The MTM Power DIN rail module HSA50 has been designed as a universal compact power supply for the use under rough environmental conditions. Further to the proven standard features, this module offers additional technical optimizations for the use in switching cabinets. The case design enlarges the heat dissipating surface of the power supply and in combination with the high efficiency leads to an optimized heat emission. Thus, the device remains cool even with higher ambient temperatures and provides therefore a high reliability. In case of overload, a regulation concept has been used which ensures a safe start even under most difficult load cases. The regulation allows a maximum over current of up to 1.6 times of the nominal current with decreasing output voltage. By this bent U-I-characteristic curve it is guaranteed that the device is not too strongly stressed thermally in case of overload and that even with regularly occurring overloads the life time is not reduced. As a standard, the output voltage is monitored by a power good signal. The module can optionally be delivered with parallel and redundancy operation. This option is also certified acc. to the a. m. standards.