The **YB216CWCKW01** is a high-quality, panel-mount illuminated pushbutton switch manufactured by **NKK Switches**. It belongs to the YB series, specifically designed for applications requiring a "power" feel with a tactile response and robust environmental protection. --- ## 1. Technical Specifications Below is a breakdown of the core electrical and mechanical characteristics: | Feature | Specification | | :--- | :--- | | **Switch Type** | Pushbutton (Illuminated) | | **Circuitry** | DPDT (Double Pole Double Throw) | | **Switch Function** | On-On (Alternate Action / Latching) | | **Current Rating** | 3A @ 125V AC / 3A @ 250V AC | | **Voltage Rating** | 30V DC @ 3A | | **Illumination** | LED (White) | | **Ingress Protection** | IP65 (Dust tight, water jet protected) | | **Mounting Type** | Panel Mount, Threaded (16mm) | --- ## 2. Component Breakdown The part number **YB216CWCKW01** can be decoded to understand its specific electronic parts: ### A. Contact Mechanism (DPDT) * **DPDT (Double Pole Double Throw):** This means the switch controls two separate circuits simultaneously. Each circuit has one input and two possible output paths. * **Silver Contacts:** The "W01" suffix indicates silver contacts, which are ideal for power-level switching (up to 3A) rather than logic-level (gold) switching. ### B. Illumination (White LED) * The switch features a built-in LED. * **Note:** LEDs are polarity sensitive. You must ensure the anode (+) and cathode (-) are wired correctly to prevent damage. * Depending on your supply voltage, an external current-limiting resistor may be required if the specific sub-model does not have one integrated. ### C. Mechanical Housing * **CW (Cylindrical White):** Refers to the shape and color coding of the actuator/bezel interface. * **C (Splashproof):** Indicates the inclusion of an internal o-ring and external rubber washer to achieve the **IP65** rating, making it suitable for environments exposed to moisture. --- ## 3. Terminal Layout The terminals on the back of the switch are typically arranged as follows: 1. **Switch Terminals:** 6 pins (3 for each pole: Common, Normally Open, Normally Closed). 2. **Lamp Terminals:** 2 pins specifically for the LED power supply. ```text Terminal Configuration Example: [+] LED [-] <-- LED Terminals (1) (4) <-- Common (NC/NO pins below) (2) (5) (3) (6) ``` ---