DSF & FSO Series

PCB mount baseplate cooled COTS DC EMC filters with active surge protection

Developed specifically for the defense and avionics market, the DSF100 & DSF200LV are single module EMC filter & surge protectors, whereas the DSF500 surge protector & FSO461 EMC filter must be used in combination to provide the same level of protection. These products offer a high end specification while offering the short lead times and cost benefits of COTS components.

Designed to provide active surge protection and EMC filtering for the conducted emissions of DC-DC converters, they also protect against the conducted susceptibility specified in MIL-STD-461G and for surges and spikes as specified in MIL-STD-1275A-E and MIL-STD-704A-F.


  • Up to 500W baseplate cooled
  • Up to 28A output current
  • Active surge protection & EMC filter (DSF100 & DSF200LV)
  • Active surge protection (DSF500) & EMC filter (FSO461)
  • Output voltage tracks input voltage & clamps >36VDC
  • Input range 10V to 33VDC (DSF)
  • Input range 0 to 100VDC (FSO)
  • Input transient ±250V for 70µs 2J
  • Overtemperature protection
  • Remote inhibit
  • MIL-STD-1275A MIL-STD-461 immunity
  • MIL-STD-704A DEF-STAN-61-5 Part 6 Issue 6 immunity
  • MIL-STD-461 & DEF-STAN-59-411 EMC emissions
  • MIL-STD-810G shock & vibration
  • -40°C to +100°C operating temperature (baseplate)
  • 3 Year Warranty
Image Model Name Rated Current Rated Voltage Mounting Filter Stages Datasheet Stock Check RFQ
DSF200LV 3 10 - 33 VDC Board Mount - Datasheet Stock RFQ
DSF100 3.7 10 - 33 VDC Board Mount - Datasheet Stock RFQ
DSF500 28 10 - 33 VDC Board Mount - Datasheet Stock RFQ
FSO461 28 0 - 100 VDC Board Mount - Datasheet Stock RFQ
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