{"id":9663,"date":"2026-07-05T09:06:46","date_gmt":"2026-07-05T09:06:46","guid":{"rendered":"https:\/\/materialparts.com\/at-3237-tf-lw140-r\/"},"modified":"2026-07-05T09:06:46","modified_gmt":"2026-07-05T09:06:46","slug":"at-3237-tf-lw140-r","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/at-3237-tf-lw140-r\/","title":{"rendered":"AT-3237-TF-LW140-R"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The AT-3237-TF-LW140-R from PUI Audio (Projects Unlimited) is a piezoelectric transducer\/buzzer with 3,700Hz resonant frequency and 98dBA minimum sound pressure level at 10cm. It operates from 3 to 28 Vp-p with 12 Vp-p rated voltage. The panel-mount design includes pre-attached UL1095 AWG #28 wire leads.<\/p>\n

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Resonant Frequency<\/td>\n3,700 Hz (+-500 Hz)<\/td>\n<\/tr>\n
Min SPL @ 10cm<\/td>\n98 dBA<\/td>\n<\/tr>\n
Rated Voltage<\/td>\n12 Vp-p<\/td>\n<\/tr>\n
Operating Voltage<\/td>\n3 ~ 28 Vp-p<\/td>\n<\/tr>\n
Max Current<\/td>\n7 mA<\/td>\n<\/tr>\n
Capacitance<\/td>\n20,000 pF (+-30%)<\/td>\n<\/tr>\n
Drive Circuit<\/td>\nExternal<\/td>\n<\/tr>\n
Mounting<\/td>\nPanel mount<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-30C to +85C<\/td>\n<\/tr>\n
Weight<\/td>\n7.5 g<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • 98dBA minimum SPL for loud alert indication<\/li>\n
  • External drive circuit allows flexible frequency control<\/li>\n
  • Wide operating voltage range from 3 to 28 Vp-p<\/li>\n
  • Panel-mount design with pre-attached wire leads<\/li>\n
  • ABS housing for durability in industrial environments<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial equipment alarm and status indicators<\/li>\n
    • Medical device alert and warning beepers<\/li>\n
    • Consumer appliance audible alerts<\/li>\n
    • Security system warning sounds<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AT-3237-TF-LW140-R from PUI Audio (Projects Unlimited) is a piezoelectric transducer\/buzzer with 3,700Hz resonant frequency and 98dBA minimum sound pressure level at 10cm. It operates from 3 to 28 Vp-p with 12 Vp-p rated voltage. The panel-mount design includes pre-attached UL1095 AWG #28 wire leads. Key Specifications Resonant Frequency 3,700 Hz (+-500 Hz) […]<\/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":[940],"chip_brand":[939],"class_list":["post-9663","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-at-3237-tf-lw140-r","chip_brand-pui-audio"],"acf":{"brief_explanation":"3.7kHz piezo transducer, 98dBA SPL, 12Vp-p, panel mount, external drive, wire leads","date_code":"","package_case":"Panel mount with wire leads (ABS housing)","in_stock":13279,"datasheet":"https:\/\/sg.element14.com\/pui-audio\/at-3237-tf-lw140-r\/transducer-3-7khz-100mm-98dba\/dp\/4411309","price":"$2.08 @ 160pc","product_introduction":"The PUI Audio AT-3237-TF-LW140-R is a piezoelectric transducer designed for external-drive audible alert applications. With a resonant frequency of 3,700Hz and minimum sound pressure level of 98dBA at 10cm, this transducer produces clearly audible alarm tones in industrial and medical environments. The external drive circuit requirement allows the designer to control the drive frequency for optimized SPL output at resonance, or to generate multi-tone alert patterns. The wide 3 to 28 Vp-p operating voltage range accommodates both low-voltage logic-level drives and higher-voltage industrial supplies. The panel-mount design with pre-attached UL1095 AWG #28 wire leads simplifies mechanical installation in enclosure panels.","working_principle":"The AT-3237-TF-LW140-R uses a piezoelectric ceramic disc bonded to a metal diaphragm. When an AC voltage is applied across the ceramic element at or near the 3,700Hz resonant frequency, the inverse piezoelectric effect causes the disc to flex, generating sound waves. Maximum SPL output is achieved when the drive frequency matches the mechanical resonance of the disc assembly. The 20,000pF capacitance is characteristic of the piezo ceramic element and determines the reactive current draw at the drive frequency. As an external-drive device, the host circuit must generate the AC excitation signal, typically using a 555 timer, MCU PWM output, or dedicated buzzer driver IC.","pin_description":"
      Lead<\/th>Color<\/th>Function<\/th><\/tr>
      1<\/td>Blue (F)<\/td>Piezo element terminal 1<\/td><\/tr>
      2<\/td>Red (M)<\/td>Piezo element terminal 2<\/td><\/tr>
      3<\/td>Black (G)<\/td>Ground \/ mounting tab<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial equipment alarm and status audible indicators<\/li>
      • Medical device alert and warning beeps<\/li>
      • Consumer appliance audible status alerts<\/li>
      • Security system warning sound generators<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        PUI Audio<\/td>AT-3037-TF-LW100-R<\/td>Panel mount<\/td>Similar, different SPL rating<\/td><\/tr>
        Murata<\/td>PKM13EPYH4000<\/td>SMD<\/td>Piezo transducer, surface mount<\/td><\/tr>
        TDK<\/td>PS1240P02BT<\/td>SMD<\/td>Piezo buzzer element, SMD<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9663"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9663\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9663"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}