The **SVB-5WD-R** is a specific model of a **Miniature Signal Relay** manufactured by **Original (OUPIIN)** or similar electronic component manufacturers. It is widely used in telecommunications, security systems, and control circuits where low power consumption and high reliability are required. --- ### 1. Key Technical Specifications The following table highlights the primary electrical and physical characteristics of the SVB-5WD-R: | Parameter | Specification | | :--- | :--- | | **Relay Type** | Non-Latching (Monostable) | | **Coil Voltage** | 5V DC | | **Contact Form** | SPDT (1 Form C) | | **Contact Rating (Resistive)** | 1A @ 120V AC / 2A @ 24V DC | | **Max Switching Voltage** | 220V AC / 60V DC | | **Coil Resistance** | ~167 Ω (approx. 150mW power consumption) | | **Mounting Type** | Through-Hole (PCB) | | **Termination Style** | PC Pin | --- ### 2. Internal Electronic Parts and Construction The SVB-5WD-R consists of several internal sub-components that work together to perform the switching action: 1. **Electromagnetic Coil:** A copper wire winding around a core. When 5V DC is applied, it creates a magnetic field. 2. **Armature:** A moving metal piece attracted by the magnetic field of the coil. 3. **Spring Mechanism:** Returns the armature to its original position once the power to the coil is removed. 4. **Contacts (AgNi or Ag alloy):** * **Common (COM):** The moving terminal. * **Normally Closed (NC):** Connected to COM when the coil is OFF. * **Normally Open (NO):** Connected to COM when the coil is ON. 5. **Sealed Housing:** Typically a plastic PBT enclosure designed to protect internal parts from dust and soldering flux. --- ### 3. Application Circuit Example When driving this relay with a microcontroller (like an Arduino or ESP32), a "Flyback Diode" is required to protect the electronics from voltage spikes. ```cpp // Basic Logic for Relay Control void setup() { pinMode(2, OUTPUT); // Connect to a Transistor/MOSFET gate driving the relay } void loop() { digitalWrite(2, HIGH); // Relay ON (COM connects to NO) delay(1000); digitalWrite(2, LOW); // Relay OFF (COM connects to NC) delay(1000); } ``` --- ### 4. Comparison of Advantages * **Low Power Consumption:** The "WD" designation usually indicates a high-sensitivity coil, drawing minimal current from the power supply. * **Small Footprint:** Ideal for high-density PCB layouts. * **Isolation:** Provides excellent galvanic isolation between the low-voltage control side (5V) and the high-voltage load side (up to 120V AC).