Din Rail Mounted DC-DC converter
Voltage range should be between 23 to 42V
Output is 12V, 5A
Rated power >50W
The below compliance
Compliance to BS EN/EN45545-2 for fire protection or NFPA130 ;
Meet BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration,
BS EN/EN50121-3-2 for EMC
Nearest I can find is the combination of the TEP75-4812WI-CMF Railway qualified 12V 75W DC-DC converter and the TEP-MK1 DIN rail mounting kit for it.
It meets standards for EN50155 and EN45545-2. I could not find any info on whether it met EN50121-3-2, but it does specifically mention that it passes EN55011 class A and EN55032 class A for EMC.