{"product_id":"zinsco-qb24-3030-u-30a-3p-240v","title":"ZINSCO QB24-3030 U 30A 240V 3-pole Molded Case Circuit Breaker QB243030","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"109\" data-end=\"125\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"126\" data-end=\"666\"\u003eThe Zinsco QB24-3030 U (also referenced as QB243030) is a 30 Amp, 3-pole molded case circuit breaker designed for use in Zinsco \/ GTE Sylvania panelboards. It operates on 240V systems and utilizes a thermal-magnetic trip mechanism (Magnatrip type) to \u003ca href=\"https:\/\/plgautomation.com\/collections\/power-supplies-protection\"\u003eprotect against overloads\u003c\/a\u003e and short circuits. This breaker is part of the QB24 series and features a bolt-on mounting design for a secure electrical connection to the panel bus. It is a legacy component and has been discontinued by the manufacturer. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"668\" data-end=\"685\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"686\" data-end=\"1090\"\u003eThe Zinsco QB24-3030 breaker is commonly used in commercial and industrial electrical systems for three-phase branch or feeder circuits requiring 30A protection. Typical applications include \u003ca href=\"https:\/\/plgautomation.com\/collections\/drives-motor-control\"\u003emotor control\u003c\/a\u003e panels, machinery circuits, pumps, and compressors. It is installed in Zinsco bolt-on panelboards and is now primarily used for maintenance or replacement of existing systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1092\" data-end=\"1121\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1122\" data-end=\"1905\"\u003e• Manufacturer: Zinsco \/ GTE Sylvania \/ Challenger\u003cbr data-start=\"1172\" data-end=\"1175\"\u003e• Model \/ Part Number: QB24-3030 U \/ QB243030\u003cbr data-start=\"1220\" data-end=\"1223\"\u003e• Product Type: Molded Case Circuit Breaker (Bolt-On)\u003cbr data-start=\"1276\" data-end=\"1279\"\u003e• Poles: 3-Pole \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1332\" data-end=\"1335\"\u003e• Current Rating: 30 Amps \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1398\" data-end=\"1401\"\u003e• Voltage Rating: 240 VAC \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1464\" data-end=\"1467\"\u003e• Phase: 3-phase \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1521\" data-end=\"1524\"\u003e• Interrupt Rating: ~10 kAIC @ 240V \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1597\" data-end=\"1600\"\u003e• Trip Type: Thermal-magnetic (LI – long-time \u0026amp; instantaneous) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1700\" data-end=\"1703\"\u003e• Mounting: Bolt-on (QB series) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1772\" data-end=\"1775\"\u003e• Function: Overcurrent and short circuit protection\u003cbr data-start=\"1827\" data-end=\"1830\"\u003e• Status: Obsolete \/ discontinued \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"1912\" data-end=\"1936\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"1937\" data-end=\"2083\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/square-d-qob330-u-30a-240v-3p?_pos=2\u0026amp;_psq=QOB330\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eSquare D QOB330 3-Pole 30A Bolt-On Circuit Breaker\u003c\/a\u003e\u003cbr data-start=\"1989\" data-end=\"1992\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/siemens-bqd330-3p-30a-circuit-breaker?_pos=1\u0026amp;_psq=BQD330\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eSiemens BQD330 3-Pole 30A Bolt-On Breaker\u003c\/a\u003e\u003cbr data-start=\"2035\" data-end=\"2038\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/eaton-bab3030h-3p-30a-bolt-on-circuit-breaker?_pos=3\u0026amp;_psq=BAB3030H\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eEaton BAB3030H 3-Pole 30A Bolt-On Breaker\u003c\/a\u003e\u003c\/p\u003e","brand":"ZINSCO","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51734994518318,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_2de190ca-0dae-4a53-8483-6ca322d82283.jpg?v=1770608033","url":"https:\/\/plgautomation.com\/products\/zinsco-qb24-3030-u-30a-3p-240v","provider":"PLG Automation ","version":"1.0","type":"link"}