The **WRPPB-KM5JR-R** is a specific part number belonging to the **WRPPB Series** of tactile push-button switches, typically manufactured by companies like **Walsin** or associated electronic component distributors. These switches are commonly used for PCB (Printed Circuit Board) mounting. --- ### 1. Component Specifications The part number can be broken down into specific technical characteristics. Below are the typical electronic and physical specifications for this component: | Characteristic | Specification | | :--- | :--- | | **Component Type** | Tactile Switch / Push Button | | **Mounting Type** | Through-hole (THT) or SMD (depends on specific series suffix) | | **Actuator Style** | Round Button / Plunger | | **Circuitry** | SPST - NO (Single Pole Single Throw - Normally Open) | | **Contact Rating** | Usually 50mA @ 12V DC | | **Operating Force** | Typically 160gf or 260gf (indicated by "5J") | | **Travel Distance** | 0.25mm ± 0.1mm | | **Operating Life** | ~100,000 to 500,000 cycles | --- ### 2. Breakdown of the Part Number While naming conventions vary slightly by manufacturer, the code generally follows this logic: * **WRPPB**: Series identifier (Waterproof or Standard Push Button series). * **KM**: Mechanical size or frame dimensions (e.g., 6x6mm). * **5J**: Often refers to the **Operating Force** (e.g., 160 grams-force). * **R**: Indicates packaging type, usually **Tape & Reel** or **RoHS Compliant**. --- ### 3. Typical Pin Configuration These switches usually feature a 4-pin layout designed for stability on a PCB. Internally, the pins are connected in pairs. ```text [ Pin 1 ]-------[ Pin 2 ] | | [Switch Mechanism (NO)] | | [ Pin 3 ]-------[ Pin 4 ] ``` * **Pins 1 and 2** are internally shorted. * **Pins 3 and 4** are internally shorted. * The circuit is completed between (1/2) and (3/4) only when the button is pressed. --- ### 4. Applications This component is widely used in consumer electronics due to its small footprint and tactile feedback: * **Consumer Electronics:** Remote controls, microwave panels, and calculators. * **Industrial:** Reset buttons on Motherboards or PLC modules. * **Automotive:** Dashboard controls and key fobs.