散(san)熱(re)(re)片(pian)是一(yi)種給電(dian)(dian)(dian)器中(zhong)(zhong)(zhong)的易發熱(re)(re)電(dian)(dian)(dian)子元(yuan)件散(san)熱(re)(re)的裝置，多(duo)由鋁合(he)金，黃銅(tong)或青銅(tong)做成板狀(zhuang)(zhuang)，片(pian)狀(zhuang)(zhuang)，多(duo)片(pian)狀(zhuang)(zhuang)等，如電(dian)(dian)(dian)腦(nao)中(zhong)(zhong)(zhong)CPU中(zhong)(zhong)(zhong)央處理器要使(shi)(shi)用(yong)相當大的散(san)熱(re)(re)片(pian)，電(dian)(dian)(dian)視機(ji)中(zhong)(zhong)(zhong)電(dian)(dian)(dian)源管，行(xing)管，功放器中(zhong)(zhong)(zhong)的功放管都要使(shi)(shi)用(yong)散(san)熱(re)(re)片(pian)。一(yi)般散(san)熱(re)(re)片(pian)在使(shi)(shi)用(yong)中(zhong)(zhong)(zhong)要在電(dian)(dian)(dian)子元(yuan)件與散(san)熱(re)(re)片(pian)接觸面(mian)涂上一(yi)層(ceng)導熱(re)(re)硅脂，使(shi)(shi)元(yuan)器件發出的熱(re)(re)量更有效地傳導到散(san)熱(re)(re)片(pian)上，再經散(san)熱(re)(re)片(pian)散(san)發到周圍空氣中(zhong)(zhong)(zhong)去。