5mm Mercury Switch

5mm Mercury Switch is a compact tilt or vibration-activated switch that uses a small amount of mercury sealed inside a glass capsule. When the switch is tilted at a specific angle, the mercury flows to make or break the electrical contact. It provides highly reliable switching with no bounce or mechanical wear, making it suitable for position sensing, motion detection, and tamper alarms.

Key Features:

• Compact Size: 5mm diameter glass body for tight installations.
• Tilt Activated: Switches ON or OFF based on tilt angle or vibration.
• Reliable Operation: Offers consistent contact without bouncing.
• Hermetically Sealed: Resistant to dust, moisture, and corrosion.
• Long Life: No mechanical parts lead to longer durability.

Technical Specifications:

• Switching Angle: Typically between 10° to 45° tilt
• Operating Voltage: 12V DC (typical)
• Switching Current: Up to 100mA
• Contact Resistance: Less than 100mΩ
• Contact Type: Normally open (closes when tilted)
• Operating Temperature: -20°C to +60°C

Mechanical Specifications:

• Body Diameter: 5mm (glass tube)
• Length: Approximately 20mm (including leads)
• Lead Type: Tinned copper leads for soldering
• Enclosure: Sealed glass capsule

Mounting Options:

• Through-Hole Mount: Suitable for insertion in PCBs or terminal lugs
• Adhesive/Clamp Fixing: Can be mounted with support clips or glue in enclosures

Schematic Diagram, Connection, Wiring and Pinout:

• Connection: Two leads, connected in series with a circuit or input pin
• Polarity: Non-polarized; can be connected either way
• Wiring: Use insulated wire if exposed in enclosure or soldered directly on PCB

Datasheet and User Manual:

• Download Mercury Tilt Switch Datasheet (PDF)

Applications:

• Tilt Detection: Detect angular change in alarm or motion systems
• Position Sensing: Senses device orientation in robotics or control panels
• Anti-Theft Devices: Activates buzzer or alarm when moved
• Power Control: Used in battery-operated lights or toys based on tilt
• Automatic Shutoff: In heaters or appliances when tilted beyond safe angle

Equivalent Models:

• SW-200D: Vibration-activated tilt switch with similar form factor
• Reed Tilt Sensor: Mechanical-free mercury alternative using reed contact
• Ball Tilt Switch: Inexpensive mechanical replacement for angle sensing

Package Includes:

• 1 x 5mm Mercury Tilt Switch