{"product_id":"mersen-a4bq400-class-l-time-delay-fuse-400a-600vac-500vdc-amp-trap-2000®-blade-fuse","title":"Mersen A4BQ400 Class L Time-Delay Fuse – 400A – 600VAC\/500VDC – Amp-Trap 2000® Blade Fuse","description":"\u003cp data-start=\"115\" data-end=\"693\"\u003eThe Mersen A4BQ400 is a high-performance Amp-Trap 2000® Class L time-delay fuse designed for industrial and commercial power distribution systems requiring reliable overcurrent protection. Rated at 400 Amps, this fuse provides time-delay characteristics to accommodate motor starting currents and transformer inrush while delivering fast, current-limiting protection under fault conditions. With voltage ratings of 600VAC and 500VDC, it is suitable for feeder circuits, service entrances, and main distribution equipment in medium-to-large electrical systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"yc43s8\" data-start=\"695\" data-end=\"717\"\u003eVoltage and Rating\u003c\/h3\u003e\n\u003cul data-start=\"719\" data-end=\"875\"\u003e\n\u003cli data-section-id=\"1om46o0\" data-start=\"719\" data-end=\"747\"\u003eCurrent Rating: 400 Amps\u003c\/li\u003e\n\u003cli data-section-id=\"1jrwfrt\" data-start=\"748\" data-end=\"783\"\u003eVoltage Rating: 600VAC \/ 500VDC\u003c\/li\u003e\n\u003cli data-section-id=\"12sfb1r\" data-start=\"784\" data-end=\"807\"\u003eFrequency: 50\/60 Hz\u003c\/li\u003e\n\u003cli data-section-id=\"lh2u8s\" data-start=\"808\" data-end=\"831\"\u003eFuse Class: Class L\u003c\/li\u003e\n\u003cli data-section-id=\"1uahc1k\" data-start=\"832\" data-end=\"875\"\u003eFuse Type: Time-Delay, Current-Limiting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"uvdx3z\" data-start=\"877\" data-end=\"899\"\u003eKey Specifications\u003c\/h3\u003e\n\u003cul data-start=\"901\" data-end=\"1163\"\u003e\n\u003cli data-section-id=\"1auomsb\" data-start=\"901\" data-end=\"940\"\u003eProduct Type: Industrial Power Fuse\u003c\/li\u003e\n\u003cli data-section-id=\"1n6zvlu\" data-start=\"941\" data-end=\"972\"\u003eSeries: Amp-Trap 2000® A4BQ\u003c\/li\u003e\n\u003cli data-section-id=\"coajlf\" data-start=\"973\" data-end=\"997\"\u003ePart Number: A4BQ400\u003c\/li\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"998\" data-end=\"1039\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"jpwrkx\" data-start=\"1040\" data-end=\"1065\"\u003eMounting Style: Blade\u003c\/li\u003e\n\u003cli data-section-id=\"p9w8f\" data-start=\"1066\" data-end=\"1137\"\u003eTime-Delay Capability: Yes (motor and transformer inrush tolerance)\u003c\/li\u003e\n\u003cli data-section-id=\"1ozdgpy\" data-start=\"1138\" data-end=\"1163\"\u003eCurrent Limiting: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nucr17\" data-start=\"1165\" data-end=\"1193\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1195\" data-end=\"1630\"\u003e\n\u003cli data-section-id=\"1qu4uul\" data-start=\"1195\" data-end=\"1256\"\u003eProtection Type: Overcurrent and short-circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"12hru46\" data-start=\"1257\" data-end=\"1361\"\u003eApplication Suitability: Main service protection, feeders, transformers, and industrial switchboards\u003c\/li\u003e\n\u003cli data-section-id=\"u9zm23\" data-start=\"1362\" data-end=\"1437\"\u003eCoordination Type: Selective coordination in power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"14bcl2n\" data-start=\"1438\" data-end=\"1547\"\u003eConstruction Features: High interrupting capacity, low let-through energy, robust industrial-grade design\u003c\/li\u003e\n\u003cli data-section-id=\"o6bhth\" data-start=\"1548\" data-end=\"1630\"\u003eSystem Integration: Designed for commercial and industrial electrical networks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nr5bwx\" data-start=\"1632\" data-end=\"1659\"\u003eStandards and Approvals\u003c\/h3\u003e\n\u003cul data-start=\"1661\" data-end=\"1745\"\u003e\n\u003cli data-section-id=\"11a7gqd\" data-start=\"1661\" data-end=\"1674\"\u003eUL Listed\u003c\/li\u003e\n\u003cli data-section-id=\"1ygh62h\" data-start=\"1675\" data-end=\"1692\"\u003eCSA Certified\u003c\/li\u003e\n\u003cli data-section-id=\"1s8g7gu\" data-start=\"1693\" data-end=\"1745\"\u003eCompliant with Class L fuse protection standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1aljov1\" data-start=\"1747\" data-end=\"1763\"\u003eProduct Data\u003c\/h3\u003e\n\u003cul data-start=\"1765\" data-end=\"1884\"\u003e\n\u003cli data-section-id=\"1rqx052\" data-start=\"1765\" data-end=\"1806\"\u003eManufacturer: Mersen \/ Ferraz Shawmut\u003c\/li\u003e\n\u003cli data-section-id=\"8n4nj8\" data-start=\"1807\" data-end=\"1833\"\u003eSeries: Amp-Trap 2000®\u003c\/li\u003e\n\u003cli data-section-id=\"coajlf\" data-start=\"1834\" data-end=\"1858\"\u003ePart Number: A4BQ400\u003c\/li\u003e\n\u003cli data-section-id=\"1max1p6\" data-start=\"1859\" data-end=\"1884\"\u003eEAN\/UPC: 782001930684\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1886\" data-end=\"1902\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1904\" data-end=\"2184\"\u003e\n\u003cli data-section-id=\"1g63lej\" data-start=\"1904\" data-end=\"1945\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"1dzpfyw\" data-start=\"1946\" data-end=\"1978\"\u003eCommercial electrical panels\u003c\/li\u003e\n\u003cli data-section-id=\"xn5rq9\" data-start=\"1979\" data-end=\"2013\"\u003eMain feeder circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"13cmzo7\" data-start=\"2014\" data-end=\"2040\"\u003eTransformer protection\u003c\/li\u003e\n\u003cli data-section-id=\"1d91hbl\" data-start=\"2041\" data-end=\"2069\"\u003eMotor protection systems\u003c\/li\u003e\n\u003cli data-section-id=\"1uedzx8\" data-start=\"2070\" data-end=\"2101\"\u003eSwitchboards and switchgear\u003c\/li\u003e\n\u003cli data-section-id=\"idmerf\" data-start=\"2102\" data-end=\"2148\"\u003eCritical infrastructure electrical systems\u003c\/li\u003e\n\u003cli data-section-id=\"1vnrfac\" data-start=\"2149\" data-end=\"2184\"\u003eHigh fault current environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2186\" data-end=\"2332\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Mersen","offers":[{"title":"NEW","offer_id":48493989986553,"sku":"A4BQ400","price":834.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/PHP-A4BQ400-Mersen-TIMG_jpg.webp?v=1780835265","url":"https:\/\/mycircuitbreakers.com\/products\/mersen-a4bq400-class-l-time-delay-fuse-400a-600vac-500vdc-amp-trap-2000%c2%ae-blade-fuse","provider":"My Circuit Breakers","version":"1.0","type":"link"}