From RECOM: "385VDC Surge Protectors for Railway Converters"
The RSPxxx-168 are surge protector modules designed to protect railway DC/DC converters from excessive voltage surges of up to 385VDC. The output voltage tracks the input voltage up to 165VDC, thereafter the output voltage is clamped to prevent damage to the converter from input over-voltage conditions that cannot normally be filtered out. There are three options available: the RSP20-168 is suitable for up to 20W, the RSP150-168 for up to 150W and the RSP300-168 for up to 300W converters. To achieve compliancy with both the RIA12 and NF F 01-510 surge immunity specifications, these modules are simply connected in series with the input of the DC/DC converter. Samples and OEM pricing are available from all authorized distributors or directly from RECOM.
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