Compact, three-phase, high input voltage AC/DC power supplies deliver up to 500W

Louise Smyth

ABSOPULSE Electronics’ HTP 300-F3 and HTP 500F-FXW series of compact, three-phase, high voltage input ac/dc power supplies deliver up to 300W and 500W output power respectively. The units operate from a 3-phase line input of either 400Vac (360-440Vac range) or 480Vac (430-530Vac range). They deliver a single output voltage of 24V, 48V, 125Vdc or custom. The 3-phase power supplies are suitable for a broad range of heavy-duty applications including factory automation, industrial machinery and equipment.

The industrial quality designs are verified for 5600Vdc input to output isolation. Other electronic protection includes inrush current limiting, reverse polarity protection, output current limiting with short-circuit protection and thermal shutdown with auto-resetting. The units comply with the requirements for EN/UL60950-1 and equivalent safety standards. EMI performance meets EN55022 Class A with wide margins, with Class B available on request.

The power supplies are ruggedised and the printed circuits are conformal coated for protection against humidity and airborne contaminants. Both designs are rated for operation over a 0°C to +50°C temperature range at full load with no derating required.

The 300W version is cooled by conduction and natural convection and has a total footprint of 132 x 64 x 300mm. The 500W design is cooled by high quality internal fans and measures 185 x 66 x 358 mm.