knife switch thriple pole 1.Single throw 2.3P30AS, 3.Full Iron plated copper&zinc alloy 4. ... .3. Electric current: 20A, 30A, 60A and 100A;4. Double throw, part number includes: 2P20, 2P30, 2P60 and 2P100; 3P20, 3P30 ... kg Stable and reliable Factory , producing&packing Triple pole double throw ceramic knife switch 3P30AS