The **WJPAD2-4B1-R** is a specific electronic component typically identified as a **tactile switch** (or tact switch) used in various consumer electronics and industrial control panels. These are momentary push-button switches that provide physical feedback to the user. --- ### 1. General Specifications While specific datasheets can vary by manufacturer (often associated with brands like *Well Buying* or similar specialized switch producers), the part number breakdown generally follows this logic: | Feature | Description | | :--- | :--- | | **Component Type** | Tactile Switch | | **Circuitry** | SPST (Single Pole Single Throw) | | **Switch Function** | Momentary (Normally Open) | | **Mounting Type** | Through-hole (typically) | | **Termination** | Solder Pins | --- ### 2. Physical Characteristics The "4B1" and "R" suffixes in the part number usually denote specific mechanical dimensions and actuation forces: * **Actuator Height:** The height of the plunger (the part you press) is a critical factor for fitting into plastic enclosures. * **Operating Force:** Measured in Gram-force (gf) or Newtons (N). Common values are 160gf or 250gf. * **Color/Material:** The "R" may signify a specific color for the button/stem (often Red) or RoHS compliance. * **Dimensions:** Usually follows a standard footprint (e.g., 6x6mm or 12x12mm base). --- ### 3. Electrical Ratings These parts are designed for low-power signal switching rather than high-current power delivery. | Parameter | Typical Value | | :--- | :--- | | **Current Rating** | 50mA | | **Voltage Rating** | 12V DC | | **Contact Resistance** | < 100mΩ | | **Insulation Resistance** | > 100MΩ | | **Dielectric Strength** | 250V AC for 1 minute | | **Operating Life** | 100,000 to 1,000,000 cycles | --- ### 4. Common Applications * **Household Appliances:** Microwave control panels, washing machine buttons. * **Computer Peripherals:** Reset buttons, power buttons on monitors. * **Industrial Equipment:** Interface panels for PLC units or controllers. * **Consumer Gadgets:** Remote controls and handheld devices.