FTB series terminal blocks can work under 150°C temperature ALL TIME. The surroundings temperature -40°C---200°C. Rated Voltage: 600V ITEM NO. RATINGS FTB-10 10A 2-12P FTB-20 20A 2-12P FTB-30 30A 2-12P FTB-60 60A 2-12P FTB-100 100A 2-12P FTB-200 200A 2-12P Units can be assembled freely as you like!!!