{"type":"product","schema_version":"1.0","item_id":"100448992814","canonical_url":"https://tw.bid.yahoo.com/item/100448992814","title":"20A 車載變壓器 24V轉12V變壓器 / 轉換器","subtitle":null,"condition":"全新品","currency":"TWD","observed_at":"2026-05-15T09:52:28.055Z","current_price":340,"original_price":null,"stock_status":"out_of_stock","available_quantity":1,"sold_quantity":4,"seller":{"id":"Y0457983446","name":"胖貓","positive_rate":null,"rating_count":null},"images":[{"url":"https://img.yec.tw/ob/image/d82722b6-56fb-40ed-a642-2cf6bd971492.jpg","role":"main","alt":"商品主圖","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/74eb337a-b037-4911-aee9-756446e066b2.jpg","role":"detail","alt":"商品圖片 2","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/7c98aba4-651c-4e2b-8c09-0c99057b436b.jpg","role":"detail","alt":"商品圖片 3","width":null,"height":null}],"description":"車載降壓器一般也稱之為電源轉換器、直流變壓器、電源逆變器或電源降壓器等，其適用於24V電壓的環境中，將直流24V轉換為直流12V，如汽車音響，低音炮、導航儀、行車記錄儀、液晶電視，對講機及監控系統等使用12V的用電器轉換電源\n\n \n\n採用大功率集成開關穩壓模組為核心，能將不穩定的18—30V的直流電源轉換為穩定的12V直流電源輸出，具輸入過壓、輸出過流、過溫、輸出短路等自動保護功能，並在故障消除後恢復正常工作，斷電記憶。特別適合於24V改裝車用音響等使用，在使用過程中能有效地保護電器和汽車前路，當輸出電流超過額定輸出時，能迅速切斷輸出電路，切實保護用電設備的安全\n\n \n\n一般電器功率為120W，都會建議選用10Ａ的，\n\n但考慮由於帶有超溫保護的功能，若是用電器功率接近的或是等於相應產品輸出額定功率的話，會有燒壞電器可能，故建議使用更高電流20A的使用\n\n \n\n安裝使用方法：\n\nl       將降壓器置於通風乾燥的地方，並做好適當固定\n\nl       將24V輸入端與供電線路連接，紅色線接正極、黃色線接ACC啟動火線（車匙開關線，點火開關線），黑色線接負極/搭鐵\n\nl       將12V輸出端與12V的用電器連接，紅色線和黃色線接電器接正極，黑色線接用電器負極\n\nl       確認接線無誤，與有做好絕緣，再開啟電源給降壓器供電","shipping_methods":[{"name":"郵局掛號","fee":0,"currency":"TWD"},{"name":"萊爾富取貨付款","fee":0,"currency":"TWD"},{"name":"7-ELEVEN取貨付款","fee":0,"currency":"TWD"}],"lowest_shipping_fee":null,"payment_methods":["ATM轉帳","萊爾富取貨付款","7-ELEVEN取貨付款"],"category_id":"23453","category_name":"其他零組件","breadcrumb":[{"id":"23336","name":"電腦、平板與周邊","url":"/tw/%E9%9B%BB%E8%85%A6%E3%80%81%E5%B9%B3%E6%9D%BF%E8%88%87%E5%91%A8%E9%82%8A-23336-category.html"},{"id":"2092072521","name":"電腦零組件","url":"/tw/%E9%9B%BB%E8%85%A6%E9%9B%B6%E7%B5%84%E4%BB%B6-2092072521-category.html"},{"id":"23453","name":"其他零組件","url":"/tw/%E5%85%B6%E4%BB%96%E9%9B%B6%E7%B5%84%E4%BB%B6-23453-category.html"}],"view_count":0,"watch_count":3}