EMI/EMP Filter Connector Products
 
 
Amphenol EMI/EMP Protection connectors offer the versatility of standard connectors, but with EMI/EMP protection for sensitive circuits. Internal housing of the EMI/EMP devices eliminates costly and bulky exterior discrete protection devices.

Available in many sizes, styles, and arrangements, Amphenol filter connectors are inter-mountable and inter-mateable with the following Mil-Spec Connectors:


  • MIL-C-38999
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  • MIL-C-28840
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  • MIL-C-26482
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  • MIL-C-27599
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  • MIL-C-24308
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  • MIL-C-83723
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  • MIL-C-26500
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  • MIL-C-5015
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  • ARINC 404
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  • ARINC 600
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    EMI Filter Connectors
     
    The Amphenol EMI filter connector utilizes two manufacturing technologies to provide the user with the most cost effective performance accross the frequency range. The tubular capacitor design offers over 30 years of proven field reliability. All filter contacts within the connector share a common ground plane, which is connected to the connector shell. The pin-to-pin isolation is 85 dB minimum at 100 MHz. The planar capacitor design joins pins to a multi-layered ceramic forming an array sub-assembly, with a peripheral ground, which is connected to the connector shell via a ground spring. Pin-to-pin capacitance can be as little as 10pf with a pin-to-pin isolation of 60 dB minimum at 100 MHz.
     
    Amphenol EMI filter connectors can be packaged with a Pi, C, L, LL, LC or T passive element network. These networks are comprised of the appropriate combination of ferrite inductors and ceramic capacitors. Most connectors are encapsulated in an oven-cured epoxy to provide:

  • Mechanical and thermal insulation of the ceramic elements - mechanical loading can be accomplished without capacitor damage. Pins can be bent 90 degrees and straightened with no damage to the filter.

  • Hermeticity (4.6 x 10-3 cc/sec) - prevents water from entering through the rear of the connector in high humidity environments.
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    EMI Filter connectors are intended for use in temperatures from -55 to 125 degrees Celsius. Attenuation will change with feed-through current and temperature.
     
    It is suggested that system requirements are analyzed for EMI protection in the following areas:
  • Working Voltage
  • Peak Voltage
  • Desired attenuation at a given frequency level
  • Any special capacitance limitations
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    Connector Options/Features:
  • Plug shells with grounding fingers for shielding against external EMI
  • Filter adapters eliminate replacement of either existing mated pair. Adapter is coupled between mating faces
  • Amphenol UTS (Universal Termination System) allows crimp termination. Uses crimp insertable socket contacts on conductor wires. Sockets mate with filter pins within the connector body. (Socket type M39029/57)
  • Filter contacts can withstand voltage spikes as high as 1500 volts (standard design is 600 volts) with special conformal coating on capacitor margins. Design can be increased to 2000 V on special order. These Amphenol filter connectors meet the levels and waveforms of SAE4L without failure.
  • Filter contacts with 7 amps RF current capability. Standard product will meet 3 amps RF current from -55 C through +125 C.
  • Receptacle shell modifications that allow mounting directly to a PC board, flex or header. Offers improved reliability by eliminating external spacers and washers. Other special shell features are also available upon request.
  • EMI/Hermetic connectors:
    The hermetic filter connector provides all the benefits of a hermetic connector, plus EMI protection for sensitive circuits. A fused glass insert within a unique shell housing protects the filter assembly. This design provides the capability to tolerate high level static pressure while maintaining a low level leakage rate.
  • Composite shell filter connectors that meet the MIL-C-38999, Series III dimensional length are available. The composite Tri-Start connector offers a lightweight, corrosion resistant, durable connector with the same high performance features as its metal counterpart. The composite filter connector utilizes planar technology to accommodate VHF-1 electrical performance characteristics.
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    Contact Options
  • Coaxial or concentric twinax contacts can be included in arrangements of filtered contacts for signal or power circuits.
  • Filter contacts with differing cutoff frequencies can be mixed in any given insert arrangement
  • Insulated feed-through contacts and ground pins can be included selectively for specific needs
  • Thermocouple contacts
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    Methods of Wire Termination:
  • Solder-wire termination
  • PCB termination
  • Solderless wrap
  • UTS (Universal Termination System) Crimp
  • Weld terminal for thermocouple contacts
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    To complete the Amphenol Filter EMI checksheet click here
     
     
    EMP Filter Connectors
     
    Amphenol EMP suppression connectors are available with either Metal Oxide Varistor (MOV) devices or diodes. The MOV connectors are provided with an array device having clamping voltages ranging from 22 volts to 47 volts. The diode connectors are provided with diode devices that are contact mounted, and are bi-polar or uni-polar with clamping voltages ranging from 7.0 volts to 200 volts. Both methods of EMP protection can be packaged together and/or along with EMI filter devices.
     
    To complete the Amphenol Filter EMP checksheet click here
     
    To view Filter Connector catalogs click here
    To view Filter Design Guide click here
    To view How to Specify a Filter Connector click here