SPDT 5V Relay Module – 5-Pin PCB Mount Type The SPDT 5V PCB Mount Relay (Single Pole Double Throw) is an electromechanical switch that allows low-power digital circuits like microcontrollers to control high-voltage AC or DC devices. Operating at just 5V DC, this relay is widely used in automation, home appliances, IoT projects, robotics, and switching applications. The 5-pin design makes it easy to mount directly onto a PCB, and the SPDT configuration means it has one common terminal that can be connected to either of two outputs (Normally Open or Normally Closed), offering flexible switching options. Key Features ✅ SPDT (Single Pole Double Throw) configuration ✅ Operates on 5V DC coil voltage ✅ Capable of switching AC and DC loads ✅ 5-pin PCB mountable package for easy soldering ✅ Isolation between control and switching circuits ✅ Compact and durable design ✅ Ideal for switching motors, lamps, fans, solenoids, and more Technical Specifications Parameter Specification Relay Type Electromechanical Configuration SPDT (Single Pole Double Throw) Coil Voltage 5V DC Coil Resistance ~70Ω ±10% Operating Current ~70–100 mA Contact Rating (AC) 250V AC at 10A Contact Rating (DC) 30V DC at 10A Contact Material Silver Alloy Switching Time (ON/OFF) ~10 ms / 5 ms Insulation Resistance ≥ 100MΩ (500VDC) Dielectric Strength Between coil and contacts: 1500VAC, 1 min Mechanical Life ≥ 10 million operations Electrical Life ≥ 100,000 operations at rated load Mounting Type Through-hole (PCB mount) Number of Pins 5 Body Dimensions (approx.) 19mm x 15.5mm x 15.5mm Weight ~10g Pin Configuration (5-Pin Relay) Pin Number Pin Name Description 1 Coil Pin 1 Connect to 5V DC 2 Coil Pin 2 Connect to GND 3 Common (COM) Common terminal for NO and NC 4 Normally Closed (NC) Connected to COM when relay is off 5 Normally Open (NO) Connected to COM when relay is on Applications Home automation systems Switching AC appliances with microcontrollers Robotic control systems DIY IoT devices Smart home projects Timer-based control circuits Motor and light control circuits
