通过整流桥引脚这条传热途径的热阻为： 　　比较上述两种传热途径的热阻可知： 整流桥通过壳体表面自然对流冷却进行散热的热阻（ ）是通过引脚进行散热这种散热途径的热阻（ ）的1.5倍。 于是我们可以得出如下结论：在自然冷却的情况下，整流桥的散热主要是通过其引脚线（输出引脚正负极） QCA30AA120 QCA30B60 QCA50AA100 QCA50AA120 QCA50B60 QCA75A60 QCA75AA100 QCA75AA120 QCA75BA60 QCA100A60 QCA100AA100 QCA100AA120 QCA100BA60 QCA150A60 QCA150AA100 QCA150AA120 QCA150BA60 QCA200A60 QCA200AA100 QCA200AA120 QCA200BA60 QCA300BA60 QCB30A60 QCB50A60 QCB75A60 QBB100A60 QBB150A60 QAE75AA60 QF15AA60 QF30AA60 QF20AA60 QF50AA60 MQG100H100 三社整流桥 DF20DB80 DF20BA40 DF20BA80 DF20AA120 电镀开关电源 300A 12V(单台) 500A 12V(单台) 500A 24V(单台) 750A 24V(单台) 1000A 12V(单台) 1000A 15V(单台) 1000A 18V(单台) 1100A 15V(单台) 1250A 12V(单台) 1500A 12V(单台) 750A 12V(两台以上并联) 1000A 12V(两台以上并联) 1000A 15V(两台以上并联) 1000A 18V(两台以上并联) 1100A 15V(两台以上并联) 1250A 12V(两台以上并联) 1500A 12V(两台以上并联) 2000A 12V(两台并联) 2000A 18V(两台并联)