The **LB26RGW01** is a high-quality, illuminated push-button switch manufactured by **NKK Switches**. It belongs to the LB Series and is specifically designed for panel-mount applications requiring reliable tactile feedback and visual indication. ### 1. Key Technical Specifications The following table outlines the core electronic and mechanical parameters of the device: | Parameter | Specification | | :--- | :--- | | **Circuit Type** | DPDT (Double Pole Double Throw) | | **Switch Function** | Momentary (On) | | **Current/Voltage Rating** | 3A @ 125V AC or 250V AC | | **Contact Resistance** | 50 mΩ maximum | | **Mechanical Life** | 1,000,000 operations minimum | | **Electrical Life** | 100,000 operations minimum | | **Illumination** | Supports LED, Neon, or Incandescent lamps | | **Termination Style** | Solder Lug / Quick Connect | --- ### 2. Functional Components #### A. Contact Mechanism (DPDT) The "DPDT" configuration means this switch can control two separate circuits simultaneously. Each circuit can toggle between two paths. Because it is **Momentary**, the switch only stays in the "active" position while your finger is pressing it; it springs back to the original position once released. #### B. Housing and Mounting * **Body Style:** Rectangular (indicated by the "R" in the part number). * **Mounting Type:** Snap-in mounting, making it easy to install into pre-cut rectangular holes in control panels. * **Bezel:** Usually integrated to provide a flush or slightly raised finish on the panel. #### C. Illumination System The "W01" suffix typically refers to the silver contacts and the specific internal wiring for the lamp. * **Lamp Socket:** It features a removable cap and lamp socket, allowing the user to select the color and type of light (LED vs. Incandescent) depending on the voltage requirements of the project. * **Diffuser:** Often includes a built-in diffuser to ensure the light is spread evenly across the rectangular face of the button. --- ### 3. Connection Pinout Diagram While looking at the bottom of the switch, the terminals are generally arranged as follows: ```text [ Lamp Terminal 1 ] [ Lamp Terminal 2 ] (Pole 1) (Pole 2) [ NC1 ] [ NC2 ] <-- Normally Closed [ COM1 ] [ COM2 ] <-- Common [ NO1 ] [ NO2 ] <-- Normally Open ``` --- ### 4. Common Applications * **Industrial Control Panels:** For triggering machine cycles or emergency stops. * **Broadcast Equipment:** Used in switchers and audio consoles due to the tactile click and clear lighting. * **Medical Instrumentation:** Where high reliability and DPDT safety redundancy are required.