The part number **LP4-EE-1-R-G-C-N-R** refers to a specific configuration of a **Pushbutton Switch** from the LP4 series, commonly manufactured by E-Switch. These are high-quality, illuminated, right-angle switches often used in audio/visual equipment and instrumentation. ### 1. Part Number Breakdown The alphanumeric code identifies the physical and electrical characteristics of the switch: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | LP4 | Low profile, illuminated pushbutton switch | | **Function** | EE | Latching (Push-on, Push-off) | | **Circuit** | 1 | SPST (Single Pole Single Throw) | | **LED 1** | R | Red LED | | **LED 2** | G | Green LED (Bi-color) | | **Cap Style** | C | Square Cap | | **Cap Color** | N | None (Usually indicates a clear or frosted cap for illumination) | | **Mounting** | R | Right Angle PC Pin mounting | --- ### 2. Electrical Specifications These switches are designed for low-power signal switching rather than high-current power applications. * **Contact Rating:** Typically 100mA @ 30VDC. * **Contact Resistance:** 50m$\Omega$ Max (initial). * **Insulation Resistance:** 100M$\Omega$ Min @ 500VDC. * **Dielectric Strength:** 500VAC for 1 minute. * **Operating Life:** ~50,000 cycles. --- ### 3. Key Electronic Components #### A. The Latching Mechanism ("EE") Unlike a momentary switch that returns to its original position immediately, the "EE" designation indicates a **Maintained** action. When pressed, the circuit closes and stays closed until the button is pressed a second time. #### B. Bi-Color LED Configuration ("R-G") This part features two integrated LEDs: **Red** and **Green**. * Depending on how the pins are wired, the switch can glow Red, Green, or Amber (if both are powered simultaneously). * LEDs usually require external current-limiting resistors (typically 220$\Omega$ to 1k$\Omega$ depending on your $V_{cc}$). #### C. Termination ("R") The **Right Angle** pins allow the switch to be mounted on a PCB such that the button faces the side of the enclosure. This is essential for rack-mounted equipment or side-panel interfaces. --- ### 4. Schematic Representation The typical pinout for an illuminated LP4 switch involves the switch contacts and the LED terminals: ```text Pin 1 & 2: Switch Contacts (Normally Open) Pin L1 (+): Red LED Anode Pin L2 (+): Green LED Anode Pin C (-): Common Cathode (or separate ground depending on internal layout) ``` ---