The **P13-R** (often associated with the **P13-R Series** by manufacturers like *C&K* or *Littelfuse*) is a specific type of **Pushbutton Switch**. These components are widely used in industrial control panels, medical devices, and high-reliability consumer electronics. --- ### 1. Key Technical Specifications The P13-R series is defined by its mechanical robustness and specific electrical ratings. Below are the general specifications for this part: | Feature | Specification (Typical) | | :--- | :--- | | **Switch Type** | Momentary Pushbutton | | **Contact Form** | SPST (Single Pole Single Throw) | | **Current Rating** | 0.1A to 5A (Depending on contact material) | | **Voltage Rating** | 30V DC to 250V AC | | **Contact Resistance** | < 50 mΩ | | **Operating Life** | 500,000 to 1,000,000 cycles | | **Termination** | Solder Lug or PC Pin | --- ### 2. Physical Construction The P13-R is engineered for durability. Its internal components usually include: * **Actuator:** The physical button pressed by the user. Usually available in multiple colors (Red, Black, Green). * **Housing:** High-temperature thermoplastic (often UL 94V-0 rated). * **Contacts:** * *Silver Plated:* High power switching. * *Gold Plated:* Low power/dry circuit applications (prevents oxidation). * **Return Spring:** Provides the tactile "click" and returns the button to its original position. --- ### 3. Usage and Circuit Application The P13-R is a "Normally Open" (NO) switch. When the button is pressed, the circuit is completed; when released, the circuit breaks. #### Example Wiring (LED Trigger) ```cpp // Logic for a microcontroller using a P13-R switch void setup() { pinMode(2, INPUT_PULLUP); // P13-R connected to Pin 2 and Ground pinMode(13, OUTPUT); // Built-in LED } void loop() { int sensorVal = digitalRead(2); if (sensorVal == LOW) { // Button is pressed digitalWrite(13, HIGH); } else { digitalWrite(13, LOW); } } ``` --- ### 4. Common Variants * **P13-R (Standard):** Standard red actuator, momentary action. * **P13-R Sealed:** Includes an O-ring or rubber boot for IP67 water/dust protection. * **P13-R Snap-in:** Designed for quick panel mounting without the need for additional hardware.