{"product_id":"zinsco-qb24-qb-qb243020-3-pole-20-amp-240v-circuit-breaker","title":"Zinsco QB24 QB QB243020 3 Pole 20 amp 240v Circuit Breaker","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"113\" data-end=\"129\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"130\" data-end=\"610\"\u003eThe Zinsco QB243020 (QB24 series) is a 3-pole 20 Amp molded case circuit breaker designed for use in Zinsco \/ GTE Sylvania panelboards. It operates on 240 VAC three-phase systems and features a thermal-magnetic trip mechanism that protects against overloads and short circuits. Unlike the Q-series plug-in models, this breaker is a bolt-on type, providing a more secure mechanical and electrical connection to the bus bar in commercial and industrial panels.\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"612\" data-end=\"629\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"630\" data-end=\"1137\"\u003eThe QB243020 breaker is commonly used in industrial and commercial \u003ca href=\"https:\/\/plgautomation.com\/collections\/power-supplies-protection\"\u003eelectrical distribution systems\u003c\/a\u003e, including panelboards, motor control centers, and machinery circuits requiring 20A three-phase protection. It is suitable for protecting small \u003ca href=\"https:\/\/plgautomation.com\/collections\/drives-motor-control\"\u003emotors\u003c\/a\u003e, control panels, and balanced loads. As part of the Zinsco QB bolt-on series, it is typically found in older installations and is now obsolete, usually available only as surplus or reconditioned units. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1139\" data-end=\"1168\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1169\" data-end=\"1764\"\u003e• Manufacturer: Zinsco \/ GTE Sylvania \/ Challenger\u003cbr data-start=\"1219\" data-end=\"1222\"\u003e• Model \/ Part Number: QB243020 \/ QB24-3020\u003cbr data-start=\"1265\" data-end=\"1268\"\u003e• Product Type: Molded Case Circuit Breaker (Bolt-On)\u003cbr data-start=\"1321\" data-end=\"1324\"\u003e• Poles: 3-Pole \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1377\" data-end=\"1380\"\u003e• Current Rating: 20 Amps \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1443\" data-end=\"1446\"\u003e• Voltage Rating: 240 VAC \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1509\" data-end=\"1512\"\u003e• Phase: 3-phase\u003cbr data-start=\"1528\" data-end=\"1531\"\u003e• Mounting: Bolt-on (QB series)\u003cbr data-start=\"1562\" data-end=\"1565\"\u003e• Trip Type: Thermal-magnetic (LI – long-time \u0026amp; instantaneous)\u003cbr data-start=\"1627\" data-end=\"1630\"\u003e• Interrupt Rating: ~10 kAIC @ 240V\u003cbr data-start=\"1665\" data-end=\"1668\"\u003e• Application: Commercial \/ industrial distribution panels\u003cbr data-start=\"1726\" data-end=\"1729\"\u003e• Status: Discontinued \/ obsolete\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"1771\" data-end=\"1795\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"1796\" data-end=\"1942\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/square-d-20a-240v-3-pole-circuit-breaker-qob320?_pos=3\u0026amp;_psq=QOB320\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eSquare D QOB320 3-Pole 20A Bolt-On Circuit Breaker\u003c\/a\u003e\u003cbr data-start=\"1848\" data-end=\"1851\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/siemens-bqd320-3p-20a-bolt-on-circuit-breaker?_pos=2\u0026amp;_psq=BQD320\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eSiemens BQD320 3-Pole 20A Bolt-On Breaker\u003c\/a\u003e\u003cbr data-start=\"1894\" data-end=\"1897\"\u003e• \u003ca href=\"https:\/\/plgautomation.com\/products\/eaton-bab3020h-3p-20a-bolt-on-circuit-breaker?_pos=5\u0026amp;_psq=BAB3020H\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eEaton BAB3020H 3-Pole 20A Bolt-On Breaker\u003c\/a\u003e\u003c\/p\u003e","brand":"Zinsco","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51734998679854,"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_7d560e89-8514-4038-92d5-57e24c9d77f2.jpg?v=1770608050","url":"https:\/\/plgautomation.com\/products\/zinsco-qb24-qb-qb243020-3-pole-20-amp-240v-circuit-breaker","provider":"PLG Automation ","version":"1.0","type":"link"}