SynQor has developed the ruggedized RailQor product line for the harsh environments associated with railway transportation electronics. The European standard EN 50155 specifies the required input voltage ranges and input transients for this industry. The RailQor converters are designed to meet or exceed those requirements. Since some equipment is being designed to also comply with RIA-12 surges and transients, those requirements are discussed here as well, along with the supplemental circuitry needed to meet those requirements.
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