Our Products Solve EMI Issues Fast

No Redesigns or Delays Required

EMI and RFI issues can bring development to a halt, often requiring costly redesigns and board spins, or extended lead times when sourcing and procuring new prototypes.

Quell’s EESeal® solutions help to eliminate these setbacks with instant, ruggedized filtering that installs directly into your existing connector with no hardware or layout changes.

EESeal® EMI filter inserts, gaskets, and transient voltage suppression (TVS) options address most EMI, RFI, ESD, and grounding challenges in a fraction of the time, cost, and physical space as traditional solutions.

Custom samples are designed and built in the U.S. and ship out in 1-2 days, helping engineers to reach compliance faster and keep mission-critical programs on track.

EMI Filter Inserts (EESeal®)

Primary Function: Instant/retrofit EMI and RFI suppression at the connector level using custom selected passive components tailored to your application.

Typical Use-Cases (Not Limited To):

  • Aerospace & Defense
  • Medical Electronics
  • Space Applications
  • Communications Systems

Compatible Connector Types (Not Limited To):

  • MIL-C-38999 / MIL-C-26482 / MIL-C-5015
  • D-Sub / Micro-D
  • ARINC, LEMO
  • Custom Connectors

Installation: Press-fit into connector cavity; no tools required.

EESeal+®

Primary Function: Custom connector insert that provides EMI filtering, transient protection, and grounding in high-frequency applications.

Typical Use-Cases (Not Limited To):

  • High-Frequency Applications (1–100GHz)
  • Embedded Systems
  • Mission-Critical Systems
  • Portable Equipment

Compatible Connector Types (Not Limited To):

  • MIL-C-38999 / MIL-C-26482 / MIL-C-5015
  • D-Sub
  • ARINC, LEMO
  • Custom Connectors

Installation: Press-fit into connector cavity; no tools required.

Transient and ESD Protection

Primary Function: Safeguard circuits from voltage spikes and electrostatic discharge (ESD)

Typical Use-Cases (Not Limited To):

  • Field Communication
  • High-Speed Data/Control Systems
  • I/O Lines
  • Aerospace & Defense
  • Space Applications

Compatible Connector Types (Not Limited To):

  • MIL-C-38999 / MIL-C- 26482 / MIL-C-5015
  • D-Sub / Micro-D
  • ARINC, LEMO
  • Custom Connectors
  • Custom I/O Plug-Ins

Installation: Press-fit into connector cavity; no tools required.

EMI Gaskets

Primary Function: Conductive or non-conductive gaskets that prevent EMI leaks from inside the connector; add a ground plane, selective pin-by-pin shorts or grounds, or just a simple gasket.

Typical Use-Cases (Not Limited To):

  • Enclosure Grounding and EMI Shielding
  • Panel-Mounted Instrumentation/Test Equipment

Compatible Connector Types (Not Limited To):

  • MIL-C-38999 / MIL-C-26482 / MIL-C-5015
  • D-Sub / Micro-D
  • Panel Mount / Circular
  • SOSA Connectors
  • Custom Form-Factors

Installation: Bonded via conductive adhesive or pressure fit.

Filtered Connector Solutions

Primary Function: EMI and transient protection solutions that are mounted in the rear of standard connectors.

Typical Use-Cases (Not Limited To):

  • EMC-Critical Applications
  • Military/Aerospace Equipment
  • Harsh Environment Systems
  • Industrial/Heavy Machinery
  • C-Filters and Pi-Filters

Compatible Connector Types (Not Limited To):

  • Custom-Built Connector Assemblies

Installation:  Integrated during cable assembly or connector build process. Note that custom assemblies may require longer lead times.

See Why Engineers Trust EESeal® in Over 14,000+ Applications

“Just over the phone, they identified what the problem was and made a solution for it. Quell was really incredible. Their expertise, their help, it was critical.”

Louis Gabriel
Blind Luck Racing

How it Works

The silicone elastomer body of EESeal® slides over a connector’s existing pin layout like a glove. Compression takes it from there: EESeals can change shape, adapt to misaligned pins, all while maintaining a snug environmental seal.

• 360º conductive silicone contact around each pin
• Multiple conductive silicone peripheral shell contacts
• Individual components and interconnections move as the body changes shape
• Body acts as conformal coat and electrical isolation for suspended components

EASY INSTALLATION INTO YOUR CONNECTOR

Request Your FREE Generic or Custom EESeal or EESeal+ Sample. We’ll Design, Build, and Ship in 24-48 Hours.