【Name】: MC-31 NC Magnetic Reed Switch. | 【Specifications】: Material: fireproof ABS material, rated voltage: 100V; contact capacity: 500(mA) (maximum switching current), rated power: 10W (maximum switching power); contact type: NC, triggering range: 15-25mm . Overall Dimensions: 65 x 19 mm / 2.56" x 0.75" (L*W). White makes the home big and beautiful. | 【Switch Type】: NO means normally open: when the magnets are separated, the circuit is turned on (the light is on); when the magnets are together, the circuit is not turned on (the light is off), NC means normally closed: when the magnets are together, the circuit is turned on ( The light is on); when the magnet is separated, the circuit is non-conductive (the light is off). | 【Application】: MC-31 NC reed switch is an electrical switch operated by an external magnetic field. Designed for use in alarm systems. Ideal for windows, doors in homes and factories. etc. Important: connect when near the magnet, disconnect when the magnet moves away. Wired magnetic door/window contacts can be added to wireless/wired alarm systems. (some wireless systems have a wired area) | 【Package Included】: 3 sets x MC-31 Reed Switch. (including mounting screws). Here's our 90-day money-back risk-free purchase guarantee, ›See more product details