RP100 Compact Medical-Grade Single Stage Filters Astrodyne TDI RP100 Compact Medical-Grade Single Stage Filters are single-phase power line filters available in 3A, 6A, and 10A current ratings. The RP100 filters offer 120/250VAC (maximum) operating voltage and 50/60Hz operating frequency. These RP100 power line filters are ideal for medical and general-purpose applications.