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Trust Daburn Electronics and Polytron Devices for your DC-DC converter power supplies needs. You will benefit from 50 years of power supply experience. Nearly all of our power supplies are UL approved. We are also an ISO 9001 and AS9100 quality system certified supplier. Our robust DC-DC converters are used in transportation and railway applications. Customers have come to us after discovering that most converters offered in the industry aren't compliant with transportation industry code. Our 12-, 24- and 110-volt input DC-DC converters are a reliable option for many transportation and railway machinery.Applications