Product Introduction:

V-153-1C25 3 Pins Snap Action Micro Switch

V15 series micro switch is a kind of switch with micro contact spacing and quick action mechanism, which uses specified stroke and specified force for switching action. Roller Microswitch is covered by shell and has driving rod outside, because the contact spacing of the switch is relatively small.

###The working principle of Micro Switch**

Micro switch is a type of sensitive switch with fast action, usually triggered by mechanical external force. It has the characteristics of small stroke, high precision, and fast on/off, and is widely used in home appliances, industrial equipment, automotive electronics, and other fields.

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## **1. Basic structure**
Micro switches are mainly composed of the following core components:
-Contact system (normally open NO/normally closed NC/common terminal COM)
-* * Spring leaf (spring plate) * * - Provides rebound force
-* * Button (pressure bar/swing bar) * * - receives external mechanical force
-* * Shell * * - protects internal structure
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## **2. Working principle**
The triggering of micro switches depends on the action of mechanical force, and its working process is as follows:

1. * * Initial state**
-When not under force:
-The normally closed (NC) contact is closed, and the common terminal (COM) is conductive with the NC.
-The normally open (NO) contact is disconnected, and no current passes through.

2. * * External force action**
-When the button (pressure bar/swing bar) is subjected to a mechanical force of * * small displacement (usually 0.1~3mm) * *, the spring undergoes deformation.
-When reaching the critical point (action point), the spring quickly bounces, causing the contact state to switch.

3. * * Contact switching**
-Normally closed (NC) is open, normally open (NO) is closed, and the circuit state changes.
-After the external force disappears, the spring plate automatically resets and the contact returns to its initial state.
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## **3. Key characteristics**
|Characteristics | Description|
|------|------|
|* * Small stroke (short travel) * * | Small triggering displacement (usually 0.1-3mm), suitable for precision control|
|* * Quick action (quick action mechanism) * * | Spring leaf bounce switching reduces arcing and extends lifespan|
|* * High mechanical lifespan * * | Up to * * 1 million to 10 million cycles * * (high-quality model)|
|* * High current carrying capacity * * | Some models can support * * 10A+* * (such as industrial grade micro switches)|
|* * Multiple triggering methods * * | Straight rod, roller, swing rod, etc., suitable for different applications|
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## **4. Typical applications**
-* * Home appliances * *: Washing machine door switch, microwave oven door detection
-Industrial equipment: limit switches, safety door locks
-Automotive Electronics: Brake Pedal Switch, Power Window Control
-* * Security System * *: Door Magnetic Alarm, Safe Switch
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## **5. Common faults and troubleshooting**
|Fault phenomenon | Possible cause | Solution|
|----------|----------|----------|
|* * The switch does not operate * * | Mechanical jamming, contact oxidation | Clean the contact or replace the switch|
|Poor contact * * | Contact erosion, spring fatigue | Replace high specification switches (such as gold-plated contacts)|
|* * Mistriggering * * | Excessive external vibration, improper travel setting | Add anti shake design or adjust trigger position|