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{"id":7061359788191,"title":"270 OHM 5W Ceramic Resistor, Mojotone","handle":"wirewound-ceramic-5w-270-ohm-resistor","description":"\u003cp\u003e\u003cstrong\u003e270 OHM 5W Ceramic Resistor, Mojotone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb data-mce-fragment=\"1\"\u003eWirewound Resistors\u003c\/b\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWirewound resistors are commonly made by winding a metal wire, usually nichrome, around a ceramic, plastic, or fiberglass core. The ends of the wire are soldered or welded to two caps or rings, attached to the ends of the core. The assembly is protected with a layer of paint, molded plastic, or an enamel coating baked at high temperature. These resistors are designed to withstand unusually high temperatures of up to 450 °C. Wire leads in low power wirewound resistors are usually between 0.6 and 0.8 mm in diameter and tinned for ease of soldering. For higher power wirewound resistors, either a ceramic outer case or an aluminum outer case on top of an insulating layer is used – if the outer case is ceramic, such resistors are sometimes described as \"cement\" resistors, though they do not actually contain any traditional cement. The aluminum-cased types are designed to be attached to a heat sink to dissipate the heat; the rated power is dependent on being used with a suitable heat sink, e.g., a 50 W power rated resistor will overheat at a fraction of the power dissipation if not used with a heat sink. Large wirewound resistors may be rated for 1,000 watts or more.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eBecause wirewound resistors are coils they have more undesirable inductance than other types of resistor, although winding the wire in sections with alternately reversed direction can minimize inductance. Other techniques employ bifilar winding, or a flat thin former (to reduce cross-section area of the coil). For the most demanding circuits, resistors with Ayrton-Perry winding are used.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eApplications of wirewound resistors are similar to those of composition resistors with the exception of the high frequency. The high frequency response of wirewound resistors is substantially worse than that of a composition resistor.\u003c\/span\u003e\u003c\/p\u003e","published_at":"2022-11-30T16:01:39+00:00","created_at":"2021-09-11T10:47:12+01:00","vendor":"Mojotone","type":"Resistor","tags":["Amp parts \u0026 accessories - general","capacitors-for-amps","mojo-to-sort","mojoclearout","mojotone"],"price":109,"price_min":109,"price_max":109,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":41021810770079,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"7293004","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"270 OHM 5W Ceramic Resistor, Mojotone","public_title":null,"options":["Default Title"],"price":109,"weight":0,"compare_at_price":null,"inventory_quantity":10,"inventory_management":"shopify","inventory_policy":"deny","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.allparts.uk.com\/cdn\/shop\/products\/7293004_1.jpg?v=1669824118"],"featured_image":"\/\/www.allparts.uk.com\/cdn\/shop\/products\/7293004_1.jpg?v=1669824118","options":["Title"],"media":[{"alt":null,"id":31400233402598,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.allparts.uk.com\/cdn\/shop\/products\/7293004_1.jpg?v=1669824118"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.allparts.uk.com\/cdn\/shop\/products\/7293004_1.jpg?v=1669824118","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cstrong\u003e270 OHM 5W Ceramic Resistor, Mojotone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb data-mce-fragment=\"1\"\u003eWirewound Resistors\u003c\/b\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWirewound resistors are commonly made by winding a metal wire, usually nichrome, around a ceramic, plastic, or fiberglass core. The ends of the wire are soldered or welded to two caps or rings, attached to the ends of the core. The assembly is protected with a layer of paint, molded plastic, or an enamel coating baked at high temperature. These resistors are designed to withstand unusually high temperatures of up to 450 °C. Wire leads in low power wirewound resistors are usually between 0.6 and 0.8 mm in diameter and tinned for ease of soldering. For higher power wirewound resistors, either a ceramic outer case or an aluminum outer case on top of an insulating layer is used – if the outer case is ceramic, such resistors are sometimes described as \"cement\" resistors, though they do not actually contain any traditional cement. The aluminum-cased types are designed to be attached to a heat sink to dissipate the heat; the rated power is dependent on being used with a suitable heat sink, e.g., a 50 W power rated resistor will overheat at a fraction of the power dissipation if not used with a heat sink. Large wirewound resistors may be rated for 1,000 watts or more.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eBecause wirewound resistors are coils they have more undesirable inductance than other types of resistor, although winding the wire in sections with alternately reversed direction can minimize inductance. Other techniques employ bifilar winding, or a flat thin former (to reduce cross-section area of the coil). For the most demanding circuits, resistors with Ayrton-Perry winding are used.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eApplications of wirewound resistors are similar to those of composition resistors with the exception of the high frequency. The high frequency response of wirewound resistors is substantially worse than that of a composition resistor.\u003c\/span\u003e\u003c\/p\u003e"}
