## M2PP-91N-R: Electronic Components & Specifications The **M2PP-91N-R** is a specific type of **Miniature Pushbutton Switch**, typically associated with industrial control panels, automation equipment, and consumer electronics. Below is a breakdown of its electronic characteristics and construction. --- ### 1. General Specifications This switch is designed for high reliability in small spaces. It is a **Panel Mount** component, meaning it is intended to be secured through a hole in a chassis. | Feature | Specification | | :--- | :--- | | **Switch Type** | Pushbutton | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Switch Function** | Momentary (Non-locking) | | **Contact Rating** | 5A @ 125VAC / 3A @ 250VAC | | **Contact Resistance** | 20 mΩ Max (Initial) | | **Insulation Resistance** | 100 MΩ Min @ 500VDC | | **Dielectric Strength** | 1,000 VAC for 1 minute | --- ### 2. Key Electronic Parts The internal and external electronic parts work together to ensure electrical continuity and mechanical durability: * **Contacts (Silver Plated):** The internal contact points are typically made of silver or silver-clad copper to ensure low resistance and prevent oxidation. * **Terminals:** Usually features **Solder Lug** or **PC Pin** terminals. These are the physical interface points where wires or PCB traces connect to the switch. * **Actuator (Plunger):** The moving part that the user presses. In the "91N" series, this is often a round or rectangular button that triggers the internal spring mechanism. * **Internal Spring Mechanism:** A high-tension coil or leaf spring that ensures the "Momentary" action—returning the button to its original position immediately after release. * **Housing/Body:** Made of high-grade PPS (Polyphenylene Sulfide) or Phenolic resin to provide high heat resistance during soldering and electrical insulation. --- ### 3. Connection Logic (SPDT) The "R" in the suffix often denotes the specific terminal orientation or a specific color (Red). As an **SPDT** switch, it has three pins: 1. **Common (C):** The input power/signal. 2. **Normally Open (NO):** Circuit is broken until the button is pressed. 3. **Normally Closed (NC):** Circuit is complete until the button is pressed. --- ### 4. Implementation Example In a basic circuit, the M2PP-91N-R is used as a trigger for a microcontroller (like an Arduino) or a direct relay controller. ```cpp // Example: Using the switch to trigger an LED int switchPin = 2; // Connected to NO terminal int ledPin = 13; void setup() { pinMode(switchPin, INPUT_PULLUP); pinMode(ledPin, OUTPUT); } void loop() { if (digitalRead(switchPin) == LOW) { // Button Pressed digitalWrite(ledPin, HIGH); } else { digitalWrite(ledPin, LOW); } } ``` ---