The special micro switch of railway electrical appliance part, supply microswitch / speed switch QKW1.S826a speed switch for speed conversion type, the technical performance conforms to VDE 0660, Part 200 7/92 (EN 60947, IEC 947), with small volume, light weight, easy installation, quick movement, self purification, forced disconnection, modularization and so on, two groups of movable contacts are mutually exclusive. It can be used differently at random, and the connection is self purification with permanent magnetic arc extinguishing function. It is especially suitable for connecting small current signals, such as transmitting computer signals, and having strong breaking ability at the same time, and there is no requirement for polarity when the wiring is connected. The speed switch has wide application range and is now widely used in all kinds of railway locomotives. Other 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, switchgears, switch occasions, switch occasions, switch occasions, switches 04-H, switch S404-L, switch S847, switch S826a/L, railway electric locomotive special contact element.TKY1-20/110V,

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