The S826a quick-acting switch is a fast-acting conversion type. Its technical performance conforms to VDE 0660 and Part 2007/92 (EN 60947, IEC 947). It has the characteristics of small size, light weight, easy installation, quick-acting, self-cleaning, forced disconnection and modularization. The two groups of moving contacts are insulated from each other and can be used at random with different poles. The contacts are self-cleaning with permanent magnet arc extinguishing power. It is especially suitable for switching on small current signals, such as computer signals, and has strong breaking ability, and no polarity requirement for wiring. It is widely used in various products of railway locomotives. Other fast-acting switches are S309, S307g, S007a, S008P5, S008P6, S800a, S804b, S802a, S806a, S404M-L, and 403. P-L, Speed Switch S403M-L, Speed Switch S402-H, Speed Switch S402-L, Speed Switch S402M-L, Speed Switch S404-H, Speed Switch S404-L, Speed Switch 847, S Speed Switch 826a/L, Speed Switch 847, Speed Switch QKW1 TAG：