The **M2PHSW-1C-R2** is a specific type of mechanical microswitch, often referred to as a "Snap Action Switch." It is widely used in industrial controls, automotive applications, and consumer electronics to detect position or provide user input. ### 1. Key Technical Specifications The following table outlines the typical electrical and mechanical parameters for this component class: | Parameter | Specification | | :--- | :--- | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Switch Function** | On-Mom (Momentary) | | **Current Rating** | Typically 5A to 10A (Depending on voltage) | | **Voltage Rating (AC)** | 125V / 250V AC | | **Actuator Type** | Pin Plunger or Lever (Model dependent) | | **Termination Style** | Solder Lug or Quick Connect | | **Operating Force** | 100g - 150g (Approximate) | --- ### 2. Internal Electronic Structure The "1C" designation usually refers to the contact form. As an **SPDT** switch, it contains three primary terminals: 1. **COM (Common):** The terminal where the input current enters. 2. **NC (Normally Closed):** Connected to COM when the switch is at rest. 3. **NO (Normally Open):** Connected to COM only when the actuator is pressed. --- ### 3. Physical Construction The device is comprised of several high-precision electronic and mechanical parts: * **Contacts:** Usually made of silver alloy to ensure high conductivity and resistance to oxidation/arcing. * **Snap-Action Spring:** A beryllium copper or stainless steel leaf spring that ensures "snap" movement. This prevents "teasing" the contacts, reducing electrical arc damage. * **Housing:** High-temp thermoplastic (PBT or Phenolic) to provide electrical insulation and flame retardancy. * **Actuator:** The physical interface (button or lever) that transfers external force to the internal spring mechanism. --- ### 4. Implementation Example In a basic circuit, you can use the M2PHSW-1C-R2 to toggle between two states, such as a "Ready" light and a "Running" light. ```cpp // Logic representation for a microcontroller (Arduino/ESP32) const int switchPin = 2; // Connected to NO terminal void setup() { pinMode(switchPin, INPUT_PULLUP); Serial.begin(9600); } void loop() { int state = digitalRead(switchPin); if (state == LOW) { Serial.println("Switch Pressed: Circuit Closed"); } } ``` ---