{"product_id":"cooper-bussmann-jks-400-class-j-cartridge-fuse-400a-600v","title":"Cooper Bussmann JKS-400 Class J Cartridge Fuse 400A 600V","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe COOPER BUSSMANN JKS-400 is a Class J fast-acting cartridge fuse rated at 400 amps and 600 volts with a 200 kA RMS interrupting capacity. Designed for general-purpose overcurrent protection in industrial and commercial power distribution systems, this fuse provides reliable short-circuit protection where high fault-current capacity is required. The bolt-on mount design allows secure installation in Class J fuse holders and disconnect switches. At 7.125 inches overall length and 2 inches in diameter, it meets the dimensional standards required for Class J fuse block installations. Licensed electricians and industrial maintenance technicians are the primary installers.\u003c\/p\u003e\u003cp\u003eThis fuse is suited for use in commercial and industrial electrical distribution panels, motor branch circuits, and disconnect switches where Class J fuse protection is specified. Its fast-acting characteristics make it appropriate for loads that do not require time-delay protection, such as resistive and light inductive loads. The 200 kA interrupting rating supports high fault-current environments common in larger commercial facilities and industrial plants.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e400A continuous current rating at 600 volts AC\u003c\/li\u003e\n\u003cli\u003e200 kA RMS symmetrical interrupting capacity for high fault-current environments\u003c\/li\u003e\n\u003cli\u003eFast-acting fuse timing for immediate response to overload and short-circuit conditions\u003c\/li\u003e\n\u003cli\u003eBolt-on mount type for secure, vibration-resistant installation\u003c\/li\u003e\n\u003cli\u003eClass J form factor: 7.125 inches OAL, 2 inches diameter\u003c\/li\u003e\n\u003cli\u003eCE Certified, CSA Certified (Class 1422-02 File 53787), and UL Listed (Guide JDDZ File E4273)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a Class J cartridge fuse replacement for use in UL-listed Class J fuse holders, fusible disconnects, and combination motor controllers requiring 400A, 600V fast-acting overcurrent protection.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit at the upstream disconnect before removing or installing any fuse. Verify the fuse holder is rated for Class J fuses and confirm the fuse amperage and voltage ratings match the circuit requirements before installation. Do not substitute a different fuse class or a higher amperage rating to restore power after a fault without first identifying and clearing the fault condition.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Type\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Timing\u003c\/strong\u003e: Fast-Acting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Body Type\u003c\/strong\u003e: Cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 600V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating\u003c\/strong\u003e: 200 kA RMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: CE Certified; CSA Class 1422-02 File 53787 Certified; UL Listed Guide JDDZ File E4273\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 39121605\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: JKS-400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51693315031346,"sku":"JKS-400","price":696.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a2f19ea1febc6f8f263ca7ca376ae58c.jpg?v=1788310518","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-jks-400-class-j-cartridge-fuse-400a-600v","provider":"Voomi Supply","version":"1.0","type":"link"}