The MKA14103 is a compact, high-reliability glass encapsulation magnetic reed switch designed for precise proximity sensing, count tracking, and non-contact limit switching. Featuring a Single-Pole Single-Throw, Normally Open (SPST-NO) configuration, the contacts close instantly when a magnetic field is introduced and open when the magnet is removed.
With its standard 10-15AT magnetic sensitivity rating, this miniature switch triggers reliably with small permanent magnets, making it an excellent choice for custom alarm systems, micro-robotics, automated flow meters, and space-constrained DIY microcontroller projects.
Key Applications
- Security & Alarms: Concealed window and door open/close sensors.
- Smart Meters: Pulse counting for water, gas, and electricity flow meters.
- Industrial Automation: Pneumatic cylinder position sensing and non-contact limit switches.
- Consumer Electronics: Lid/cover close detection for laptops and smart devices.
Specifications
- Model: MKA14103 (MKA-14103)
- Contact Form: Form A (SPST-NO Normally Open)
- Glass Length: 14 mm
- Glass Diameter: 2.0 mm
- Total Length (including leads): Approximately 44 mm
- Actuation Range (Sensitivity): 10 - 15 AT(Ampere-Turns)
- Maximum Switching Voltage: 100V DC/AC}
- Maximum Switching Current: 0.5A
- Maximum Contact Rating (Power): 10W
- Contact Resistance: Less than 100mOhm
Features
- Hermetically Sealed: The precious-metal contacts are sealed inside an inert gas atmosphere within the glass tube, protecting them from dust, humidity, and corrosion for millions of cycles.
- Flexible Axial Leads: Tough, tin-plated leads can be easily bent or trimmed for printed circuit board (PCB) mounting or breadboard prototyping.
- Zero Power Consumption: Requires no standby power to operate; the switch is actuated entirely by physical magnetic fields.
Installation Note: Reed switches are made of glass and are fragile. When bending or trimming the axial leads, always hold the lead securely with a pair of long-nosed pliers between the glass body and the bend point. This prevents stress from cracking the glass-to-metal seal, which can ruin the vacuum and cause the switch to fail.
What's in the box?
5 x Normally Open Reed Switch MKA14103
Note: Stock is currently available in South Africa for national shipping!
