MC-38 Window/Door Magnetic Sensor (Normally Open — NO) is a magnetic contact switch used in security systems, alarm panels, smart-home automation, and similar applications to detect whether a door or window has been opened or closed. It uses a reed switch and a magnet to sense position changes.
Specifications
Model: MC-38 Magnetic Sensor (Normally Open)
Switch Type: Normally Open (NO) — circuit is open in the absence of a magnetic field and closes when the magnet is near.
Contact Configuration: Single-pole single-throw (SPST), NO.
Rated Voltage: Up to ~100 V DC (typical)
Rated Current: ~0.5 A (max) switching capacity
Rated Power: ~10 W max
Contact Resistance: Low; typically <100 Ω (varies by source)
Actuation Distance (Magnetic Gap): ~10–25 mm (varies depending on magnet strength and alignment)
Operating Temperature Range: ~–10 °C to +60 °C (varies by supplier)
Housing Material: ABS plastic (white)
Dimensions: ~27–28 mm × 14 mm × 8 mm (sensor body)
Cable / Lead Length: ~25–30 cm wire leads
Mounting Method: Surface-mount with screws or adhesive tape
Weight: Lightweight (usually ~8–16 g depending on exact design)