Coto Technology introduced its RedRock RS-A-2515 Microelectromechanical Systems (MEMS)-based magnetic reed switch at Design West in San Jose.  Based on its high aspect ratio MEMS design and manufacturing processes, the switch is said to provide all of the advantages of conventional magnetic reed switch technology, including zero power operation and high-power hot switching.


The switch has a footprint of less than 2.1 mm2 (1.01 x 2.08 mm), is 0.94 mm high and is claimed by the company to be the smallest MEMS-based reed switch available on the market today. The first of a new Coto Technology switch family, the switch exhibits all of the high performance characteristics inherent in classical reed switches, according to the company. These include closure sensitivity ranges from 5 to 25 millitesla, permitting operation up to 20mm using a small NdFeB magnet. The switch has a release sensitivity greater than 15 millitesla (5mT), minimizing the risk of sticking when the magnetic field is removed.  The RS-A-2515 has a maximum switching voltage of 100 VDC with a switching current of 50mA DC or 35mA AC, RMS.  Its zero operating power is a key advantage in power sensitive applications, particularly those operating with battery power.