Samlex America’s SEC-1235 and SEC-1235M are 30- to 35-amp switch-mode power supplies. The models offer a radio-frequency noise current of less than 5 milliamps. The SEC-1235M comes standard with a voltmeter and an ammeter, an instrument used to measure the flow of electric current in a circuit. Both models include a three-year warranty and Underwriters Laboratories’ safety certification for information technology equipment power supplies. They meet the FCC’s Part 15(B) specifications regarding the limits on electromagnetic interference for Class B digital devices.