The DS2x0-xxDC surge protector is designed to protect equipment
connected to DC power supply (or AC) against lightning surges.
These devices are based on high energy varistors (MOV) matched
with the DC operating voltage (from 12 to 350 Vdc). The MOV are
equipped with internal thermal disconnectors in order to provide
safe end of life.
UL1449 4th Edition - DC Rated SPDs