Enclosed AC-DC switching single output power supply with single output and DC-DC converter. Output voltage rate oscilating between 12 VDC and 48 VDC (depending on the chosen model, the current tension may vary from 11.5A to 2.9A, respectively). With power LED indicator and overloading protection, short-circuit and over voltage. Cooling by free air convection. Fixed switching frequency at PFC 67 KHz and PWM 134 KHz.