The **YB225CWCKG01-5F-JS** is a high-quality, professional-grade illuminated pushbutton switch manufactured by **NKK Switches**. It belongs to the YB2 series, known for its "tamper-resistant" flush mount design and robust tactile feedback. --- ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | NKK Switches | | **Circuit Type** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON-ON (Latching / Maintained) | | **Current Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Illumination** | LED (Green) | | **Cap Style** | Square, Clear Lens with White Filter | | **Mounting Type** | Panel Mount, Front (Flush) | | **Termination Style** | Solder Lug | | **Ingress Protection** | IP65 (Dust tight, water-resistant) | --- ### 2. Part Number Breakdown To understand the electronic capabilities, we can deconstruct the SKU: * **YB2**: Series identifier (22mm panel cutout). * **25**: Circuit configuration (DPDT). * **CW**: Housing style (Circular/Flush mount, water-shielded). * **CK**: Contact material (Gold contacts, ideal for logic-level signals). * **G**: Contact rating (Low level / 0.4VA). * **01**: Termination (Solder Lug). * **5F**: Illumination (5 = Green LED, F = 2.1V forward voltage). * **JS**: Cap/Diffuser color (Silver/Clear combination). --- ### 3. Key Electronic Components #### A. Contact Mechanism (DPDT) The **Double Pole Double Throw** configuration allows the switch to control two separate circuits simultaneously. Because it is an **ON-ON** (Latching) switch, it stays in the depressed position after being pushed and requires a second push to return to its original state. #### B. Gold Contacts (Logic Level) Unlike silver contacts designed for high-power arcing, these **Gold-plated** contacts are engineered for "Logic Level" applications. They ensure high reliability in low-voltage/low-current scenarios (under 28V) by preventing oxidation on the contact surface. #### C. Integrated LED The "5F" code indicates an integrated **Green LED**. * **Polarity:** The terminals are marked (+) and (-) for DC power. * **Protection:** Users must typically provide a current-limiting resistor to prevent the LED from burning out, as the forward voltage is approximately 2.1V. #### D. Environmental Sealing The unit features an internal o-ring and a silicone rubber seal, giving it an **IP65 rating**. This makes it suitable for industrial control panels where exposure to moisture or dust is expected. --- ### 4. Wiring Diagram (Simplified) ```text [ Switch Terminals ] [ LED Terminals ] 1 4 (NC) (+) (Anode) 2 5 (COM) (-) (Cathode) 3 6 (NO) ```