Fabric Over Silicone Gaskets

Schlegel Electronic Materials (SEM), a well-respected leader in the EMI Shielding industry, introduces Fabric over Silicone EMI Gaskets (FoS) for high temperature applications. FoS has been developed with a new flame retardant formulation providing EMI shielding gaskets with UL94-V0 grade (Underwriters Laboratories Inc.)

and Halogen Free according to IEC 61249-2-21 (<=900 ppm chlorine, <=900 ppm bromine and 1500 ppm max. halogens). Fabric over Silicone EMI gaskets provide low compression forces, low compression set and an operating temperature that can be up to 125℃ (257ºF). Combined with highly flexible SEM fabric NiCu-C12 or NiCu-C70, Fabric over Silicone gaskets still feature over 70 dB attenuation at 40 GHz (SEM Stripline method) making this product ideal for on-board shielding or high temperature environment. Fabric over Silicone is currently available for all the SEM rectangular profiles.

Fig 1. Contact Resistance and Compression Load Deflection Testing result of ED9 (1.5 x 5.0 mm) Gasket

Technical Specifications

CHARACTERISTIC

SPECIFICATIONS

TEST METHODS

Shielding

Effectiveness

96 dB average (20MHz-10GHz):NiCu-C70


97.4 dB average (20MHz-10GHz):NiCu-C12

MIL DTL 83528C

Compression Force

1.70 lbs/inch @ 40%*

SEM LP-3001

Contact Resistance

0.031 ohms-inch @ 40%*

SEM LP-3001

Compression Set

5 % (compressed 50% for 22 hrs at 70 °C) * *

ASTM D 3574

Compression
Range

30 - 70 %

Surface Resistance

<=0.066 Ohms/sq. : NiCu-C70


<=0.024 Ohms/sq. : NiCu-C12

ASTM F390

Contact Resistance
at 1Kg load

< 0.11 ohms-in < 0.08 ohms-in

SEM LP-3001

Operating Temperature

-40°C , +125°C

ASTM D3574

Abrasion Resistance

>= 1000 cycles: NiCu-C70

>=1000 cycles: NiCu-C12

ASTM D3884

Flame Retardant

UL94 V0

UL94 (Underwriters Laboratories, Inc)

Compliance

2015/863/EU (RoHS 2.0) Compliant REACH 151 SVHC Compliance

Halogen Content

<=900 ppm chlorine & <=900 ppm bromine & 1500 ppm max for both

IEC 61249-2-21 /EN 14852 B

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*Result is measured on the ED9 Resulted measured=> Result was measured ED9 (1.5 x 5.0 mm) profiles
**Result measured on the 5 mm x 25.4 mm silicone foam
The technical specification data is based on SEM tests and analysis that we believe to be reliable. However, in no event, shall SEM be liable for the inaccuracies or omissions contained therein. In all cases, details and values should be verified by the customer. 

Part Number Guideline
EXXSNMXXXXXHF
S: specifies Silicone foam.  N: speccifies the fabric type (3: NiCu-C70 Ripstop Fabric, 4: NiCu-C12 Plain Weave Fabric).
M: specifies the fishing/attachment system.
XXXXX: specifies length in the form XXX.XX”.

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