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
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