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Transient Suppression EMI Filters

This series of panel mount EMI filters feature Pi filters with a transient suppressor at the input of the filter. They supply high-frequency performance with added protection to safeguard the circuits from voltage spikes on the line.  

These EMI filters also ensure maximum reliability of equipment without interfering with data transmission, while maintaining signal quality even at high transmission frequencies.

APITech also offers a line of Transient Survival EMI Filter Circular Connectors and EMP/HEMP Filters designed to protect sensitive electronics equipment during hazardous transient conditions. 

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Transient Suppression EMI Filter Features

  • Popular .375", .410" and .690" case diameters
  • Voltage ratings from 50 VDC to 400 VDC/240 VAC, 400 Hz
  • MIL-PRF-15733, DSCC 84084, and MIL-PRF-28861 QPL EMI filters available
  • Impervious to high moisture environments, solvents, and severe environmental conditions
  • High-temperature terminal construction
  • D-slotted bushings
  • High-reliability EMC testing available

Transient Suppression EMI Filter Applications

  • Defense
  • Telecommunications
  • Aerospace
  • Power supplies
  • DC motors
  • Industrial control systems
  • Transceivers

Transient Suppression EMI Filter Part Numbers

Part Number Volt VDC I Amp Min Cap µF DCR Min mOhm MAX RDC Ohm Transient Suppressor Minimum Insertion Loss (dB)
VR VDC BV VDC IT MA IPP A 30 KHz 300 KHz 1 MHz 10 MHz 100 MHz 1 GHz
51-570-300 5 0.5 1.4 0.50 0.600 6.5 7.22/7.98 10 44.7 23 57 70 70 70 70
51-570-301 5 1.0 1.4 0.50 0.350 6.5 7.22/7.98 10 44.7 3 47 70 70 70 70
51-570-302 5 3.0 1.4 0.50 0.060 6.5 7.22/7.98 10 44.7 - 23 58 70 70 70
51-570-303 5 5.0 1.4 0.50 0.015 6.5 7.22/7.98 10 44.7 - 17 48 70 70 70
51-570-304 5 10.0 1.4 0.50 0.005 6.5 7.22/7.98 10 44.7 16 26 35 40 40 70
51-570-310 28 0.5 1.4 30.0 0.600 33.0 36.7/40.6 1 9.4 23 57 70 70 70 70
51-570-311 28 1.0 1.4 30.0 0.350 33.0 36.7/40.6 1 9.4 3 47 70 70 70 70
51-570-312 28 3.0 1.4 30.0 0.060 33.0 36.7/40.6 1 9.4 - 23 58 70 70 70
51-570-313 28 5.0 1.4 30.0 0.015 33.0 36.7/40.6 1 9.4 - 17 48 70 70 70
51-570-314 28 10.0 1.4 30.0 0.005 33.0 36.7/40.6 1 9.4 16 26 35 40 40 70
51-570-320 50 0.5 1.4 50.0 0.600 58.0 64.4/71.2 1 5.3 23 57 70 70 70 70
51-570-321 50 1.0 1.4 50.0 0.350 58.0 64.4/71.2 1 5.3 3 47 70 70 70 70
51-570-322 50 3.0 1.4 50.0 0.060 58.0 64.4/71.2 1 5.3 - 23 58 70 70 70
51-570-323 50 5.0 1.4 50.0 0.015 58.0 64.4/71.2 1 5.3 - 17 48 70 70 70
51-570-324 50 10.0 1.4 50.0 0.005 58.0 64.4/71.2   5.3 16 26 35 40 40 40
*VR=Reverse standoff voltage; BV=Breakdown voltage; IPP=Max. peak pulse current; IT=Test current