The **LP2W-27S-R-Z** is a high-quality, illuminated push-button switch manufactured by **Nidec Components (formerly Copal Electronics)**. It belongs to the LP series, designed specifically for applications requiring high reliability and a compact footprint. --- ### 1. Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | Nidec Components (Copal) | | **Circuit Type** | DPDT (Double Pole Double Throw) | | **Switch Function** | Momentary (Non-Latching) | | **Current Rating** | 3A @ 125VAC / 3A @ 250VAC | | **Contact Resistance** | 50 mΩ Max | | **Illumination** | LED (Red) | | **Termination Style** | PC Pin (Through-hole) | | **Operating Force** | 1.96 ~ 2.94 N | --- ### 2. Part Number Breakdown Understanding the suffix codes helps in identifying the specific variant: * **LP2W**: Series identifier (Small, illuminated push-button). * **27**: Designates the specific size or internal configuration (often linked to the DPDT circuit). * **S**: Silver contacts (Standard for power switching). * **R**: **Red** LED color for the illumination. * **Z**: RoHS compliant / Standard specification indicator. --- ### 3. Key Electronic Components & Features #### A. Internal Contact Mechanism The **DPDT (Double Pole Double Throw)** configuration allows the switch to control two separate circuits simultaneously. Because it is **momentary**, the circuit is only engaged while the button is being physically pressed. #### B. Integrated LED The unit features a built-in **Red LED**. Note that LEDs are polarity-sensitive; the terminal pins for the LED are separate from the switch contacts. You typically need a current-limiting resistor in series with the LED to prevent burnout. #### C. Snap-Action Feedback These switches are known for a crisp, tactile "click" (snap-action), providing the user with physical confirmation that the connection has been made. --- ### 4. Application Use Cases Due to its robust rating and illuminated status, this part is commonly found in: * **Industrial Control Panels:** As a reset or start button. * **Audio/Video Equipment:** For channel switching or signal routing. * **Medical Devices:** Where reliable, visible feedback is required. * **Test & Measurement Tools:** For mode selection.