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Waterproof Micro Switches

1. Working Principle of waterproof micro switch

The external mechanical force acts on the action reed through transmission elements (press pins, buttons, levers, rollers, etc.), and when the action reed is displaced to the critical point, an instantaneous action occurs, so that the moving contact at the end of the action reed and the fixed contact point to switch on or off quickly.

When the force on the transmission element is removed, the action reed generates a reverse action force, and when the reverse stroke of the transmission element reaches the action critical point of the reed, the reverse action is completed instantaneously. The contact distance of the micro switch is small, the action stroke is short, the pressing power is small, and the on-off is fast. The action speed of the moving contact has nothing to do with the action speed of the transmission element.

2. Waterproof Micro Switch Wiring Method

When it comes to the wiring method of the micro switch, it is actually very simple. Generally, the micro switch has three points. One of these three points is the common point, the other is the normally open point, and the other is the closed point. The common point is like the one in the socket. The zero line, the normally open point is the point where the switch is opened so that the current flows and the closing point is of course the contact that disconnects the current. Connect the corresponding point to the corresponding location, and you're done. Although the method of wiring the micro switch looks very simple, it is still necessary to make relevant preparations.

3. Application of Waterproof Micro Switch

The micro switch is small in size, but has a great effect, and can be seen everywhere in our lives. Such as computer mice, household appliances, automotive electronic products, communication equipment, military products, testing equipment, gas water heaters, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, floating ball equipment, medical equipment, building automation, electric Tools and general electrical and radio equipment, 24-hour timers, etc.

4. Important Parameters of Waterproof Micro Switch

a) Anti-leakage index

It is the maximum withstand voltage value at which a predetermined solution (0.1 [%] of ammonium chloride) is dropped between the electrodes by inserting two electrodes into the test sample without short-circuiting, and there are five grades as follows. The relationship between the CTI value and PTI of the ul yellow book is shown in the following table.

b) Number of operations

Indicates the number of switches for the endurance test specified in the specification. Each manufacturer selects from the number of times in the table below, which is indicated by a symbol on the switch. In the IEC specification, the switching standard for high-frequency operation is 50,000 times, and the switching standard for low-frequency operation is 10,000 times.

c) Use ambient temperature

The temperature range in which the switch can be used. Refer to the table below for the meaning of the symbols. 

Representation symbol t85 25t85.

Temperature 0~+85℃ -25~+85℃.

RM1311, Renfeng Building, No. 490, Tianhe Road, Tianhe District, Guangzhou, Guangdong, China, 510630.
RM1311, Renfeng Building, No. 490, Tianhe Road, Tianhe District, Guangzhou, Guangdong, China, 510630.