{"product_id":"mellow-24v-40w-heater-cartridge-104nt-4-thermistor-prusa-mk4","title":"Mellow 24V 40W Heater Cartridge \u0026 104NT-4 Thermistor – Prusa MK4","description":"\n\u003ch2\u003eMellow 24V 40W Heater Cartridge \u0026amp; 104NT-4 Thermistor Kit for Prusa MK4\u003c\/h2\u003e\n\u003cp\u003eKeep your Prusa MK4 3D printer running at peak performance with this genuine \u003cstrong\u003eMellow heater cartridge and 104NT-4 thermistor combo kit\u003c\/strong\u003e. Engineered specifically for the Prusa MK4 heating block, this kit delivers stable, accurate temperature control across a wide operating range — so you can print with confidence and consistency every time.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eHeater Cartridge Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 40W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Size:\u003c\/strong\u003e M6 × 12mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Length:\u003c\/strong\u003e 120mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Material:\u003c\/strong\u003e Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Temperature:\u003c\/strong\u003e 0–300°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe heater cartridge is manufactured using high-standard processing technology. The internal heating wire undergoes a specialized treatment process to ensure long-term stability and an extended service life — reducing downtime and the need for frequent replacements.\u003c\/p\u003e\n\n\u003ch3\u003e104NT-4 Thermistor Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 104NT-4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Size:\u003c\/strong\u003e M3 × 8mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Length:\u003c\/strong\u003e 110mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Measurable Temperature:\u003c\/strong\u003e Up to 300°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 104NT-4 thermistor provides highly accurate temperature readings up to 300°C, giving your printer's firmware the real-time data it needs for precise extrusion temperature management.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with:\u003c\/strong\u003e Prusa MK4 3D Printer Heating Block\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× M6×12mm Heater Cartridge (24V \/ 40W)\u003c\/li\u003e\n  \u003cli\u003e1× 104NT-4 Thermistor (M3×8mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose Mellow?\u003c\/h3\u003e\n\u003cp\u003eMellow is a dedicated 3D printer accessories brand with three core product lines: \u003cstrong\u003eNF Extruders\u003c\/strong\u003e, \u003cstrong\u003eNF Hotends\u003c\/strong\u003e, and \u003cstrong\u003eFLY Motherboards \u0026amp; Electronics\u003c\/strong\u003e. Their engineering team focuses on delivering components compatible with a wide range of 3D printers, ensuring reliable performance upgrades and replacements for makers and professionals alike.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/nitrile-work-gloves-anti-slip-full-finger-5-pair\"\u003e5-Pair Nitrile Work Gloves – Anti-Slip Full Finger Safety\u003c\/a\u003e — great for handling hot-end components safely\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/ball-end-hex-screwdriver-bit-magnetic-reduced-shank-steel\"\u003eBall End Hex Screwdriver Bit – Magnetic Reduced Shank Steel\u003c\/a\u003e — ideal for installing heater cartridges and thermistors\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/10-pack-65mm-oscillating-multi-tool-saw-blades-high-carbon-steel\"\u003e10-Pack 65mm Oscillating Multi-Tool Saw Blades | Carbon Steel\u003c\/a\u003e — a handy addition to any maker's toolkit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this heater cartridge and thermistor kit compatible with the Prusa MK4?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this kit is specifically designed and sized for the Prusa MK4 heating block. The M6×12mm heater cartridge and M3×8mm thermistor are direct-fit replacements for standard Prusa MK4 hotend components.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage and wattage does the Mellow heater cartridge support?\u003c\/h4\u003e\n\u003cp\u003eA: The heater cartridge operates at 24V and delivers 40W of heating power, matching the standard electrical specifications of the Prusa MK4 printer.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the maximum temperature the 104NT-4 thermistor can measure?\u003c\/h4\u003e\n\u003cp\u003eA: The 104NT-4 thermistor is capable of measuring temperatures up to 300°C, making it suitable for printing with a wide range of filament materials including PLA, PETG, ABS, and high-temperature filaments.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this kit require any assembly or soldering?\u003c\/h4\u003e\n\u003cp\u003eA: No assembly is required. Both the heater cartridge and thermistor come ready to install directly into the Prusa MK4 heating block using standard tools.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this heater cartridge and thermistor kit compatible with the Prusa MK4?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, this kit is specifically designed and sized for the Prusa MK4 heating block. 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Both the heater cartridge and thermistor come ready to install directly into the Prusa MK4 heating block using standard tools.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Mellow 24V 40W Heater Cartridge \u0026 104NT-4 Thermistor – Prusa MK4\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/products\/mellow-24v-40w-heater-cartridge-104nt-4-thermistor-prusa-mk4\"}]}\u003c\/script\u003e","brand":"Xpnd","offers":[{"title":"MK4 Heater","offer_id":67748602544365,"sku":"14:10#MK4 Heater","price":12.78,"currency_code":"USD","in_stock":true},{"title":"MK4 Temperature","offer_id":67748602577133,"sku":"14:29#MK4 Temperature","price":12.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0840\/1269\/5789\/files\/S764f1aed47834914a7f9658f11de9f24i_cbbf8677-97a6-4cc3-9198-10c7b2309442.webp?v=1791897332","url":"https:\/\/xpndservice.com\/products\/mellow-24v-40w-heater-cartridge-104nt-4-thermistor-prusa-mk4","provider":"XPND","version":"1.0","type":"link"}