For railway applications needing to conform to the RIA12 and NF F 01-150 specifications for over-voltage transients, RECOM has developed a range of surge protection modules for PCB mounting. The RSPxxx-168 series are designed to be inserted before the EMI filter stage so that both the filter components and the DC/DC converters are immune to high energy over-voltage surges.
There are three versions with 20W, 150W or 300W continuous power rating. The surge protector output tracks the supply voltage in the range of 40 to 165VDC (pass-through), but then clamps the output voltage to 168VDC even if the supply voltage surges up to 385VDC. Thus, the RSPxxx-168 modules clamp any over-voltages to a safe value in order to protect the power module from being damaged. According to RIA12, the DC/DC module should keep working during input surge events.
There are three versions with 20W, 150W or 300W continuous power rating. The surge protector output tracks the supply voltage in the range of 40 to 165VDC (pass-through), but then clamps the output voltage to 168VDC even if the supply voltage surges up to 385VDC. Thus, the RSPxxx-168 modules clamp any over-voltages to a safe value in order to protect the power module from being damaged. According to RIA12, the DC/DC module should keep working during input surge events.
