The part number **LP4-OA-1-R-B-B-R-B** refers to a high-quality, illuminated pushbutton switch, typically manufactured by companies like **OTTO Engineering** (specifically within the LP4 series). Below is the detailed breakdown of its electronic and physical components based on the standard OTTO nomenclature. --- ### 1. Component Specifications Table | Feature | Specification/Detail | | :--- | :--- | | **Series** | LP4 (Full size, square, momentary action) | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Action** | Momentary (Spring return) | | **Illumination** | LED (Red/Blue options available depending on wiring) | | **Termination** | Solder terminals | | **Mounting** | Panel Mount (Snap-in or Threaded options) | --- ### 2. Detailed Part Number Breakdown Each character in the sequence defines a specific electronic or aesthetic attribute: | Code | Segment | Description | | :--- | :--- | :--- | | **LP4** | Series | Low profile/Full size square pushbutton. | | **OA** | Circuitry | Form C (SPDT - Single Pole, Double Throw). | | **1** | Mechanical | Standard travel / Momentary action. | | **R** | Bezel Style | Red Bezel (Material: Plastic or Aluminum). | | **B** | Button Color | Blue Button Cap. | | **B** | Illumination Type | Standard LED. | | **R** | LED 1 Color | Red LED. | | **B** | LED 2 Color | Blue LED. | --- ### 3. Electrical Characteristics The LP4 series is designed for rugged environments, often found in industrial controls or aerospace panels. * **Current Rating:** Typically 5 Amps @ 28 VDC or 115 VAC. * **Contact Resistance:** 25 mΩ max (initial). * **Dielectric Strength:** 1,050 Vrms between terminals. * **LED Forward Voltage:** Usually 2.0V to 3.5V depending on the color (requires external resistor if not specified with internal resistance). --- ### 4. Physical Construction * **Case Material:** Thermoplastic. * **Seal:** Often sealed to IP68S (Submersible) or IP64 (Dust-tight/Splash-proof) depending on the specific sub-variant. * **Operating Force:** Approximately 2.5 lbs to 5.0 lbs. ---