The RAC20NE-12SK/277/OF is a 20W open-frame AC/DC power supply module designed to convert universal AC input voltages into a stable 12VDC output. It operates over a wide input range of 85-305VAC, delivering a continuous output power of 20W with a nominal current of 1667mA and a typical efficiency of 87%. This model features an operating temperature range of -40°C to +85°C, an OVC II rating for operation up to 5000m, and includes protections for short circuit, overcurrent, and overvoltage. With its compact open-frame design, low no-load power consumption of under 100mW, and high immunity levels, it is well-suited for space-critical industrial, energy management, and automation applications.