{"product_id":"cooper-bussmann-lps-rk-40sp-40a-rk1-time-delay-cartridge-fuse","title":"Cooper Bussmann LPS-RK-40SP 40A RK1 Time Delay Cartridge Fuse","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe COOPER BUSSMANN LPS-RK-40SP is a Class RK1 time delay cartridge fuse rated at 40 amps. It is designed for general-purpose overcurrent protection in industrial, commercial, and residential electrical systems. The cartridge body measures 27 millimeters in diameter and 5.5 inches in overall length, housing a dual-element construction that provides time delay performance. This fuse handles an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), making it suitable for circuits with high available fault current. Licensed electricians and industrial maintenance technicians are the primary installers of this fuse class.\u003c\/p\u003e\n\u003cp\u003eThe LPS-RK-40SP is used in fuse holders and fusible disconnects where RK1 class overcurrent protection is specified. Its time delay characteristic allows motors and other inductive loads to start without nuisance opening while still providing fast response to sustained overloads and short circuits. Typical applications include motor branch circuits, feeder panels, and control panels in commercial and light industrial facilities where a 40-amp RK1 fuse is required by design or code.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eClass RK1 rating provides superior current-limiting performance compared to standard Class RK5 fuses\u003c\/li\u003e\n  \u003cli\u003eTime delay dual-element design allows motor inrush without nuisance opening\u003c\/li\u003e\n  \u003cli\u003eHigh interrupting rating: 100 kA at DC and 300 kA at AC (RMS)\u003c\/li\u003e\n  \u003cli\u003eCartridge body: 27 millimeters diameter, 5.5 inches overall length\u003c\/li\u003e\n  \u003cli\u003eNon-indicating design for standard fusible disconnect and fuse holder installations\u003c\/li\u003e\n  \u003cli\u003eCertified to UL, CSA, and CE standards for broad application compliance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in fuse holders and fusible disconnect switches that accept Class RK1 cartridge fuses at 40 amps. Consult the disconnect or fuse holder manufacturer specifications to confirm fitment before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a licensed electrician in accordance with the NEC and any applicable local electrical codes. De-energize and lock out the circuit at the upstream disconnect before removing or installing the fuse. Use an appropriately rated fuse puller for cartridge-style fuses — do not handle energized fuses with bare hands or standard pliers. Verify that the fuse holder or disconnect is rated for Class RK1 fuses at the circuit voltage and amperage before installing.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: RK1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 40 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: 5.5 inches (139.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e: 27.00 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: 0.32 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: UL Listed (Guide JDDZ, File E4273), CSA C22.2 No. 248.12 Class 1422-02 File 53787, CE Certified\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: LPS-RK-40SP\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51704635818290,"sku":"LPS-RK-40SP","price":472.92,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/37bca8e6a2364c23a1e6b9b3b05a63fe.jpg?v=1788423959","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-lps-rk-40sp-40a-rk1-time-delay-cartridge-fuse","provider":"Voomi Supply","version":"1.0","type":"link"}