Brick DC-DC converter designed for railways offers wide input range

Components Bureau now offer the new DC-DC converters AER20-W and AER20-DW from Autronic.

The compact 20W power supply is created for harsh applications and ideal for the railway with an input range of 18:1. The new edition of the series is galvanically isolated DC-DC converters with 20W power in a sealed housing. The 2" x 1" bricks have been especially created as reliable solutions for applications such as railway systems, battery-powered equipment, measuring instruments, displays and many other applications with harsh requirements.

The key unique feature is the input range from 8.5V up to 160V in a single device. This provides the nominal input range of 12...110V, including tolerances (-30% and + 45%) to be covered with only one device and aids the design-in of the power supply. The AER20-W provides high efficiency up to 88% with the option of a heat sink, securing even better heat dissipation for higher thermal needs.

The small power supplies are created for usage in the temperature range from -40C to 85C (case up to 105C). With natural convection, the converter can be operated up to 67C with no derating. The voltage converters have multiple protective functions combined, such as protection against overcurrent, overvoltage, and the DC-DC converters are also short-circuit-proof and have a low no-load current consumption. The power supply can be controlled through remote ON/OFF. Further features are a high I/O isolation with 3000VAC with reinforced isolation.

The device satisfies the environmental demands of shock/vibration according to EN 61373 category 1 class B, dry and wet heat according to EN 60068-2-1, 2, 30 and the EMC standard EN 50121-3-2 for rail vehicles(with external filtering components), as well as the railway standard EN 50155. Fire tests, according to EN45545-2, have been performed successfully. Versions for the nominal railway voltages of 24...110 are available.