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Filtered Circular Connectors

APITech offers a premium line of custom filtered circular connectors completely intermateable with MIL-DTL-38999 Series III. These custom, high-reliability, connectors have a proven reputation for superior quality and performance.

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

  • Available in two plate lengths, .990" and 1.240"
  • Available in both C and Pi filter circuits
  • Eliminates mounting hardware and prep work
  • Wall mount, jam nut, and straight plug options
  • Fully qualified test laboratory and is willing to provide additional acceptance testing upon customer's request, at minimal additional costs
  • Commercial and defense aerospace
  • Satellites
  • Telecommunications and security
  • Power supplies
  • Electronic warfare
  • Ground and air weapon systems
  • Mining and oil exploration
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.