{"product_id":"mersen-a4j225-class-j-fast-acting-fuse-225a-600vac-300vdc-amp-trap®-blade-fuse","title":"Mersen A4J225 Class J Fast-Acting Fuse – 225A – 600VAC\/300VDC – Amp-Trap® Blade Fuse","description":"\u003cp data-start=\"110\" data-end=\"647\"\u003eThe Mersen A4J225 is an Amp-Trap® Class J fast-acting fuse engineered for high-performance protection of industrial and commercial power distribution systems. Rated at 225 Amps, this current-limiting fuse provides rapid response to short-circuit conditions, delivering superior protection for sensitive equipment, feeders, and branch circuits. With voltage ratings of 600VAC and 300VDC, it is designed for use in compact Class J fuse systems where high interrupting capacity and fast clearing performance are required.\u003c\/p\u003e\n\u003ch3 data-section-id=\"yc43s8\" data-start=\"649\" data-end=\"671\"\u003eVoltage and Rating\u003c\/h3\u003e\n\u003cul data-start=\"673\" data-end=\"830\"\u003e\n\u003cli data-section-id=\"1349rkx\" data-start=\"673\" data-end=\"701\"\u003eCurrent Rating: 225 Amps\u003c\/li\u003e\n\u003cli data-section-id=\"k5woin\" data-start=\"702\" data-end=\"737\"\u003eVoltage Rating: 600VAC \/ 300VDC\u003c\/li\u003e\n\u003cli data-section-id=\"12sfb1r\" data-start=\"738\" data-end=\"761\"\u003eFrequency: 50\/60 Hz\u003c\/li\u003e\n\u003cli data-section-id=\"lh2ska\" data-start=\"762\" data-end=\"785\"\u003eFuse Class: Class J\u003c\/li\u003e\n\u003cli data-section-id=\"125euby\" data-start=\"786\" data-end=\"830\"\u003eFuse Type: Fast-Acting, Current-Limiting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"uvdx3z\" data-start=\"832\" data-end=\"854\"\u003eKey Specifications\u003c\/h3\u003e\n\u003cul data-start=\"856\" data-end=\"1087\"\u003e\n\u003cli data-section-id=\"1auomsb\" data-start=\"856\" data-end=\"895\"\u003eProduct Type: Industrial Power Fuse\u003c\/li\u003e\n\u003cli data-section-id=\"3smyah\" data-start=\"896\" data-end=\"921\"\u003eSeries: Amp-Trap® A4J\u003c\/li\u003e\n\u003cli data-section-id=\"ncozgr\" data-start=\"922\" data-end=\"945\"\u003ePart Number: A4J225\u003c\/li\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"946\" data-end=\"987\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"jpwrkx\" data-start=\"988\" data-end=\"1013\"\u003eMounting Style: Blade\u003c\/li\u003e\n\u003cli data-section-id=\"sfpg4b\" data-start=\"1014\" data-end=\"1061\"\u003eResponse Type: Fast-Acting (non-time-delay)\u003c\/li\u003e\n\u003cli data-section-id=\"1ozdgpy\" data-start=\"1062\" data-end=\"1087\"\u003eCurrent Limiting: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nucr17\" data-start=\"1089\" data-end=\"1117\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1119\" data-end=\"1621\"\u003e\n\u003cli data-section-id=\"s7zb67\" data-start=\"1119\" data-end=\"1196\"\u003eProtection Type: Short-circuit and overcurrent protection (fast response)\u003c\/li\u003e\n\u003cli data-section-id=\"p3ps12\" data-start=\"1197\" data-end=\"1345\"\u003eApplication Suitability: Feeders, branch circuits, control panels, industrial distribution systems, and motor circuits requiring fast protection\u003c\/li\u003e\n\u003cli data-section-id=\"1ob6rtx\" data-start=\"1346\" data-end=\"1447\"\u003eCoordination Type: Designed for selective coordination with downstream devices in Class J systems\u003c\/li\u003e\n\u003cli data-section-id=\"8kaffc\" data-start=\"1448\" data-end=\"1542\"\u003eConstruction Features: High interrupting rating, compact footprint, low let-through energy\u003c\/li\u003e\n\u003cli data-section-id=\"vko5g3\" data-start=\"1543\" data-end=\"1621\"\u003eSystem Integration: Suitable for high-density industrial electrical panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nr5bwx\" data-start=\"1623\" data-end=\"1650\"\u003eStandards and Approvals\u003c\/h3\u003e\n\u003cul data-start=\"1652\" data-end=\"1725\"\u003e\n\u003cli data-section-id=\"11a7gqd\" data-start=\"1652\" data-end=\"1665\"\u003eUL Listed\u003c\/li\u003e\n\u003cli data-section-id=\"1ygh62h\" data-start=\"1666\" data-end=\"1683\"\u003eCSA Certified\u003c\/li\u003e\n\u003cli data-section-id=\"iz265n\" data-start=\"1684\" data-end=\"1725\"\u003eCompliant with Class J fuse standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1aljov1\" data-start=\"1727\" data-end=\"1743\"\u003eProduct Data\u003c\/h3\u003e\n\u003cul data-start=\"1745\" data-end=\"1862\"\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"1745\" data-end=\"1786\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"3smyah\" data-start=\"1787\" data-end=\"1812\"\u003eSeries: Amp-Trap® A4J\u003c\/li\u003e\n\u003cli data-section-id=\"ncozgr\" data-start=\"1813\" data-end=\"1836\"\u003ePart Number: A4J225\u003c\/li\u003e\n\u003cli data-section-id=\"1gjlfq2\" data-start=\"1837\" data-end=\"1862\"\u003eEAN\/UPC: 782001960384\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1864\" data-end=\"1880\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1882\" data-end=\"2186\"\u003e\n\u003cli data-section-id=\"1g63lej\" data-start=\"1882\" data-end=\"1923\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"1jabemj\" data-start=\"1924\" data-end=\"1953\"\u003eBranch circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"1qwmxre\" data-start=\"1954\" data-end=\"1983\"\u003eFeeder circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"xl7xzs\" data-start=\"1984\" data-end=\"2011\"\u003eControl panels and MCCs\u003c\/li\u003e\n\u003cli data-section-id=\"1p6eosi\" data-start=\"2012\" data-end=\"2067\"\u003eMotor circuit protection (fast-acting requirements)\u003c\/li\u003e\n\u003cli data-section-id=\"fgbk6c\" data-start=\"2068\" data-end=\"2110\"\u003eSwitchboards and switchgear assemblies\u003c\/li\u003e\n\u003cli data-section-id=\"sk3mdu\" data-start=\"2111\" data-end=\"2150\"\u003eCommercial electrical installations\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mersen","offers":[{"title":"NEW","offer_id":48494204453113,"sku":"A4J225","price":121.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/PHP-A4J225-Mersen-TIMG_jpg.webp?v=1780841090","url":"https:\/\/mycircuitbreakers.com\/products\/mersen-a4j225-class-j-fast-acting-fuse-225a-600vac-300vdc-amp-trap%c2%ae-blade-fuse","provider":"My Circuit Breakers","version":"1.0","type":"link"}