Mesh Over Elastomer

Series No. 1500

MAJR’s Mesh Over Elastomer EMI Gaskets offer the shielding effectiveness that can be expected from metal knitted mesh gasket while simultaneously allowing for compression in a way that isn’t found with a typical all-mesh shielding gasket. A variety of material combinations are available to choose from depending on what sort of compression and shielding characteristics your specific application requires.

MAJR provides the choice between our standard rectangular, round, round with fin, or hollow configuration to ensure that enclosures or other equipment will be RF sealed appropriately.

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Category: EMI Shielding Gaskets & Tapes

Overview

Wire Mesh Over Elastomer Core EMI Gaskets (1500 series) is a great choice in lower cost effective EMI/RFI shielding and environmental protection. With two covers of mesh over an elastomer, the elastomer under pressure protrudes through the mesh to give sealing protection.

To address galvanic concerns MAJR’s shielded wire mesh gaskets are provided in a variety of material compositions allowing our customers to select the most appropriate material in their application – ensuring high attenuation over time in the systems they’re installed.

Product Features:

Excellent Attenuation & Compression: The MAJR Mesh Over Elastomer shielding strip gives a high degree of attenuation in the H-Field and E-Field, as well as on the plane wave. The attenuation varies from over 95-100 dB in the E-Field to 35-85 dB in the H-Field while still providing excellent compression because of it’s elasotmer core.
Versatility of Mounting Methods: Designers have the options of using a groove design for holding the mesh over rubber strip or using the mesh fin as a convenient way of strip mounting.
Wide Range of Materials: The designer can choose from a wide range of materials to satisfy EMI shieldmesh requirements while providing for corrosion protection and sealing criteria. See Table 2 for materials.

Custom Product

Technical Information

Shielding Effectiveness vs Frequency — Table 6

Field	Material Code -02-04 (MONEL) Frequency
Field	10 kHz	100 kHz	1 MHz	18 MHz	100 MHz	400 MHz	1 GHz	10 GHz
H	35	45	65	—	—	—	—	—
E	—	—	—	95	—	—	—	—
PW	—	—	—	—	95	85	75	65

Field	Material Code -10-12 (FERROUS/Tin-Steel) Frequency
Field	10 kHz	100 kHz	1 MHz	18 MHz	100 MHz	400 MHz	1 GHz	10 GHz
H	45	60	85	—	—	—	—	—
E	—	—	—	100	—	—	—	—
PW	—	—	—	—	95	85	80	70

Pressure vs Height Deflection — Figure 1

Strip Shape	h
KNIT WIRE AVAILABLE	MONEL ALUMINUM SILVER-BRASS TIN-FERROUS	YES YES YES YES	YES YES YES YES	YES YES YES YES	YES YES YES YES	YES YES YES YES	YES YES YES YES
ELASTOMER CORE AVAILABLE	NEO-SPONGE NEOSOLID SIL.SPONGE SIL.SOLID	YES YES YES YES	NO YES NO YES	YES YES YES YES	NO YES NO YES	YES YES YES YES	NO YES NO YES
EMI RATING	10 kHz H-FIELD 18 MHz E-FIELD 1 GHz PLANE WAVE	25 to 35 dB 95 to 115 dB 75 to 100 dB	25 to 35 dB 95 to 115 dB 75 to 100 dB	25 to 35 dB 95 to 115 dB 75 to 100 dB	25 to 35 dB 95 to 115 dB 75 to 100 dB	25 to 35 dB 95 to 115 dB 75 to 100 dB	25 to 35 dB 95 to 115 dB 75 to 100 dB
ENVIRONMENTAL SEAL	DUST RAIN & DRIP PROOF	GOOD	GOOD	GOOD	GOOD	GOOD	GOOD
PRESSURE SEAL	30 PSI UP	FAIR	FAIR	FAIR	FAIR	FAIR	FAIR
MOUNTING METHOD	GROOVE ADHESIVE BOLT	EXCELLENT GOOD GOOD	EXCELLENT GOOD FAIR	EXCELLENT FAIR —	EXCELLENT FAIR —	— EXCELLENT EXCELLENT	— EXCELLENT EXCELLENT
MINIMUM PRESSURE	—	15 PSI	15 PSI	5 PSI	5 PSI	5 PSI	5 PSI
MOUNTING	GROOVE COMP. STOP	YES YES	YES YES	YES NO	YES NO	YES NO	NO YES
GROOVE DEPTH OR COMP-RESSION HEIGHT	STRIP HT. 06 -0.25” .25 – .50” .50- 1.0”	85% of HT 80% of HT 75% of HT	85% of HT 80% of HT 75% of HT	75% of HT 75% of HT 70% of HT	75% of HT 75% of HT 70% of HT	75% of HT 75% of HT 70% of HT	75% of HT 75% of HT 70% of HT
TEMP. RANGE	SIL. SOLID SIL. SPONGE NEO. SOL NEO. SPONGE	-80 to 425°F -103 to 400°F -65 to 212°F -40 to 150°F	-80 to 425°F -103 to 400°F -65 to 212°F -40 to 150°F	-80 to 425°F -103 to 40°F -65 to 212°F -40 to 150°F	-80 to 425°F -103 to 400°F -65 to 212°F -40 to 150°F	-80 to 425°F -103 to 400°F -65 to 212°F -40 to 150°F	-80 to 425°F -103 to 400°F -65 to 212°F -40 to 150°F

Mesh Over Elastomer

Series No. 1500

Overview

Product Features:

Custom Product

Technical Information

Shielding Effectiveness vs Frequency — Table 6

Field

H

E

PW

Field

H

E

PW

Pressure vs Height Deflection — Figure 1

Material Selection Guide — Table 7

Product Data Sheet

Product Options