9 volt power supplies are generally used in sensor and metering. Today's 9 volt power supplies are divided between linear and switching, with 9 volt switching power supplies moving to the forefront. Hi current 9 volt power supplies in use today are almost always switching types. We stock a wide range of commercial and industrial 9V power supplies. Our supplies cover the range of small, compact wall supplies and desktop supplies to several hundred watt enclosed units. All our 9 volt power supplies have multi agency approvals and are suitable for OEM or replacement use.