Recom has added the RSP-168 surge protectors to their portfolio, which allow DC/DC converters to meet both RIA12 and NF F 01-510 surge immunity specifications for railway applications. 

Three versions cover a range of railway certified DC/DC converters from 20W up to 240W. 

The modules are 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 can be connected in series with the input of the DC/DC converter.