2BU50,断路器 50A MCB B CHAR 480Y/277VAC UL508
2BU50R,断路器 50A B Characteristic UL 1077 2 POLE
2BU5R,断路器 5A B Characteristic UL 1077 2 POLE
2BU6,断路器 6A MCB B CHAR 480Y/277VAC UL508
2BU60,断路器 60A MCB B CHAR 480Y/277VAC UL508
2BU60R,断路器 60A B Characteristic UL 1077 2 POLE
2BU63,断路器 63A MCB B Char 2pl 480Y/277VAC
2BU63R,断路器 480Y/277VAC,UL1077
