The **LP4-EE-1-R-B-A-R-Y** is a specific part number for a high-quality, illuminated pushbutton switch, typically manufactured by **E-Switch**. This series is widely used in professional audio, medical, and industrial control equipment due to its reliable tactile feedback and integrated LED options. --- ### Part Number Breakdown Understanding this component requires decoding the manufacturer's nomenclature: | Code Segment | Feature | Description | | :--- | :--- | :--- | | **LP4** | Series | Right angle, through-hole illuminated pushbutton switch. | | **EE** | Function | Latching (Push-on, Push-off) / DPDT circuitry. | | **1** | Actuator Style | Large square button cap (often 12mm x 12mm). | | **R** | Housing Color | Red Housing. | | **B** | Contact Material | Silver-plated contacts (Standard). | | **A** | LED 1 Color | Red LED. | | **R** | LED 2 Color | Red LED (Dual LED configuration). | | **Y** | Cap Color | Yellow Cap. | --- ### Technical Specifications The electrical characteristics of the LP4 series are designed for low-power signal switching: * **Circuitry:** DPDT (Double Pole, Double Throw). * **Contact Rating:** 100mA @ 30VDC. * **Contact Resistance:** 50mΩ max (initial). * **Insulation Resistance:** 100MΩ min @ 500VDC. * **Dielectric Strength:** 500VAC for 1 minute. * **Operating Life:** 50,000 cycles. * **Operating Temperature:** -20°C to +70°C. --- ### Key Internal Components 1. **Contact Mechanism:** Uses a "Snap-action" or "Spring-loaded" mechanism to provide a distinct tactile click when the button is depressed. 2. **Latching Cam:** Because this is an "EE" (Latching) model, it contains a mechanical heart-shaped cam that holds the switch in the "down" position until pressed again. 3. **LED Circuitry:** The LEDs are integrated into the housing but have separate pins from the switch circuit. This allows the LED to be controlled independently (e.g., lighting up only when the device is powered on, or only when the button is pressed). 4. **Terminals:** Right-angle PC board pins, allowing the switch to be mounted perpendicular to the motherboard, ideal for front-panel interfaces. --- ### Typical Applications * **Audio/Visual:** Channel mutes, power toggles, or source selectors on mixing consoles. * **Instrumentation:** Mode selection on oscilloscopes or multimeters. * **Telecommunications:** Control panels for server racks.