The **LP4-OA-1-R-B-A-G-R** is a specific part number for a high-quality, precision-engineered **Illuminated Pushbutton Switch** manufactured by **OTTO Controls**. This series is known for its ruggedness and is frequently used in aerospace, industrial, and heavy equipment applications. Below is a detailed breakdown of the electronic and mechanical specifications based on the part number nomenclature. --- ## 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Switch Type** | Sealed Pushbutton | | **Contact Form** | SPDT (Single Pole Double Throw) | | **Mechanical Life** | 250,000 cycles | | **Circuitry** | Momentary (Off-On) | | **Mounting** | 5/8" Threaded Bushing | | **Sealing** | IP68S (Submersible) or Watertight | | **Termination** | Solder Terminals | --- ## 2. Part Number Breakdown The OTTO LP4 series uses a coded system to define the exact electronic behavior and aesthetics: ### **LP4 - Series Selection** * **LP4:** Precision Miniature Illuminated Pushbutton. This series offers a short behind-panel depth, making it ideal for compact control panels. ### **OA - Action & Circuitry** * **O:** Momentary action (it only stays "on" while pressed). * **A:** SPDT (Single Pole Double Throw) Two-Step. This defines how the internal electrical contacts move between states. ### **1 - Enclosure Rating** * **1:** Indicates the sealing level. Usually corresponds to a watertight seal to **IP68S** standards, protecting the electronic components from dust and water immersion. ### **R - Bezel Style** * **R:** Raised Bezel. This protects the button from accidental actuation and provides a specific tactile feel. ### **B - LED Voltage/Circuit** * **B:** Defines the electrical requirements for the internal illumination. This typically indicates a specific voltage (e.g., **12V DC**) and a specific resistor configuration for the LED. ### **A - Light Source (Color 1)** * **A:** Determines the primary LED color (often **Amber** or **Red** depending on the specific catalog version). ### **G - Button Color** * **G:** Indicates the physical color of the lens/button cap (e.g., **Green**). ### **R - Legend/Marking** * **R:** Refers to the specific text or symbol printed on the button face, or the orientation of the marking. --- ## 3. Electronic Characteristics * **Load Handling:** Capable of handling logic-level signals up to approximately 5 Amps (depending on voltage). * **Contact Resistance:** Extremely low (typically < 25 milliohms), ensuring high signal integrity. * **Illumination:** Features an integrated LED that is independent of the switch circuit, allowing for status feedback (e.g., the light stays on even when the button is not pressed, or vice-versa). * **Case Material:** Thermoplastic, designed to withstand high impact and extreme temperatures.