The **UB201KW036F-3JB** is a high-quality, low-profile illuminated pushbutton switch manufactured by **NKK Switches**. It belongs to the UB2 family, known for its compact design and reliable tactile feedback. --- ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Circuit** | DPDT (Double Pole Double Throw) | | **Switch Function** | On-Mom (Momentary - springs back after pressing) | | **Current Rating** | 5A @ 125/250V AC; 5A @ 30V DC | | **Illumination** | LED (Green) | | **Cap Style/Color** | Rectangular / Clear lens with White diffuser | | **Mounting Type** | Through Hole (PCB Mount) | | **Termination** | PC Pin | | **Operating Force** | 1.90 Newton (Medium Actuation) | --- ### Key Electronic Components & Features #### 1. DPDT Circuitry As a **Double Pole Double Throw** switch, it controls two separate circuits simultaneously. Each pole can switch between two different output paths, making it versatile for complex signal routing or redundant safety systems. #### 2. Built-in LED (Green) The "6F" in the part number indicates a **Green LED** light source. - **Voltage Requirements:** Usually requires a series resistor if the power supply exceeds the LED's forward voltage (typically ~2.1V to 3.5V depending on current). - **Independence:** The LED circuit is electrically isolated from the switch contacts, allowing it to be controlled independently (e.g., stay lit constantly or flash via an external MCU). #### 3. Silver Contacts The switch uses silver contacts, which are ideal for power-level switching (up to 5A). Silver provides excellent conductivity and durability over time, though it is better suited for power applications rather than "dry circuit" (extremely low voltage) logic signals where gold plating is preferred. #### 4. Snap-Action Mechanism The internal mechanism is designed for a positive, "snappy" tactile feel. This ensures that the electrical connection is made quickly and decisively, reducing the risk of arcing and mechanical wear. --- ### Physical Dimensions * **Low Profile:** The "KW03" series is designed to sit low on the PCB, saving vertical space in control panels. * **Dimensions:** Approximately 17.4mm x 14.4mm (Face) with a total height of roughly 25-28mm depending on the pins.