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白城電(dian)(dian)(dian)伴熱(re)(re)(re)(re) 中溫自(zi)限溫伴熱(re)(re)(re)(re)帶材(cai)(cai)料結構 自(zi)限溫電(dian)(dian)(dian)伴熱(re)(re)(re)(re)帶（簡稱電(dian)(dian)(dian)伴熱(re)(re)(re)(re)帶）是長帶狀限溫電(dian)(dian)(dian)加(jia)熱(re)(re)(re)(re)器，其(qi)發熱(re)(re)(re)(re)材(cai)(cai)料的(de)電(dian)(dian)(dian)阻率具有很高的(de)正溫度系(xi)數（PTC），其(qi)結構見圖。在(zai)二根平行的(de)金屬(shu)線芯之(zhi)間均勻(yun)地擠(ji)塑半導電(dian)(dian)(dian)的(de)高分(fen)子復(fu)合PTC材(cai)(cai)料，在(zai)其(qi)外面再包一(yi)層絕(jue)緣材(cai)(cai)料作為護套，便得(de)到可(ke)以使用的(de)基(ji)本(ben)型電(dian)(dian)(dian)電(dian)(dian)(dian)伴熱(re)(re)(re)(re)帶，如有必要也可(ke)再加(jia)屏蔽(bi)及防護層