52mm Reed Switch NO NC 3 Pin

The 52mm Reed Switch NO NC 3 Pin is an electromechanical device designed to switch low voltage and current circuits. It employs two flexible metal strips, also known as reeds, made from ferromagnetic material and housed within a glass tube. The switch's operation is based on the closing or opening of contacts under the influence of an external magnetic field.

Key Features

• Magnetic Interaction: The reed switch's operation is based on magnetic fields. The metal strips inside the switch make contact to close the circuit when a magnetic field is applied. Conversely, the circuit opens when the magnetic field is removed.
• Variety of Types: The reed switch comes in several types, including Normally Open (NO), Normally Closed (NC), and Changeover (SPDT). The NO type closes the circuit when a magnetic field is applied, while the NC type opens the circuit under the same conditions.
• Durability: The glass tube housing the metal strips shields them from environmental factors, enhancing the switch's durability and reliability.
• Compact Size: The reed switch's small and lightweight design makes it suitable for a wide range of electronic and mechanical systems.

Technical Specifications

• Voltage Range: 3.3V ~ 60VDC
• Load Current Max.: 2A
• Switching Current: 1A
• Max Contact Rating: 60W
• Mech. & Electrical Lifecycle: ≈ 100,000
• Contact Resistance: 100mΩ
• Insulation Resistance: 1E9
• Operating Temperature Range: -50 to 140°C
• Length: 28 mm
• Approx Weight: 5 g

Applications

• Sensor Systems: Used in door and window alarm sensors, bicycle speedometers, and for detecting the presence or absence of a magnetic field.
• Electronic Devices: Employed in computer keyboards, household appliances, medical devices, and various electronic gadgets.
• Automotive Industry: Used to detect the position of doors, seat belts, and other movable parts in vehicles.
• Industrial Automation: Utilized for position and movement detection in industrial machines and equipment.

Advantages

• Electrical Isolation: The glass tube isolates the contacts from environmental factors, ensuring high reliability.
• Low Power Consumption: Operates with low power due to its magnetic operation.
• Long Lifespan: Minimal wear and tear since there are no mechanical contacts, leading to a long operational life.
• High-Speed Switching: Responds within milliseconds, suitable for applications requiring quick switching.

Disadvantages

• Magnetic Interference: Can be affected by nearby magnetic fields, causing unwanted switching.
• Fragility: The glass tube can be fragile and prone to damage from physical impact.
• Limited Current Capacity: Not suitable for high current applications.

Example Connection

You can use a reed switch with an Arduino to create a simple circuit, such as turning on an LED when the reed switch is activated:
 

int reedPin = 2; // Pin connected to the reed switch
int ledPin = 13; // Pin connected to the LEDvoid setup() {
  pinMode(reedPin, INPUT);
  pinMode(ledPin, OUTPUT);
}void loop() {
  int reedState = digitalRead(reedPin); // Read the state of the reed switch  if (reedState == HIGH) {
    digitalWrite(ledPin, HIGH); // Turn on the LED
  } else {
    digitalWrite(ledPin, LOW); // Turn off the LED
  }
}

The 52mm Reed Switch NO NC 3 Pin is a versatile and reliable switching device that operates using a magnetic field. It is ideal for low voltage and current applications and is widely used in sensor systems, electronic devices, the automotive industry, and industrial automation. The advantages include low power consumption, high reliability, and a long lifespan. However, they can be affected by magnetic interference and are not suitable for high current applications. The compact and durable design makes reed switches an essential component in many applications.