Found 6 alternatives for EMC-20 by CUI Inc.. Power Line Filter Modules — Tube.
DC-DC FILTER, EMC 0~80 VDC INPUT
AC-DC FILTER, 85~305 VAC INPUT,
LINE FILTER 75VDC 10A TH
20 WATT RIA12 SURGE FILTER, RAIL
300 WATT RIA12 SURGE FILTER, RAI
150 WATT RIA12 SURGE FILTER, RAI