Special micro-switch for railway electrical appliances, QKW1.S826a quick-acting switch for supply micro-switch/quick-acting switch is quick-acting conversion type. Its technical performance conforms to VDE 0660, Part 2007/92 (EN 60947, IEC 947), which has the characteristics of small size, light weight, easy installation, quick-acting, self-cleaning, forced disconnection and modularization. The two groups of dynamic contacts are isolated from each other. The edge can be used at random with different poles. The contact is self-cleaning with permanent magnet arc extinguishing function. It is especially suitable for switching on small current signals, such as computer signals, and has strong breaking ability, and no requirement for polarity when wiring. The switch is widely used in various products of railway locomotives. Other switches include switch S309, switch S307g, switch S007a, switch S008P5, switch S008P6, switch S800a, switch S804b, switch S802a, switch S806a, switch S404M-L, switch S403P-L, switch S403M-L, switch S402-H, switch S402-L, switch S402M-L, switch S402M-L, switch S402M-L. 04-H, switch S404-L, switch S847, switch S826a/L, railway electric locomotive special contact element.TKY1-20/110V, TAG：