RDCHR型串聯電伴熱帶是(shi)一(yi)種由芯線(xian)(xian)發熱體的(de)(de)(de)電(dian)(dian)熱產(chan)品，即在具有一(yi)定(ding)電(dian)(dian)阻(zu)的(de)(de)(de)芯線(xian)(xian)上(shang)通(tong)過電(dian)(dian)流，芯線(xian)(xian)就發出焦(jiao)耳熱，由于(yu)芯線(xian)(xian)單位長(chang)度的(de)(de)(de)電(dian)(dian)阻(zu)和通(tong)過的(de)(de)(de)電(dian)(dian)流。在整(zheng)個長(chang)度上(shang)是(shi)相等(deng)的(de)(de)(de)，各處的(de)(de)(de)發熱量也(ye)就是(shi)相等(deng)的(de)(de)(de)，不會如并聯型電(dian)(dian)加熱隨著使用(yong)長(chang)度的(de)(de)(de)增加造(zao)成(cheng)尾端功率低，因此它(ta)主要適用(yong)于(yu)長(chang)距離管(guan)線(xian)(xian)的(de)(de)(de)伴熱保溫(wen)，用(yong)一(yi)個電(dian)(dian)源點供(gong)電(dian)(dian)。