Robert McKeown Company, Inc.
Robert McKeown Company, Inc.
111 Chambers Brook Road
Branchburg NJ 08876
Toll Free: 1.800.631.1125
Phone: 908.218.9000
Fax: 908.218.8949
Email: sales@robertmckeown.com
Website: www.robertmckeown.com
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The SOFT-SHIELD® 3500 fabric over foam (fof) product family are a group of low-closure force EMI/EMC gaskets. SS3500 offers a low cost competitive solution for EMI shielding and electrical grounding in sheer and compression.

The SS3500 product family is comprised of conductive fabric wrapped around open cell foam. This wrap around technology grounds the gasket from point to point, ultimately eliminating an EMI/EMC gap.

SS3500 typically requires less then 1lb/in (0.175/ mm) closure force, making it effective for low closure force applications. SS3500 takes less than 15% compression set. This is less than most other FOF’s on the market resulting in reliable/ repeatable shielding performance. SS3500 is an excellent alternative shielding solution to traditional spring finger type products.

The SS3500 product family is one of the most versatile EMI fof products offered to the market. Depending on mechanical and shielding requirements, the SS3500 can be made with different conductive jackets. Nickel-plated taffeta, Nickel-plated rip-stop polyester, halogen free nickel-plated rip-stop, etc. New geometric profiles are designed and released to the market on a regular basis. Profiles are engineered to optimize mechanical form fit and function while optimizing electrical performance. This technical data sheet will address the most common type FOF. Chomerics has to offer to market. Contact Chomerics for any other special design requirements and an updated profile list.

Product Features:
  • Low cost
  • > 100 (dB) shielding effectiveness 50 MHz to 10 GHz
  • Low closure force
  • Ultra-soft profiles that accommodate a wide range of tolerance gaps
  • Over 200 profiles available to the market
  • Readily available in bulk, cut to length or with cut features
  • ULV0
  • RoHS Compliant
  • REACH Compliant
  • Excellent low compression set properties
  • Abrasion/sheer resistant conductive jackets
  • Low contact resistance
Typical Applications:
  • Server Faceplates and blade cards
  • Panel seals
  • Cover seal
  • Door seals
  • Grounding tabs
  • EMI Window/vent seals
  • Improved ground paths
  • Low cost solutions are imperative
SOFT-SHIELD 3500 Low Closure Force EMI Strip Gaskets - C-Fold Profiles
Unit of Measure
1 2 3 

Item #

PSA Tape Backing

Profile Number

Height

Width

Shielding Effectiveness at 50 MHz to 10 GHz

35% Compression Deflection

77-1N-3803 N/A Halogen Green Taffeta, PSA and Extended Line N/A 3803 N/A 0.315 in8.0 mm N/A 0.315 in8.0 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1N-3806 N/A Halogen Green Taffeta, PSA and Extended Line N/A 3806 N/A 0.386 in9.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1N-3830 N/A Halogen Green Taffeta, PSA and Extended Line N/A 3830 N/A 0.465 in11.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1N-3831 N/A Halogen Green Taffeta, PSA and Extended Line N/A 3831 N/A 0.394 in10.0 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1N-3807 N/A Halogen Green Taffeta, PSA and Extended Line N/A 3807 N/A 0.673 in17.1 mm N/A 0.579 in14.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1P-3803 N/A Halogen Green Rip Stop, No PSA N/A 3803 N/A 0.315 in8.0 mm N/A 0.315 in8.0 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1P-3806 N/A Halogen Green Rip Stop, No PSA N/A 3806 N/A 0.386 in9.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1P-3830 N/A Halogen Green Rip Stop, No PSA N/A 3830 N/A 0.465 in11.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1P-3831 N/A Halogen Green Rip Stop, No PSA N/A 3831 N/A 0.394 in10.0 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1P-3807 N/A Halogen Green Rip Stop, No PSA N/A 3807 N/A 0.673 in17.1 mm N/A 0.579 in14.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1Q-3803 N/A Halogen Green Rip Stop, PSA Only (No Extended Liner) N/A 3803 N/A 0.315 in8.0 mm N/A 0.315 in8.0 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1Q-3806 N/A Halogen Green Rip Stop, PSA Only (No Extended Liner) N/A 3806 N/A 0.386 in9.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1Q-3830 N/A Halogen Green Rip Stop, PSA Only (No Extended Liner) N/A 3830 N/A 0.465 in11.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1Q-3831 N/A Halogen Green Rip Stop, PSA Only (No Extended Liner) N/A 3831 N/A 0.394 in10.0 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1Q-3807 N/A Halogen Green Rip Stop, PSA Only (No Extended Liner) N/A 3807 N/A 0.673 in17.1 mm N/A 0.579 in14.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1R-3803 N/A Halogen Green Rip Stop, PSA and Extended Liner N/A 3803 N/A 0.315 in8.0 mm N/A 0.315 in8.0 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1R-3806 N/A Halogen Green Rip Stop, PSA and Extended Liner N/A 3806 N/A 0.386 in9.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1R-3830 N/A Halogen Green Rip Stop, PSA and Extended Liner N/A 3830 N/A 0.465 in11.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1R-3831 N/A Halogen Green Rip Stop, PSA and Extended Liner N/A 3831 N/A 0.394 in10.0 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1R-3807 N/A Halogen Green Rip Stop, PSA and Extended Liner N/A 3807 N/A 0.673 in17.1 mm N/A 0.579 in14.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1H-3803 N/A RipStop fabric No PSA N/A 3803 N/A 0.315 in8.0 mm N/A 0.315 in8.0 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1H-3806 N/A RipStop fabric No PSA N/A 3806 N/A 0.386 in9.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1H-3830 N/A RipStop fabric No PSA N/A 3830 N/A 0.465 in11.8 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1H-3831 N/A RipStop fabric No PSA N/A 3831 N/A 0.394 in10.0 mm N/A 0.421 in10.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
77-1H-3807 N/A RipStop fabric No PSA N/A 3807 N/A 0.673 in17.1 mm N/A 0.579 in14.7 mm N/A > 100 dB N/A < 1 lb/in< 0.175 N/mm
Unit of Measure
1 2 3