The **M2PHSW-151-R2** is a specific electronic component typically categorized as a **Micro-Switch** or **Tactile Push Button Switch**, often used in automotive, industrial, and consumer electronics. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. Key Technical Specifications The device is designed for low-power signaling and human-interface applications. | Feature | Specification (Typical) | | :--- | :--- | | **Type** | Push Button Switch (SPST - Single Pole Single Throw) | | **Circuit Configuration** | Normally Open (NO) | | **Contact Rating** | 50mA @ 12V DC (standard for signal switches) | | **Operating Force** | 160gf to 250gf (grams-force) | | **Life Cycle** | ~100,000 to 500,000 cycles | | **Mounting Type** | Surface Mount (SMD) / Through-Hole (THT) depending on suffix | --- ### 2. Physical Construction The "R2" suffix usually refers to the revision or the packaging format (such as Tape & Reel for automated assembly). * **Housing Material:** High-temperature thermoplastic (designed to withstand reflow soldering). * **Contacts:** Usually silver-plated or gold-plated to ensure low contact resistance and prevent oxidation. * **Actuator:** A small plunger (often black or grey) that provides tactile feedback ("click" feel) when pressed. --- ### 3. Electronic Behavior The switch acts as a momentary contact bridge. It does not stay in the "ON" position; it only completes the circuit while pressure is applied. 1. **Contact Resistance:** Typically $< 100 \text{ m}\Omega$. High resistance would indicate wear or contamination. 2. **Insulation Resistance:** $> 100 \text{ M}\Omega$ at 100V DC. 3. **Dielectric Strength:** Capable of withstanding 250V AC for 1 minute without breakdown. 4. **Bounce Time:** Usually $< 10\text{ms}$. In microcontroller applications, "debouncing" via software or a capacitor is required to prevent multiple trigger signals. --- ### 4. Common Applications Due to its compact size and reliability, the M2PHSW-151-R2 is found in: * **Consumer Electronics:** Reset buttons on routers, volume buttons on small gadgets. * **Automotive:** Interior light toggles or dashboard controls. * **Industrial:** PCBA-level user input for configuration. --- ### 5. Schematic Symbol In a PCB design environment (like Altium or KiCad), the component is represented as follows: ```text [ Pin 1 ] ----\ ---- [ Pin 2 ] | (Push to Close) ```