EMI Filter Connector Inserts

All the Benefits of a Bulky Filtered Connector in a Slim, Cost-Effective, Custom EMI Filter Insert

Each EESeal® insert is custom-designed to your specifications. The EESeal’s conductive silicone rubber fits over connector pins like a glove; based on your unique project requirements, we can treat each pin uniquely with capacitors, resistors, MOVs, and other electronic components.

EMI filter insert
Rapid prototyping and split-second installation tackle EMI/RFI problems pronto—all in an insert weighing under one gram.

READY TO SOLVE YOUR EMI CHALLENGE?

Choose the path that best fits where you are today.

I need help determining
the right solution

Generate a validated configuration based on your connector and filtering requirements.

I already know
the solution I need

Request a sample for evaluation or validation.

Solve EMI/EMC problems in all connector types:

  • D-Sub
  • Circular
  • MDM
  • Micro-D
  • MIL-C-38999
  • MIL-C-26482
  • MIL-C-5015
  • MIL-C-83723
  • ARINC
  • Lemo
  • Or any custom design, too!

Meet or exceed requirements of common specs and standards:

  • MIL-STD-461
  • MIL-STD-1344 shock, vibration, salt spray, durability, fluid immersion, porosity
  • RTCA/DO-160 thermal cycling, humidity
  • MIL-STD-5400 temperature/altitude
  • NASA outgassing

Under Pressure to Correct a Failed EMI Compliance Test?

The EESeal® offers a fast, effective, permanent solution for unexpected compliance testing setbacks — no return lab visit or redesigns necessary.

Explore the EMI Insert Advantage

Available in 3 Varieties

EESeal®

The original, tried-and-true EMI filter insert that adds custom circuitry to any standard connector in seconds, including EMI filtering, ESD/transient protection, resistors, and shorts.

  • Provides attenuation from 10 kHz up to 40 GHz with up to 40–45 dB peak
  • Customizable per pin (capacitors, resistors, MOVs, diodes, and more)
  • Preserves environmental seal with silicone elastomer design
  • Rugged construction tested to MIL-STD and DO-160 requirements

EESeal+®

Builds on EESeal’s proven technology and applies an exceedingly high dielectric constant silicone construction to achieve enhanced filtering for demanding high frequency requirements.

  • Provides filtering up to 100GHz and attenuation of peak frequencies up to 50dB
  • High dielectric constant silicone creates a small (2-6pF) capacitor with virtually no inductance
  • Lowers contact resistance
  • Retains EESeal’s custom pin-level treatment, rapid installation, and rugged resilience advantages

Filter Connector Solutions

Behind-panel, PCB-mounted connectors with built-in EMI/transient filtering.

  • Built using off-the-shelf PCB connector components mounted in the rear
  • Employ the same innovative packaging technology as the EESeal and EESeal+ for pin-by-pin design flexibility
  • Available in a wide range of noise mitigation options

Before & After: See How an EMI Filter Insert Fixes MIL-STD-461 Radiated Emissions Problems

During testing, this connector demonstrated high EMI levels, with several surges above the spec level. An EESeal® corrected the issue instantly, earning a passing grade.

EESeal EMI Filter Fixes MIL-STD-461 Radiated Emissions Problems; Graph showing effectiveness of EESeal

Typical EESeal® Attenuation

Single Capacitor – Pin to Shell

Typical attenuation of a range of capacitors used in an EESeal.
Other capacitor values are also available. This includes Commercial grade, HiRel, Space, etc.

Typical attenuation of a range of capacitors used in an EESeal+ device including both discrete and integral capacitors. Integral capacitors are made using conductive silicone and a dielectric to achieve capacitance in the 2-6pF range.

In this example the target frequencies were from 50-200MHz with a peak outage at 80MHz.  Due to the differences in inductance between an EESeal and the EESeal+, a different capacitor value must be used. As you can see, the EESeal+ offers ~10dB of additional attenuation up and down the curve over the standard EESeal for this application.

Using the same capacitor in any EMI filter does not always give you the same performance. The attenuation using a discrete 4pF capacitor in an EESeal vs. the EESeal+ are very different. Integral capacitors can be used in the EESeal+ which have virtually zero inductance allowing for noise mitigation in the 10-100GHz range.

Examples of EESeal® EMI Filter Insert MIL-STD-461 Test Results

READY TO SOLVE YOUR EMI CHALLENGE?

Choose the path that best fits where you are today.

I need help determining
the right solution

Generate a validated configuration based on your connector and filtering requirements.

I already know
the solution I need

Request a sample for evaluation or validation.