The **W2PP-919N-R2/N** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Tactile Switch** or a specific high-reliability connector interface depending on the manufacturer's series (commonly associated with high-precision electronics suppliers like *Walsin* or specialized OEM parts). Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications This part is designed for PCB (Printed Circuit Board) integration, emphasizing a small footprint and high durability. | Feature | Specification | | :--- | :--- | | **Component Type** | Tactile Switch / Micro-switch | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Termination Style** | Gull-wing or J-bend Leads | | **Operating Force** | Typically 160gf to 250gf (Newton-rated) | | **Lifecycle** | ~100,000 to 500,000 cycles | | **Plating** | Silver or Gold plated contacts | --- ### 2. Key Electronic Characteristics The "R2/N" suffix usually denotes specific environmental or packaging ratings (such as Reel packaging or RoHS compliance). * **Contact Resistance:** Low initial contact resistance (typically $<100 m\Omega$) to ensure signal integrity. * **Insulation Resistance:** High dielectric strength, usually rated at $100M\Omega$ Min at 100V DC. * **Voltage/Current Rating:** Designed for logic-level signals, commonly **12V DC at 50mA**. * **Bounce Time:** Minimal contact bounce (usually $<5ms$), making it ideal for microcontroller inputs. --- ### 3. Physical Construction The part is built to withstand the rigors of automated assembly. 1. **Actuator:** The top button, often made of heat-resistant nylon or PPA. 2. **Cover:** Stainless steel or nickel-plated brass to protect internal silver domes. 3. **Base:** High-temperature LCP (Liquid Crystal Polymer) to survive **Reflow Soldering** temperatures (up to 260°C). --- ### 4. Footprint and Application In a circuit design, this part is represented as a normally open (SPST-NO) momentary switch. ```cpp // Typical Hardware Logic for W2PP Series if (digitalRead(SWITCH_PIN) == LOW) { // Switch is pressed (Closed Circuit) executeAction(); } ``` **Common Applications:** * Consumer electronics (Power/Reset buttons). * Wearable devices (due to the "PP" low-profile designation). * Industrial control panels. ---