The **YB2-25CWCKG4** is a high-quality, professional-grade pushbutton switch manufactured by **NKK Switches**. It belongs to the YB2 Series, which is known for its tamper-resistant design and space-saving square/round bodies. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | NKK Switches | | **Circuit Type** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON-MOM (Momentary - springs back after press) | | **Current Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Contact Material** | Gold Plated | | **Actuator Type** | Square, Flush Mount | | **Termination Style** | PC Pin (Through-hole) | | **Panel Cutout** | Round - 16.00mm Diameter | | **Ingress Protection** | IP65 (Dust tight, Water resistant) | --- ### 2. Breakdown of the Part Number The part number identifies specific configurations for the switch: * **YB2**: Series identifier (Panel seal, sub-miniature). * **25**: Circuit code for **DPDT**. * **CW**: Indicates the switch is **Splashproof** (meets IP65 standards). * **CK**: Indicates the Housing/Bezel style (Black). * **G**: Contact material is **Gold** (intended for low-energy logic level circuits). * **4**: Specific cap or illumination code (typically related to color or type). --- ### 3. Key Electronic Characteristics #### Logic Level Switching Because this part uses **Gold contacts**, it is specifically designed for **logic level applications** (0.4VA maximum). * **Advantage:** Gold prevents oxidation, ensuring a reliable connection for very low voltages. * **Restriction:** Do not use this switch for high-power applications (like 120V AC motors), as the gold plating will burn off. #### DPDT Circuitry The **Double Pole Double Throw** configuration means the switch controls two separate circuits simultaneously. Each "pole" has a common pin that toggles between two output pins. #### Momentary Action The "MOM" function means the electrical connection is only made while your finger is physically pressing the button. Once released, it returns to its original state. --- ### 4. Typical Applications * Control panels in harsh environments (due to IP65 rating). * Medical instrumentation. * Communication equipment. * Industrial automation interfaces where logic-level signals are sent to a PLC or Microcontroller.