Based on the part number **ALPT-223-R**, this component is a **Tactile Switch** (or Push Button Switch) typically manufactured by companies like **DiPtosh** or **Alps-style** clones. It is a surface-mount or through-hole mechanical component used to close an electrical circuit when pressed. Below is the detailed breakdown of its electronic and physical specifications. --- ### 1. General Specifications The "ALPT" series is characterized by its compact footprint and reliable tactile feedback (a "click" sensation). | Feature | Specification (Typical) | | :--- | :--- | | **Switch Type** | Momentary (Normally Open) | | **Mounting Type** | Through-Hole (THT) or SMT | | **Actuation Force** | 160gf to 250gf (Grams-force) | | **Travel Distance** | 0.25mm ± 0.1mm | | **Life Expectancy** | 50,000 to 100,000 Cycles | --- ### 2. Electrical Characteristics These parts are designed for low-power signal switching, not for driving heavy loads. * **Contact Rating:** 50mA @ 12V DC. * **Contact Resistance:** $\leq$ 100m$\Omega$ (Initial). * **Insulation Resistance:** $\geq$ 100M$\Omega$ at 100V DC. * **Dielectric Strength:** 250V AC for 1 minute. * **Bounce Time:** $\leq$ 10ms (The time it takes for the signal to stabilize after pressing). --- ### 3. Physical & Material Composition The "R" suffix often denotes **RoHS Compliance** (Lead-free) or specific packaging (like **Reel** for automated assembly). | Component Part | Material | | :--- | :--- | | **Cover** | Stainless Steel / Tin plated | | **Base** | High-temperature Nylon/LCP (Liquid Crystal Polymer) | | **Stem (Actuator)** | PPA/Nylon (often Black or Red) | | **Contact Dome** | Stainless Steel with Silver plating | | **Terminal** | Brass with Silver plating | --- ### 4. Application Logic The ALPT-223-R is a **SPST (Single Pole Single Throw)** switch. When the button is pressed, the internal metal dome collapses, connecting two internal traces. **Wiring Example:** ```cpp // Typical Arduino Pin Setup const int buttonPin = 2; void setup() { // Use internal pull-up to prevent floating signal pinMode(buttonPin, INPUT_PULLUP); } void loop() { int buttonState = digitalRead(buttonPin); if (buttonState == LOW) { // Switch is pressed (Closed Circuit) } } ``` --- ### 5. Common Use Cases * **Consumer Electronics:** Remote controls, microwave panels, and calculators. * **Industrial:** Reset buttons on PCB motherboards. * **Automotive:** Dashboard controls and key fobs.