The **LP4-OA-1-R-G-B-R-B** is a specific part number for a multi-color LED illuminated pushbutton switch, likely from the **LP4 Series** manufactured by companies like **E-Switch**. This component is widely used in control panels, audio/video equipment, and instrumentation where visual feedback is required. --- ### 1. Part Number Breakdown The alphanumeric code identifies the physical and electrical characteristics of the switch: | Segment | Meaning | Description | | :--- | :--- | :--- | | **LP4** | Series | Low-profile, momentary pushbutton switch | | **OA** | Circuitry | **Open/Active**: Single Pole Double Throw (SPDT) | | **1** | Housing Style | Standard square/rectangular bezel mount | | **R-G-B** | LED Colors | Red, Green, and Blue (Full RGB capability) | | **R-B** | Cap/Button | Transparent/Clear cap with specific color inserts or base | --- ### 2. Technical Specifications Below are the typical electrical and mechanical ratings for this component series: * **Contact Rating:** 100mA @ 30VDC * **Electrical Life:** 50,000 cycles (minimum) * **Contact Resistance:** 50mΩ Max (initial) * **Insulation Resistance:** 100MΩ Min @ 500VDC * **Operating Force:** 150 ± 50 grams * **Travel:** 1.5mm ± 0.3mm * **Operating Temperature:** -20°C to +70°C --- ### 3. Electronic Architecture The switch functions as a combination of two distinct circuits: #### A. The Switching Circuit (SPDT) The "OA" designation signifies a **Momentary** action. * **NC (Normally Closed):** Terminal connected when the button is at rest. * **NO (Normally Open):** Terminal connected only when the button is pressed. * **Common:** The input terminal shared between NC and NO. #### B. The LED Circuit (RGB) The switch contains four pins dedicated to illumination (Common Anode or Cathode, plus R, G, and B leads). * By applying voltage to different pins, you can create various colors (e.g., Red + Blue = Purple). * **Note:** External resistors are required to limit current to the LEDs to prevent burnout (typically ~20mA per channel). --- ### 4. Typical Applications * **Pro-Audio Gear:** Mute/Solo buttons on mixing consoles. * **Broadcast Equipment:** Video switchers (Tally lights). * **Industrial Controls:** State indicators (Red = Error, Green = Ready, Blue = Maintenance). * **Medical Devices:** Mode selection buttons.