The **LP4-OA-1-R-G-C-R-Y** is a specific part number for a high-quality, illuminated push-button switch manufactured by **E-Switch** (LP4 Series). This switch is commonly used in control panels, audio equipment, and industrial interfaces. ### 1. Part Number Breakdown The alphanumeric string defines the mechanical and electrical characteristics of the component: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | LP4 | Square/Rectangular Illuminated Pushbutton | | **Circuit** | OA | Alternate Action (Push-on, Push-off / Latching) | | **Actuator** | 1 | Standard Actuator Style | | **LED 1** | R | Red LED | | **LED 2** | G | Green LED | | **Cap Style** | C | Square Cap | | **Cap Color** | R | Red Cap | | **Legend** | Y | Specific Legend/Graphic (Varies by custom order) | --- ### 2. Electrical Specifications This switch is designed for low-power signal switching rather than high-voltage power lines. * **Contact Rating:** 100mA @ 30VDC. * **Contact Resistance:** 50mΩ Max (Initial). * **Insulation Resistance:** 100MΩ Min @ 500VDC. * **Dielectric Strength:** 500VAC for 1 minute. * **Operating Life:** 50,000 cycles. --- ### 3. Key Physical Features * **Latching Mechanism:** Unlike a momentary switch (which springs back immediately), the "OA" designation means this switch stays in the down position until pressed again. * **Dual-LED Configuration:** This model features both **Red** and **Green** LEDs. This allows for status indication (e.g., Red for "Off/Error" and Green for "On/Ready"). * **Mounting:** Designed for **Through-Hole (PBT)** mounting on a Printed Circuit Board (PCB). * **Travel:** Full travel distance is approximately 3.0mm. --- ### 4. Typical Internal Schematic The switch typically features 6 pins for the switch circuit (DPDT configuration) and additional pins for the independent LED anodes and cathodes. ```text Pins 1-3: Pole A (Common, NO, NC) Pins 4-6: Pole B (Common, NO, NC) L1, L2: LED Anode/Cathode connections ``` ---