{"product_id":"rxef110-resettable-ptc-fuse-1-1a-72v","title":"RXEF110 Resettable PTC Fuse - 1.1A Hold, 72V Radial Polyfuse","description":"\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\n\u003cp class=\"nznpd__intro\"\u003eThe Littelfuse RXEF110 is a resettable PTC fuse, often called a polyfuse, for low-voltage DC and AC circuits up to 72V. It carries 1.1A continuously at 20°C and trips at 2.2A or more, limiting the current to a trickle until the fault is cleared. Once power is removed and it cools, it resets by itself, so a short on a 12V or 24V project, a motor stall or a wiring mistake does not leave you hunting for a spare fuse.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003ePart number\u003c\/span\u003e\u003cstrong\u003eLittelfuse PolySwitch RXEF110, marked X110\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eType\u003c\/span\u003e\u003cstrong\u003eResettable PPTC fuse, radial leaded, not polarised\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eHold current\u003c\/span\u003e\u003cstrong\u003e1.10A at 20°C (0.89A at 40°C, 0.69A at 60°C)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTrip current\u003c\/span\u003e\u003cstrong\u003e2.20A at 20°C\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMaximum voltage\u003c\/span\u003e\u003cstrong\u003e72V DC or 72V AC rms\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMaximum fault current\u003c\/span\u003e\u003cstrong\u003e40A at rated voltage\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTime to trip\u003c\/span\u003e\u003cstrong\u003e8.2 seconds maximum at 5.5A, 20°C\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eResistance\u003c\/span\u003e\u003cstrong\u003e0.15 to 0.25 ohm new, up to 0.38 ohm one hour after a trip\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003ePower while tripped\u003c\/span\u003e\u003cstrong\u003e1.5W typical\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eOperating temperature\u003c\/span\u003e\u003cstrong\u003e-40°C to 85°C\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eBody\u003c\/span\u003e\u003cstrong\u003e12.8mm wide and 3.0mm thick maximum, flame-retardant epoxy (UL94 V-0)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eLeads\u003c\/span\u003e\u003cstrong\u003e2 tin-plated copper, 0.81mm (20 AWG), about 5mm spacing\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003ca class=\"nznpd__dsbar\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/RXEF110-PTC-Fuse-Datasheet-v1.pdf\" target=\"_blank\" rel=\"noopener\" aria-label=\"Download the RXEF110 resettable PTC fuse technical datasheet (PDF)\"\u003e\n\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\n\u003cspan\u003eFull technical datasheet, derating table and dimensions\u003c\/span\u003e\n\u003cspan class=\"nznpd__dsmeta\"\u003ePDF\u003csvg width=\"17\" height=\"17\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4\"\u003e\u003c\/path\u003e\u003cpolyline points=\"7 10 12 15 17 10\"\u003e\u003c\/polyline\u003e\u003cline x1=\"12\" y1=\"15\" x2=\"12\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/span\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eWhat's in the box\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__included\"\u003e\n\u003cdiv class=\"nznpd__qty\"\u003e5+\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRXEF110 resettable fuses\u003c\/strong\u003e\u003cp\u003eSold per fuse with a minimum of 5. You receive the quantity you order, loose in a clear bag.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eGreat for\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__uses\"\u003e\n\u003cdiv class=\"nznpd__use\"\u003eProtecting the 12V feed to an LED strip or fan\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eShort-circuit protection on a breadboard power rail\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eFusing a small DC motor or pump circuit\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eGuarding a 5V USB-powered Arduino or ESP32 build\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eSensor, alarm and control wiring up to 24V\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eProtecting the output of a small 24V power supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eWiring \u0026amp; getting started\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eCheck the size\u003c\/strong\u003e\u003cp\u003eYour circuit's normal current must stay below the hold current at the hottest temperature the fuse will sit in: 1.1A at 20°C, 0.89A at 40°C, 0.69A at 60°C. A fault needs to draw 2.2A or more to trip it.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eWire it in series\u003c\/strong\u003e\u003cp\u003eFit it in the positive supply line, as close to the power source as you can. Either lead can go to the supply side.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eSolder by hand\u003c\/strong\u003e\u003cp\u003eThe leads take normal hand or wave soldering. Keep it out of reflow ovens and away from hot parts, as extra heat lowers the current it will hold.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eResetting after a trip\u003c\/strong\u003e\u003cp\u003eA tripped fuse runs warm and passes only a small current. Remove the power or clear the fault, let it cool and it is ready to use again.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cp class=\"nznpd__note\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e For low-voltage circuits only. Never use it on 230V mains wiring, and keep the possible short-circuit current at or below 40A.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Littelfuse","offers":[{"title":"Default Title","offer_id":67618361245792,"sku":"FUSE-PTC-RXEF110","price":1.19,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/rxef110-resettable-ptc-fuse-5-pack.png?v=1791198396","url":"https:\/\/www.nznelectronics.co.nz\/products\/rxef110-resettable-ptc-fuse-1-1a-72v","provider":"NZN Electronics","version":"1.0","type":"link"}