MidNite’s breakers are rated to break the full rated load at the rated voltage repeatedly, with NO DAMAGE. They fit all Midnite solar combiner boxes as well as many other types of electrical enclosures with Din rail mounting systems. They are available in voltage ranges of 150VDC and 300VDC and Amperage ranges from 1 to 100 Amps. they are a perfect choice to protect your solar system investment. Always use a properly sized breaker for disconnecting. Safety First. MidNite breakers have been evaluated by ETL to 150VDC and are listed for US and Canada. All MidNite circuit breakers can be used at 100% rated current when mounted in a MidNite Solar enclosure.