SW-520D Vibration Sensor Metal Ball Tilt Switch

SW-520D Vibration Sensor Metal Ball Tilt Switch is a highly reliable, gold-plated dual-metal ball tilt and vibration sensing component designed for motion detection and orientation triggering in low-power electronic circuits. This compact component features two internal metallic rolling balls that complete or break an electrical connection inside a sealed tube whenever the sensor tilts past a specific angle or experiences mechanical shaking. Consequently, it provides a straightforward, digital ON/OFF trigger without requiring complex signal processing or heavy computational resources from your microcontroller. The switch body uses heat-shrink tubing to seal against environmental contaminants, ensuring long-lasting operation in diverse environments. Furthermore, its simple contact mechanism consumes virtually zero standby current during idle states. Therefore, you can seamlessly integrate the SW-520D into battery-powered devices, safety alarms, and interactive robotics to detect physical movement efficiently.

Key Features:

• High Sensitivity Detection: The dual metallic ball mechanism triggers reliable contact state changes when tilted beyond ≈ 15° to 45° from horizontal.
• Sealed Construction: Heat-shrink insulation seals the metal tube against dust and moisture, extending operational life and preventing short circuits.
• Zero Idle Power Draw: It operates as a passive mechanical switch, consuming power only when current flows through its closed circuit path.
• Non-Directional Triggering: The internal layout enables the sensor to detect tilt or movement across multiple spatial axes.
• Gold-Plated Terminals: Gold-plated leads minimize contact resistance and resist oxidation over extended usage periods.

Technical Specifications:

• Maximum Voltage (V_max): 12 V_DC
• Maximum Current (I_max): 5 mA
• Conduction Resistance: < 10 Ω (Closed state)
• Insulation Resistance: > 10 MΩ at 100 V_DC (Open state)
• Operating Temperature Range: −40°C to +80°C
• Switching Life Expectancy: Up to 100,000 cycles

Mechanical Specifications:

• Contact Mechanism: Dual Metal Rolling Balls (Gold/Silver Plated)
• Package Type: Tubular Radial Package (Through-Hole)
• Outer Sheath Material: Insulated Heat-Shrink Tubing
• Vibration Resistance: Designed to trigger on mechanical shock and motion

Dimensions:

• Body Diameter: ≈ 5.2 mm
• Body Length: ≈ 12.0 mm
• Lead Length: ≈ 10.0 mm
• Lead Diameter: ≈ 0.6 mm
• Total Weight: ≈ 0.6 g

Pinout and Wiring:

• Terminal 1 (Anode/Signal In): Connect this terminal to a microcontroller digital input pin configured with an internal or external pull-up resistor.
• Terminal 2 (Cathode/GND): Connect this terminal directly to the system ground (0 V) line.
• Wiring Note: However, software debouncing in your controller code is recommended to prevent false triggers caused by mechanical contact bounce during movement.

Datasheet Reference:

• Download SW-520D Tilt Switch Datasheet

Commonly Used in:

• Microcontroller Development: Serving as a simple motion-sensing input for Arduino, ESP32, and Raspberry Pi projects.
• Security Systems: Detecting unauthorized movement, tampering, or tipping of equipment and enclosures.
• Consumer Electronics: Toggling display orientation or activating sleep modes when devices change physical position.

Applications:

• Anti-Tilt Protection: Automatically shutting off space heaters or electric appliances if overturned to prevent fire hazards.
• Interactive Toys: Triggering sound modules or light patterns in toys upon shaking or movement.
• Vibration Alarm Triggers: Activating buzzers or notification modules when sensing mechanical disturbance in parked vehicles or safes.

Equivalent Models:

• SW-200D: A smaller single-ball tilt switch variant offering similar functionality with lower current ratings.
• SW-520: The non-D suffix version featuring a single internal rolling ball for basic directional tilt switching.
• SW-18010P: A spring-based vibration sensor offering higher sensitivity to rapid mechanical shocks rather than static tilt angle.

Package Includes:

• 1 x SW-520D Vibration Sensor Metal Ball Tilt Switch