300.jpg\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-apc-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/simplex-os2-single-mode-sc-apc-to-sc-apc-pvc-ofnr-fiber-optic-cable.html\">Simplex OS2 Single Mode SC APC to SC APC PVC (OFNR) Fiber Optic Cable<\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">ST Connector (Round Bayonet)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure<\/strong>: Round shape, lock by rotating 90\u00b0 after insertion.<\/li>\n\n\n\n<li><strong>Features<\/strong>: Good tensile resistance, bulky and space-consuming, gradually phased out.<\/li>\n\n\n\n<li><strong>\uc9c0\uc6d0\uc11c<\/strong>:\n<ol class=\"wp-block-list\">\n<li>Legacy campus networks, old factories and building cabling.<\/li>\n\n\n\n<li>Security monitoring and industrial fiber points.<\/li>\n\n\n\n<li>Renovation of existing old equipment.<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Its products mainly include<\/strong>\uff1a<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-794e3cfa wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/OM2-fiber-cable1-300x300.jpg\" alt=\"OS2 LC TO LC DUPLEX 1\" style=\"object-fit:cover\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-upc-to-lc-upc-switchable-uniboot-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/om3-multimode-duplex-sc-upc-to-sc-upc-ofnp-fiber-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/duplex-om2-multimode-lc-upc-to-st-upc-pvc-ofnr-fiber-optic-cable.html\">\ub4c0\ud50c\ub809\uc2a4 OM2 \uba40\ud2f0\ubaa8\ub4dc LC UPC - ST UPC PVC (OFNR) \uad11\uc12c\uc720 \ucf00\uc774\ube14<\/a><\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/imgi_61_p918762-640x640-1m-3ft-duplex-os2-single-mode-lc-apc-to-st-apc-pvc-ofnr-fiber-optic-cable-300x300.jpg\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-apc-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/simplex-os2-single-mode-sc-apc-to-sc-apc-pvc-ofnr-fiber-optic-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/duplex-os2-single-mode-lc-apc-to-st-apc-pvc-ofnr-fiber-optic-cable.html\">Duplex OS2 Single Mode LC APC to ST APC PVC (OFNR) Fiber Optic Cable<\/a><\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">FC Connector (Round Threaded)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure<\/strong>: Round with threaded nut, fixed by screwing tightly.<\/li>\n\n\n\n<li><strong>Features<\/strong>: Excellent vibration resistance, stable connection, good dustproof and anti-loosening performance; slow wiring and large size.<\/li>\n\n\n\n<li><strong>\uc9c0\uc6d0\uc11c<\/strong>:\n<ol class=\"wp-block-list\">\n<li>Telecom room ODF patch panels and backbone trunk transmission.<\/li>\n\n\n\n<li>Base stations, microwave communication and outdoor high-vibration environments.<\/li>\n\n\n\n<li>Fiber optic test instruments and precision communication devices.<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Its products mainly include<\/strong>\uff1a<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-794e3cfa wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/OM2-Multimode1-1-300x300.jpg\" alt=\"OS2 LC TO LC DUPLEX 1\" style=\"object-fit:cover\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-upc-to-lc-upc-switchable-uniboot-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/om3-multimode-duplex-sc-upc-to-sc-upc-ofnp-fiber-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/sc-lc-fc-st-optical-fiber-patch-cable-50-125%ce%bcm-upc-to-upc-duplex-om2-multimode-lszh-ofnr-3-0mm-fiber-optic-patch-cord.html\">SC LC FC ST Optical Fiber Patch Cable 50\/125\u03bcm UPC to UPC Duplex OM2 Multimode LSZH (OFNR) 3.0mm<\/a><\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cablefam.com\/wp-content\/uploads\/fiber-cable-1-300x300.jpg\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cablefam.com\/ko\/product\/lc-apc-duplex-os2-single-mode-lszh-2-0mm-fiber-optic-patch-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/simplex-os2-single-mode-sc-apc-to-sc-apc-pvc-ofnr-fiber-optic-cable.html\"><a href=\"https:\/\/cablefam.com\/ko\/product\/sc-lc-fc-st-os2-switchable-optical-fiber-patch-cable-duplex-omultimode-lszh-ofnr-3-0mm-fiber-optic-patch-cord.html\">SC LC FC ST OS2 Switchable Optical Fiber Patch Cable Duplex Multimode LSZH (OFNR) 3.0mm Fiber Optic<\/a><\/a><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">3. Key Differences Summary<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\ud398\ub7f4<\/strong>: LC is 1.25mm; SC\/ST\/FC are all 2.5mm.<\/li>\n\n\n\n<li><strong>Connection Method<\/strong>:\n<ul class=\"wp-block-list\">\n<li>LC \/ SC: <strong>Direct plug and play<\/strong>, fastest operation.<\/li>\n\n\n\n<li>ST: <strong>Twist to lock<\/strong>.<\/li>\n\n\n\n<li>FC: <strong>Screw tight<\/strong>, most stable but slowest.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Density Ranking<\/strong>: LC &gt; SC &gt; ST &gt; FC<\/li>\n\n\n\n<li><strong>Vibration Resistance Ranking<\/strong>: FC &gt; ST &gt; SC &gt; LC<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4. Selection Guide<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Data center high-speed, optical module, high density \u2192 <strong>Choose LC<\/strong><\/li>\n\n\n\n<li>Home broadband, optical modem, general office networking \u2192 <strong>Choose SC<\/strong><\/li>\n\n\n\n<li>Legacy equipment, old campus surveillance \u2192 <strong>Choose ST<\/strong><\/li>\n\n\n\n<li>Room patch panel, base station, precision testing, trunk line \u2192 <strong>Choose FC<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Supplement<\/strong>: All four connectors have <strong>UPC (Blue)<\/strong> \/ <strong>APC (Green)<\/strong> end types, <strong>do not mix connections<\/strong>.<\/p>","protected":false},"excerpt":{"rendered":"<p>1. Core Parameter Overview Connector Shape Ferrule Diameter Locking Method Port Density Main Application LC Small square 1.25mm Snap latch Highest Data centers, optical modules, high-density cabling SC Large square 2.5mm Push-in lock Medium Home broadband, PON, ordinary LAN ST Round bayonet 2.5mm Twist bayonet Low Old campus networks, surveillance, legacy building wiring FC Round [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10444,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[1382,1379,1380,1381],"class_list":["post-10588","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides-tutorials","tag-fc-fiber","tag-lc-fiber","tag-sc-fiber","tag-st-fiber"],"_links":{"self":[{"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/posts\/10588","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/comments?post=10588"}],"version-history":[{"count":2,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/posts\/10588\/revisions"}],"predecessor-version":[{"id":10598,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/posts\/10588\/revisions\/10598"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/media\/10444"}],"wp:attachment":[{"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/media?parent=10588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/categories?post=10588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cablefam.com\/ko\/wp-json\/wp\/v2\/tags?post=10588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}