{"id":9699,"date":"2026-07-05T09:38:37","date_gmt":"2026-07-05T09:38:37","guid":{"rendered":"https:\/\/materialparts.com\/cmt-8540s-smt-tr-2\/"},"modified":"2026-07-05T09:38:37","modified_gmt":"2026-07-05T09:38:37","slug":"cmt-8540s-smt-tr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/cmt-8540s-smt-tr-2\/","title":{"rendered":"CMT-8540S-SMT-TR"},"content":{"rendered":"<h2>\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n<p>The CMT-8540S-SMT-TR is a magnetic transducer\/buzzer from CUI Devices in a surface-mount package. It produces a minimum sound pressure level of 85 dB at 10 cm with a rated voltage of 5V. The SMT design enables automated PCB assembly while the tape-and-reel packaging supports high-volume manufacturing.<\/p>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<ul>\n<li>Type: Magnetic buzzer (external drive)<\/li>\n<li>Rated Voltage: 5V<\/li>\n<li>Min SPL: 85 dB @10cm<\/li>\n<li>Resonant Frequency: 4.0 kHz<\/li>\n<li>Operating Voltage: 3V ~ 7V<\/li>\n<li>Current: \u226430mA<\/li>\n<li>Mounting: SMD (surface mount)<\/li>\n<li>Packaging: Tape &#038; Reel<\/li>\n<li>Operating Temperature: -30\u00b0C ~ +70\u00b0C<\/li>\n<\/ul>\n<h2>\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n<ul>\n<li>Surface-mount design for automated assembly<\/li>\n<li>External drive circuit required<\/li>\n<li>Tape-and-reel packaging<\/li>\n<li>Compact footprint for space-constrained designs<\/li>\n<\/ul>\n<h2>\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n<ul>\n<li>Consumer electronics audible alerts<\/li>\n<li>Medical device alarms<\/li>\n<li>Industrial equipment status indicators<\/li>\n<li>Home appliance notification tones<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The CMT-8540S-SMT-TR is a magnetic transducer\/buzzer from CUI Devices in a surface-mount package. It produces a minimum sound pressure level of 85 dB at 10 cm with a rated voltage of 5V. The SMT design enables automated PCB assembly while the tape-and-reel packaging supports high-volume manufacturing. Key Specifications Type: Magnetic buzzer (external drive) [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[947],"chip_brand":[969],"class_list":["post-9699","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-cmt-8540s-smt-tr","chip_brand-cui-devices"],"acf":{"brief_explanation":"Magnetic buzzer\/transducer, 85dB SPL, 4kHz, 5V rated, SMD, tape & reel, -30~70\u00b0C","date_code":"","package_case":"SMD (surface mount)","in_stock":7392,"datasheet":"https:\/\/www.cui.com\/product\/audio\/buzzers\/cmt-8540s-smt-tr","price":"","product_introduction":"The CMT-8540S-SMT-TR from CUI Devices is a surface-mount magnetic buzzer producing 85dB SPL at 4kHz with 5V rated voltage, ideal for automated PCB assembly.","working_principle":"The magnetic buzzer uses an electromagnetic coil and a vibrating diaphragm. When an AC signal at the resonant frequency (4kHz) is applied, the coil generates an alternating magnetic field that vibrates the diaphragm, producing audible sound through the SMD housing.","pin_description":"<table><tr><th>Pin<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>Positive terminal<\/td><\/tr><tr><td>2<\/td><td>Negative terminal<\/td><\/tr><\/table>","application_scenarios":"<ul><li>Medical device audible alerts<\/li><li>Consumer electronics notification<\/li><li>Point-of-sale terminal beeps<\/li><li>Industrial status indicators<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>SPL<\/th><th>Freq<\/th><\/tr><tr><td>CMT-4023S-SMT-TR<\/td><td>CUI Devices<\/td><td>72dB<\/td><td>2.3kHz<\/td><\/tr><tr><td>PUI AT-3237-TF<\/td><td>PUI Audio<\/td><td>98dB<\/td><td>3.7kHz<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9699","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=9699"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9699\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9699"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9699"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}