{"product_id":"cooper-bussmann-lpj-4sp-class-j-time-delay-fuse-4a","title":"Cooper Bussmann LPJ-4SP Class J Time Delay Fuse 4A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe COOPER BUSSMANN LPJ-4SP is a Class J time-delay cartridge fuse rated at 4 amps, designed for general-purpose overcurrent protection in industrial and commercial electrical systems. It provides a two-element time-delay response, allowing temporary inrush currents to pass without nuisance tripping while still protecting downstream equipment from sustained overloads and short-circuit faults. The LPJ-4SP carries an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), making it suitable for high-fault-current environments. The cartridge body measures 20.6 mm in diameter and 57.2 mm in length, mounting in a standard Class J fuse holder.\u003c\/p\u003e\n\u003cp\u003eThis fuse is used in commercial and industrial electrical panels, motor branch circuits, control panels, and equipment requiring Class J fuse protection. Its time-delay characteristic suits motor loads, transformers, and other inductive loads that draw elevated startup current. Licensed electricians typically install this fuse as part of a properly rated Class J fuse holder assembly in systems where high interrupting capacity and compact form factor are both required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eClass J rating with 300 kA AC (RMS) interrupting capacity for high-fault-current applications\u003c\/li\u003e\n  \u003cli\u003eTime-delay two-element design prevents nuisance tripping on motor inrush and transformer magnetizing current\u003c\/li\u003e\n  \u003cli\u003eNon-indicating body keeps form factor compact for tight panel installations\u003c\/li\u003e\n  \u003cli\u003eMounts in standard Class J fuse holders\u003c\/li\u003e\n  \u003cli\u003eUL Listed (Guide JDDZ, File E4273), CSA Certified, CE Certified, and RoHS Compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard Class J fuse holders. Compatible with any panel, disconnect, or control enclosure rated for Class J cartridge fuses at 4 amps.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed electrician in accordance with the NEC and applicable local codes. De-energize and lock out the circuit before removing or installing any fuse. Verify that the fuse holder is rated for Class J fuses and that the circuit voltage and amperage do not exceed the fuse ratings. Do not substitute a fuse of a different class or higher amperage rating as a replacement.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: J\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 4 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Timing\u003c\/strong\u003e: Time Delay\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Body Type\u003c\/strong\u003e: Cartridge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Elements\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupting Rating (AC RMS)\u003c\/strong\u003e: 300 kA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupting Rating (DC)\u003c\/strong\u003e: 100 kA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.25 inches (57.2 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e: 0.811 inches (20.6 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Fuse Holder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndicating\u003c\/strong\u003e: Non-Indicating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: UL Listed Guide JDDZ File E4273, CSA 22.2 No.248, CSA Class 1422-02 File 53787, CE Certified, RoHS Compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: COOPER BUSSMANN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: LPJ-4SP\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51720684405042,"sku":"LPJ-4SP","price":867.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92c2fbca8ccfc9aae7052775c7308d0b.jpg?v=1788567644","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-lpj-4sp-class-j-time-delay-fuse-4a","provider":"Voomi Supply","version":"1.0","type":"link"}