PCB mounted

Modern electronics assemblies are designed to be very power efficient, so that they only draw a few watts of power. For such applications, RECOM has developed a wide range of Class II 1W-10W ac dc power supplies for PCB mounting, designed to withstand PCB wave soldering processes. These ac dc converters are complete power supplies, requiring no external components to fully meet safety and EMC regulations without an earth connection. They are offered with 85 VAC to 264 VAC or 305 VAC universal input voltage range for worldwide use and the RAC05-K/480 series can additionally operate from phase-to-phase with its 85 VAC to 528 VAC input range.

We use the latest advances in switching controllers, topologies and components to create power supplies with double the power density than previously possible without sacrificing safety, reliability, efficiency or performance. The majority of our AC/DC power supplies are internationally certified to UL/IEC/EN standards for industrial (62368-1), measurement, control, and laboratory (61010-1), and household (60335-1) applications with CB Reports, making them suitable for industrial, test and measurement and building automation applications.

While three-phase AC supplies are used for high-power loads, there is often a need to generate low-power auxiliary DC rails from the same source. Typically, this is either from line to neutral at 400VAC, or line to line at 480VAC or 277VAC nominals. This can be achieved efficiently and conveniently with AC/DC modules with an input range of 85VAC to 528VAC, including the highest nominal voltage and tolerances. The operation to 85VAC minimum also makes the parts compatible with single-phase AC supplies down to 100VAC nominal.

AC/DC modules connected to three-phase supplies normally need to withstand higher voltage transients than those connected to single-phase AC within buildings. The modules, therefore, need to be rated Over-Voltage Category III (OVC III) minimum. Similarly, AC/DC modules connected to three-phase AC are often situated in harsh environments and should therefore be robust, able to operate at high temperatures, and ideally be encapsulated with Pollution Degree 3 (PD3) rating. Compliance with EMC standards for emissions and immunity must also be met, along with no-load power consumption limits. Suitable modules are available from RECOM with power ratings of 5W, 15W, and 25W in through-hole PCB mount format.

PCB-mount through-hole AC/DC modules are available from RECOM with 85-528VAC inputs to suit worldwide single-phase and three-phase line-to-neutral or line-to-line AC voltages at up to 480VAC plus tolerances.