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Filtered Circular Connectors

APITech offers custom circular connectors in EMI filtered or unfiltered styles, including military standards. Our filtered compact shell connectors provide an effective filtering device that reduces the amount of real estate required within a product enclosure. Using our expertise in EMI filter design and manufacturing, we offer planar-style filtered arrays, available in C and Pi circuits up to 200nF in most configurations. Other filter circuits including transient protection are available.

APITech’s filtered EMI connector offerings are fully vertically integrated and manufactured in the USA. Components including capacitors and shells are manufactured by our State College, PA facility, providing our customers with high-quality parts at very competitive prices, with the industry’s shortest lead times.

  • Soldered construction for better high-frequency performance over mechanical designs

  • Large planar capacitance pin-to-pin ratio range to provide power and signal filtering in a single package

  • Insulated and ground line options

  • Predictable line-to-line isolation for segregated line IL performance

  • Stainless steel, aluminum, composite shells for environmental and weight-sensitive applications

  • Cadmium, nickel, black nickel-zinc plating available for Military and RoHS environments

  • Vertically integrated shells and ceramics providing shorter lead times

  • AC and lightning withstand designs for transient environments

  • Components including capacitors and shells are manufactured by State College, PA USA facility

  • Commercial and defense aerospace
  • Power distribution
  • Military ground and air weapon systems
  • Power supplies
  • UAVs
  • Radar systems
  • Ground communications
  • Military vehicles
  • Aircraft electrical systems
  • Handheld and vehicular base VHF radios
  • Engine control systems
  • Secure digital intercommunication control systems

Operating Temperature -55°C to 125°C
Capacitance See capacitance table below
Capacitance Tolerance ±25%, +100%
Voltage Rating 200VDC
Dielectric Withstanding Voltage 500VDC
Dissipation Factor <3.5%
Insulation Resistance 1000MΩ, µF or 10KMΩ

Note: The electrical properties listed are typical and can be exceeded based on customer requirements and mechanical figuration. Since many variables affect the design, contact an engineer directly for a detailed assessment of your connector needs.

Capacitance Code Capacitance Value Circuit Availability
251 250 pF C
501 500 pF C, Pi
102 1,000 pF Pi
122 1,250 pF C
252 2,500 pF C, Pi
502 5,000 pF C, Pi
103 10,000 pF C, Pi
203 20,000 pF Pi
253 25,000 pF C
503 50,000 pF Pi

Note: Custom capacitance values and tolerances available.