The Alter® SM-845 is an air-cooled power supply for a 2 kW magnetron. It is able to power and control most types of magnetrons on the market with nominal power of 2 kW @ 2.45 GHz. Depending on the model, output power can be adjusted continuously, from 10% up to 100%, using an external analog signal from 1 to 10VDC, or by remote control through Fieldbus interface or front panel commands. The SM 845 Microwave Power Supply is a resonant switch-mode power supply with a power factor correction stage (PFC) that improves the efficiency of the entire system. It accepts input line voltage ranging from 180 VAC to 250 VAC. The SM 845 is designed to be used with the Alter TMx20 or TI020 microwave heads, however it may be used to power microwave head developed by other manufacturers (if electrically compatible). The SM 845 autonomously manages magnetron status, driving the correct pre-heating of the filament, adjusting filament voltage according to the specific back down curve, and shutting off the output in any alarm event condition, such as over-current or over-voltage of the magnetron. The electrical wiring utilizes industrial connectors, including the high voltage output, carrying the anodic current, that has a specific connector. Any electrical function has a separate connector leading to a simple and easy set up. The SM 845 has a front panel 19" wide and 2U in height, is built with a rugged steel base and an easily removable aluminum cover. The air cooling flow enters from the sides and exits from the rear.