Magnetic Reed Switch 12mm

Description:

• A reed switch consists of two ferromagnetic reeds (thin, flexible metal strips) sealed within a glass tube filled with an inert gas.   
• When a magnetic field is brought near the switch, the reeds are attracted to each other, closing the circuit.   
• When the magnetic field is removed, the reeds spring back to their original position, opening the circuit.   
• The 12mm designation often refers to the length of the glass tube portion of the switch.

Key Features:

• Non-contact switching: Operates without physical contact, increasing lifespan.   
• Hermetically sealed: Protected from environmental factors like dust and moisture.   
• Small size: Enables use in compact devices.
• Low power consumption: Requires minimal power to operate.   
• Fast switching speed: Can switch rapidly.   
• Reliability: simple construction leads to high reliability.
• Versatility: Can be used in various applications.   

Applications:

• Security systems: Door and window sensors.   
• Automotive: Position sensing, fluid level detection.   
• Home appliances: Limit switches, position sensors.   
• Industrial automation: Proximity sensing, control systems.   
• Electronics: Relays, counters, and other electronic circuits.   
• Medical devices: various sensing applications.   

Specifications:

• Switching voltage: Varies (e.g., 24V DC, up to several hundred volts).
• Switching current: Varies (e.g., from milliamps to amps).   
• Contact type: Normally open (NO) or normally closed (NC).   
• Operating temperature: Wide range (e.g., -50°C to 140°C).
• Glass tube length: Approximately 12mm (variations exist).
• Overall length: varies depending on the leg length.
• Contact resistance: low ohms.   
• Lifecycle: number of operations before failure.

DATA SHEET AND USECASE

Datasheet for 12mm Magnetic Reed Switch:

The MATE-12B Reed Switch by Littelfuse is a sub-miniature, normally open switch with a 12.70 mm length and 1.80 mm diameter (0.500" x 0.071") glass envelope. Key specifications include:

• Switching Voltage: Capable of switching up to 200 VDC at 10 W.
• Insulation Resistance: Minimum of 10¹² ohms, ensuring high reliability.
• Contact Resistance: Less than 100 milliohms, indicating low resistance for efficient operation.