The **UB216SKW035D-3JB** is a high-quality, low-profile illuminated pushbutton switch manufactured by **NKK Switches**. It belongs to the UB2 series, which is known for its space-saving design and reliable tactile feedback. --- ### 1. Part Number Breakdown To understand the electronic and mechanical characteristics, we can decode the part number: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | UB2 | Low Profile Pushbutton Series | | **Circuit** | 16 | DPDT (Double Pole, Double Throw) | | **Action** | SK | Momentary (On) - Returns to position after press | | **Terminal** | W03 | Silver Contacts / PC Terminals (Straight) | | **LED Voltage** | 5D | 2V DC Amber LED (Typical) | | **Cap Type** | 3JB | Clear Lens with White Filter / Rectangular Shape | --- ### 2. Key Technical Specifications Below are the electrical and mechanical limits for this specific component: #### Electrical Characteristics * **Current/Voltage Rating:** 5A @ 125/250V AC; 5A @ 30V DC. * **Contact Resistance:** 50 milliohms maximum. * **Insulation Resistance:** 200 Megohms minimum @ 500V DC. * **Dielectric Strength:** 1,000V AC minimum between contacts for 1 minute. #### LED Specifications (Amber) * **Forward Current ($I_f$):** 20mA. * **Forward Voltage ($V_f$):** 2.0V DC. * **Note:** A current-limiting resistor is required when connecting the LED to a power source higher than 2V. --- ### 3. Physical & Mechanical Features * **Mounting Type:** Through-hole (PCB Mount). * **Actuation Force:** 1.90 Newtons (Medium-light touch). * **Mechanical Life:** 1,000,000 operations minimum. * **Sealability:** This series is typically designed for dust-tight applications but is not fully submersible. --- ### 4. Typical Applications Due to its DPDT configuration (allowing it to control two separate circuits simultaneously) and its compact size, it is commonly used in: * Control panels for industrial machinery. * Professional audio/video broadcasting equipment. * Medical instrumentation. * Test and measurement devices.