Based on technical specifications, the **PS117E-1** is typically identified as a **tactile push-button switch**. These components are widely used in consumer electronics, automotive interfaces, and control panels due to their compact size and reliability. ### 1. Key Technical Specifications The following table outlines the general electrical and mechanical characteristics of the PS117E-1 series: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Momentary Tactile Switch | | **Contact Configuration** | Single Pole Single Throw (SPST) | | **Rated Voltage/Current** | 12V DC / 50mA | | **Contact Resistance** | ≤ 100mΩ | | **Insulation Resistance** | ≥ 100MΩ (100V DC) | | **Operating Force** | 160gf to 250gf (typical) | | **Life Cycle** | 100,000+ operations | --- ### 2. Internal Electronic Structure The PS117E-1 operates on a simple mechanical-to-electrical principle: 1. **The Dome:** Inside the plastic housing is a metallic "snap" dome. This dome acts as the moving contact and provides the tactile "click" feedback. 2. **Terminal Layout:** It usually features 2 or 4 pins. In a 4-pin configuration, the pins are often connected in pairs internally to provide structural stability on the PCB. 3. **Circuit Path:** When the button is pressed, the metallic dome deforms and bridges the gap between the input and output terminals, closing the circuit. --- ### 3. Usage and PCB Mounting The "E-1" suffix often denotes specific mounting styles or button heights. * **Mounting Type:** Generally **Through-Hole (THT)**, meaning the pins pass through the PCB and are soldered on the opposite side. * **Dimensions:** It is a small-footprint part, often roughly 6x6mm or similar, making it ideal for dense circuit boards. * **Applications:** * Reset buttons on microcontrollers (Arduino/ESP32). * Interface buttons on home appliances (Microwaves, Washing Machines). * Operating keys on remote controls. --- ### 4. Circuit Diagram Representation In a schematic, the PS117E-1 is represented as a normally open (NO) switch: ```text [ Terminal 1 ] ----\ ---- [ Terminal 2 ] | (Push Button) ```