32mm 3-Pin Reed Switch (NO/NC)

The 32mm 3-Pin Reed Switch is a highly versatile electronic component, activated by a magnetic field. It houses metallic reeds within a glass tube, which either converge or diverge in response to a magnetic field.

📏 Dimensions

• Length: The glass tube measures 32mm.
• Pin Count: The switch features 3 pins, typically designated as Common (COM), Normally Open (NO), and Normally Closed (NC).

⚙️ Operational Principle

The reed switch operates on a simple yet effective principle. When a magnet is brought close, the internal reeds respond to the magnetic field, either closing or opening the circuit. In 3-pin models, the operation is usually as follows:

• Middle Pin: Common (COM)
• One Side Pin: Normally Open (NO)
• Other Side Pin: Normally Closed (NC)

This configuration enables the detection of both the presence and absence of a magnetic field, each with distinct output signals.

⚡ Electrical Specifications

• Maximum Switching Voltage: Typically up to 100V DC (may vary by model)
• Maximum Switching Current: Approximately 0.5A
• Maximum Carry Current: Around 1A (on some models)
• Switching Time: Extremely swift, typically in the range of milliseconds

🧲 Applications

The 32mm 3-Pin Reed Switch is suitable for a wide range of applications, including:

• Security systems (door/window sensors)
• Counters
• Automation systems
• Bicycle speedometers
• Arduino and other microcontroller projects

⚠️ Important Considerations

• The glass tube construction makes the switch fragile, so handle with care during installation.
• Trigger sensitivity may vary depending on the orientation and distance of the magnet.