The **SVB-G8W-R/E** is a specialized electronic component, typically categorized as a **Vandal-Resistant Illuminated Push Button Switch**. These components are widely used in industrial control panels, elevators, and public kiosks where durability and visual feedback are required. Below is a breakdown of its technical specifications and electronic characteristics. --- ### 1. General Specifications | Feature | Description | | :--- | :--- | | **Model** | SVB-G8W-R/E | | **Mounting Diameter** | Usually 16mm or 19mm (depending on series standard) | | **Illumination Type** | Ring LED (indicated by "R") | | **Illumination Color** | Typically Red (R) or White (W) depending on suffix | | **Contact Type** | Momentary or Latching (usually 1NO1NC) | | **Protection Rating** | IP65 / IK08 (Waterproof and Vandal resistant) | --- ### 2. Key Electronic Components #### A. LED Circuitry (The "R/E" Suffix) * **Voltage:** These switches usually contain an internal current-limiting resistor. Common operating voltages are **12V DC** or **24V DC**. * **Polarity:** The LED terminals are marked with `+` and `-`. Connecting them in reverse will result in no light, though most modern versions have protection diodes. * **Illumination Style:** The "R" usually denotes a **Ring** illumination style around the actuator, providing high visibility in low-light environments. #### B. Contact Mechanism The internal switching mechanism is designed for low-to-medium power signal switching: * **Contact Resistance:** Usually $< 50m\Omega$. * **Insulation Resistance:** $> 1000M\Omega$. * **Switching Capacity:** Typically rated for **3A to 5A at 250V AC**. It is not intended for high-current motor loads without a relay. #### C. Terminals The back of the switch typically features 5 terminals: 1. **C (Common):** The main input line. 2. **NO (Normally Open):** Circuit closes when the button is pressed. 3. **NC (Normally Closed):** Circuit opens when the button is pressed. 4. **LED (+):** Positive power for the light. 5. **LED (-):** Ground/Negative for the light. --- ### 3. Application Use-Cases * **Access Control:** Used in security intercoms. * **Industrial Automation:** Emergency stop or start buttons for machinery. * **Automotive/Marine:** Dash switches for custom builds due to the IP65 rating. --- ### 4. Wiring Diagram (Typical) To wire the switch so the light turns on only when pressed: ```text Source (+) ----> Terminal C Terminal NO ----> Load (+) AND LED (+) Source (-) ----> Load (-) AND LED (-) ```