The part number **LP4-OA-1-R-B-C-N-R** refers to a specific configuration of the **LP4 Series Low-Profile Illuminated Pushbutton Switch** manufactured by **E-Switch**. This series is commonly used in audio/visual equipment, instrumentation, and telecommunications due to its compact size and tactile feedback. ### Component Breakdown The part number is a composite code where each letter/number represents a specific physical or electrical attribute. | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | **LP4** | Low-profile, square pushbutton switch. | | **Function** | **OA** | **Maintained (Latching):** Push once to turn on (lock), push again to turn off. | | **Circuit** | **1** | **SPDT:** Single Pole Double Throw. | | **Housing Color** | **R** | **Red** Housing. | | **Button Style** | **B** | Large Square Button. | | **Button Color** | **C** | **Clear** Cap (usually used with internal illumination). | | **Legend** | **N** | **None:** No printed icons or text on the button. | | **LED Color** | **R** | **Red LED:** Indicates the illumination color. | --- ### Technical Specifications Below are the typical electrical and mechanical ratings for this specific switch configuration: | Parameter | Specification | | :--- | :--- | | **Contact Rating** | 100mA @ 30VDC | | **Electrical Life** | 50,000 Cycles | | **Contact Resistance** | 50mΩ Max (Initial) | | **Insulation Resistance** | 100MΩ Min @ 500VDC | | **Dielectric Strength** | 500VAC for 1 minute | | **Operating Force** | 150 ± 50 gf | | **Travel** | 1.5mm (Full Travel) | | **Operating Temp** | -20°C to +70°C | --- ### Key Features * **Latching Mechanism:** Unlike a momentary switch, the "OA" designation means the switch stays in its actuated state until pressed a second time. * **Illumination:** The "R" at the end specifies a Red LED. This requires a current-limiting resistor (not built into the switch) when connecting to a power source. * **Mounting:** Designed for through-hole PC board mounting (Right-angle versions exist, but this standard code usually implies vertical/straight pins).