{"product_id":"mersen-a4j250-class-j-fast-acting-fuse-250a-600vac-300vdc-amp-trap®-blade-fuse","title":"Mersen A4J250 Class J Fast-Acting Fuse – 250A – 600VAC\/300VDC – Amp-Trap® Blade Fuse","description":"\u003cp data-start=\"110\" data-end=\"632\"\u003eThe Mersen A4J250 is an Amp-Trap® Class J fast-acting fuse designed for high-performance protection in industrial and commercial electrical distribution systems. Rated at 250 Amps, this current-limiting fuse provides rapid interruption of fault currents to protect sensitive equipment and downstream circuits. With voltage ratings of 600VAC and 300VDC, it is suitable for use in Class J fuse applications requiring compact size, high interrupting capacity, and fast response to short-circuit conditions.\u003c\/p\u003e\n\u003ch3 data-section-id=\"yc43s8\" data-start=\"634\" data-end=\"656\"\u003eVoltage and Rating\u003c\/h3\u003e\n\u003cul data-start=\"658\" data-end=\"815\"\u003e\n\u003cli data-section-id=\"c4tn2b\" data-start=\"658\" data-end=\"686\"\u003eCurrent Rating: 250 Amps\u003c\/li\u003e\n\u003cli data-section-id=\"k5woin\" data-start=\"687\" data-end=\"722\"\u003eVoltage Rating: 600VAC \/ 300VDC\u003c\/li\u003e\n\u003cli data-section-id=\"12sfb1r\" data-start=\"723\" data-end=\"746\"\u003eFrequency: 50\/60 Hz\u003c\/li\u003e\n\u003cli data-section-id=\"lh2ska\" data-start=\"747\" data-end=\"770\"\u003eFuse Class: Class J\u003c\/li\u003e\n\u003cli data-section-id=\"125euby\" data-start=\"771\" data-end=\"815\"\u003eFuse Type: Fast-Acting, Current-Limiting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"uvdx3z\" data-start=\"817\" data-end=\"839\"\u003eKey Specifications\u003c\/h3\u003e\n\u003cul data-start=\"841\" data-end=\"1072\"\u003e\n\u003cli data-section-id=\"1auomsb\" data-start=\"841\" data-end=\"880\"\u003eProduct Type: Industrial Power Fuse\u003c\/li\u003e\n\u003cli data-section-id=\"3smyah\" data-start=\"881\" data-end=\"906\"\u003eSeries: Amp-Trap® A4J\u003c\/li\u003e\n\u003cli data-section-id=\"ncmqsp\" data-start=\"907\" data-end=\"930\"\u003ePart Number: A4J250\u003c\/li\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"931\" data-end=\"972\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"jpwrkx\" data-start=\"973\" data-end=\"998\"\u003eMounting Style: Blade\u003c\/li\u003e\n\u003cli data-section-id=\"sfpg4b\" data-start=\"999\" data-end=\"1046\"\u003eResponse Type: Fast-Acting (non-time-delay)\u003c\/li\u003e\n\u003cli data-section-id=\"1ozdgpy\" data-start=\"1047\" data-end=\"1072\"\u003eCurrent Limiting: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nucr17\" data-start=\"1074\" data-end=\"1102\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1104\" data-end=\"1548\"\u003e\n\u003cli data-section-id=\"1rj860z\" data-start=\"1104\" data-end=\"1185\"\u003eProtection Type: Overcurrent and short-circuit protection (fast interruption)\u003c\/li\u003e\n\u003cli data-section-id=\"k1j80o\" data-start=\"1186\" data-end=\"1298\"\u003eApplication Suitability: Feeders, branch circuits, control panels, MCCs, and industrial distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"1o6swvq\" data-start=\"1299\" data-end=\"1372\"\u003eCoordination Type: Supports selective coordination in Class J systems\u003c\/li\u003e\n\u003cli data-section-id=\"193fu56\" data-start=\"1373\" data-end=\"1466\"\u003eConstruction Features: Compact design, high interrupting capacity, low let-through energy\u003c\/li\u003e\n\u003cli data-section-id=\"8puo4x\" data-start=\"1467\" data-end=\"1548\"\u003eSystem Integration: Suitable for modern high-density electrical panel layouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nr5bwx\" data-start=\"1550\" data-end=\"1577\"\u003eStandards and Approvals\u003c\/h3\u003e\n\u003cul data-start=\"1579\" data-end=\"1655\"\u003e\n\u003cli data-section-id=\"11a7gqd\" data-start=\"1579\" data-end=\"1592\"\u003eUL Listed\u003c\/li\u003e\n\u003cli data-section-id=\"1ygh62h\" data-start=\"1593\" data-end=\"1610\"\u003eCSA Certified\u003c\/li\u003e\n\u003cli data-section-id=\"1wpl8un\" data-start=\"1611\" data-end=\"1655\"\u003eCompliant with Class J fuse requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1aljov1\" data-start=\"1657\" data-end=\"1673\"\u003eProduct Data\u003c\/h3\u003e\n\u003cul data-start=\"1675\" data-end=\"1792\"\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"1675\" data-end=\"1716\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"3smyah\" data-start=\"1717\" data-end=\"1742\"\u003eSeries: Amp-Trap® A4J\u003c\/li\u003e\n\u003cli data-section-id=\"ncmqsp\" data-start=\"1743\" data-end=\"1766\"\u003ePart Number: A4J250\u003c\/li\u003e\n\u003cli data-section-id=\"1gjnq66\" data-start=\"1767\" data-end=\"1792\"\u003eEAN\/UPC: 782001960391\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1794\" data-end=\"1810\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1812\" data-end=\"2108\"\u003e\n\u003cli data-section-id=\"1g63lej\" data-start=\"1812\" data-end=\"1853\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"1jabemj\" data-start=\"1854\" data-end=\"1883\"\u003eBranch circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"1gvphnz\" data-start=\"1884\" data-end=\"1913\"\u003eFeeder protection systems\u003c\/li\u003e\n\u003cli data-section-id=\"18xv2zo\" data-start=\"1914\" data-end=\"1946\"\u003eMotor control centers (MCCs)\u003c\/li\u003e\n\u003cli data-section-id=\"fz1c8t\" data-start=\"1947\" data-end=\"1982\"\u003eControl panels and switchboards\u003c\/li\u003e\n\u003cli data-section-id=\"sk3mdu\" data-start=\"1983\" data-end=\"2022\"\u003eCommercial electrical installations\u003c\/li\u003e\n\u003cli data-section-id=\"14cfsx6\" data-start=\"2023\" data-end=\"2082\"\u003eEquipment protection in high fault current environments\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mersen","offers":[{"title":"NEW","offer_id":48494205108473,"sku":"A4J250","price":121.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/PHP-A4J250-Mersen-TIMG_jpg.webp?v=1780841212","url":"https:\/\/mycircuitbreakers.com\/products\/mersen-a4j250-class-j-fast-acting-fuse-250a-600vac-300vdc-amp-trap%c2%ae-blade-fuse","provider":"My Circuit Breakers","version":"1.0","type":"link"}