The **LP4-OA-1-R-B-C-R-N** is a specific part number for a high-quality, illuminated push-button switch manufactured by **OTTO Engineering**. This series is known for its ruggedness and suitability for demanding industrial or commercial panels. --- ## Technical Specifications Breakdown The part number is alphanumeric, where each character represents a specific electronic or physical characteristic of the switch. ### 1. Part Number Decoder | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | `LP4` | Square Housing, Lighted Pushbutton | | **Circuit** | `OA` | SPST (Single Pole Single Throw) - Normally Open | | **Mechanical Action** | `1` | Momentary Action (Press to turn on, release to turn off) | | **Bezel Style** | `R` | Raised Bezel (Protects the button from accidental activation) | | **Illumination** | `B` | Single LED Illumination | | **Lens Color** | `C` | Clear Lens | | **LED Color** | `R` | Red LED | | **Terminal Type** | `N` | PC Pin Terminals (For PCB mounting) | --- ## Electronic & Physical Characteristics ### Electrical Ratings * **Current Rating:** Typically rated for **5 Amps** at 28 VDC or 115 VAC. * **Contact Resistance:** Low initial resistance, usually around 25 mΩ max. * **Dielectric Strength:** Capable of withstanding 1000 Vrms. ### The LED Component The `R` in the part number indicates a **Red LED**. Because LEDs are current-sensitive devices: * **Voltage Drops:** Standard red LEDs usually operate around 2.0V to 2.2V. * **Resistor Requirement:** Depending on your supply voltage (e.g., 12V or 24V), an external current-limiting resistor is often required unless specified otherwise by the internal configuration. ### Mechanical & Environmental * **Seal Level:** Often comes with an IP64 or IP68 rating (depending on the specific sub-series configuration) to resist dust and moisture. * **Operating Force:** Standard force is approximately 2.5 lbs to actuate the switch. --- ## Wiring Diagram (SPST - Normally Open) The electronic circuit for this switch is simple. When the button is pressed, the contact closes, allowing current to flow to the load. ```text [ Power Source ] | ________|________ | (Pin 1) | | / (Switch) | <--- Momentary Action |___/____(Pin 2)__| | [ Load ] | [ Ground ] ``` *Note: The LED terminals are separate from the switch contacts, allowing the light to be controlled independently or synced with the switch state.*