Quietshield Gaskets & Shielding
flexible, conformable and
lightweight Quietshield™
products deliver effective
EMI shielding across seams
or gaps within an enclosure
Fabric-Over-Foam Gaskets
are low cost,
soft and easy to apply. These gaskets are
available in a variety of materials and
profiles, including rectangular, “D” shaped,
FL shaped and DD shaped…
FC68-FC69
Waved Metal and Fabric-Over-Foam
I/O Gaskets
are flat products used to
provide a ground contact between a
metal connector and the electronic
enclosure or mating connector…
FC70
Shielding Tapes and Fabrics
are flexible,
lightweight, and easy-to-install shielding
materials offering high conductivity with
a low electrical resistance and are
available in a variety of fabric styles…
FC71
Wire Mesh Gaskets
are available
as all mesh or elastomer core mesh
gaskets. They provide excellent heat
and corrosion resistance and are used
between two surfaces to maintain
electrical continuity while shielding
electromagnetic waves…
FC72
Conductive Silicone
is used for its heat
resistant properties and can be produced
in many different forms such as sheets,
molded parts, die-cuts or strips. These
conductive elastomers are water resistant,
can eliminate static electricity, and act
as an absorber at high frequencies…
FC73
™
FC65
Shielding Theory and Introduction
Shielding Theory
Electromagnetic shielding is used to prevent electromagnetic
signals such as radio signals from leaving or entering a box
or enclosure. Signals inadvertently emitted by an electronic
device can cause distortion or interruption in normal radio
communications in a localized area. This is the basis of
most laws and regulations concerning electromagnetic
interference. In addition, normal radio signals can cause
unprotected electronic devices to malfunction. Depending
on the device’s function, a malfunction in the device could
be a minor inconvenience such as static on a radio, or life
threatening such as the malfunction of a life support system
at a hospital.
The shield will continue to function as long as there are
no holes in the electromagnetic shield which would allow
the currents to flow from one side of the shield to the other.
Holes are a necessity in an electronic enclosure. Connectors,
wires, and cables are needed to transmit information to and
from electronic devices. Doors and covers are needed to
get access to components to maintenance, service, and
keypads may also be required. The problem is that all of
these items cause openings in the shield which reduce
the performance of the shield.
Special devices such as shielding gaskets, shielding
ventilation panels, shielded filtered connectors, and shielded
switches minimize the effect of a hole in the shield.
The length of the hole and wavelength of the signal
that needs to be shielded are the major factors determining
the shielding effectiveness of an electronic enclosure. The
distance between spotwelds, or screws which hold a metal
housing together count as long narrow holes. Higher frequencies
(lower wavelengths) flow more easily through smaller holes,
and so the highest frequency needed to be shielded is
the frequency of concern when designing shielding.
Aperture versus frequency charts can give a rough
estimate of the shielding effectiveness of a metallic
electronic housing.
Introduction
The electromagnetic shield in most cases is the electronic
housing itself. The housing/shield forms a metal cage around
the electronic circuits in a device. Most of the electromagnetic
signal is absorbed with a small portion (3 to 10 dB) of the
signal reflected off the metal housing. Most of the absorbed
signal creates alternating currents at radio frequencies
which travels on the surface of metal. This allows the
electromagnetic shield to keep signals from outside the
enclosure on the outside of the shield and signals from
inside signals on the inside of the shield.
100.
SHIELDING EFFECTIVENESS
40 dB
60 dB
20 dB
Wavelength
to
Frequency
80 dB
110
100
TYPICAL SHIELDING EFFECTIVENESS
Aperture Length (Wavelength - Inches)
10.
1.
.1
.01
.001
100 KHz
Shielding Effectiveness (dB)
100GHz
90
80
70
60
50
40
30
20
10
0
0
100
200
300
400
500
600
700
800
900
1000
1 MHz
10MHz
Frequency (MHz)
100MHz
1GHz
10GHz
Test Methods: ASTM D-4935-89
Test Fixture: Flanged coaxial transmission line
Frequency (MHz)
API TECHNOLOGIES
• 8061 Avonia Rd. • Fairview, PA 16415 • Ph: 814-474-1571 • Fax: 814-474-3110 • eis.apitech.com
API TECHNOLOGIES’ SPECTRUM CONTROL GmbH
• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
FC66
Quietshield
™
Part Number System
Example:
57
Gaskets
57D1211205 - 7200
The part number shown represents a gasket with woven foam made of neoprene, conductive PSA.
The gasket has copper-nickel plating that is 0.120" wide x 0.050" thick x 72" long.
D
1
2
1
12
05
-
7200
Material
Shapes/Styles
D, R, L, P, C, K, O, V, U —
Fabric-over-Foam
R, P, O, V — Mesh
A, D, H, J, P, O, P, Z —
Conductive Elastomer
F — Formed/Stamped
T — Tape/Foil/Fabric
S – Special
0 — None
1 — Foam neoprene, no PSA
2 — Foam neoprene,
conductive PSA
3 — Foam neoprene,
non-conductive PSA
4 — Solid
5 — Sponge
6 — Silicone
7 — Hollow silicone
8 — Conductive elastomer
9 — Hollow conductive elastomer
A — No core, conductive
PSA one side
B — No core, non-conductive
PSA one side
C — No core, conductive
PSA double side
D — No core, non-conductive
PSA double side
E — Monel mesh with silicone
sponge
F — Al wire with silicone sponge
G — No core, conductive, no PSA
H — Monel mesh solid
Z — Z-foam
Note: PSA = pressure sensitive adhesive
Length
Length (ex: -1205 = 12.05)
[Standard is 36 (-3600)]
Custom part number for
special application (-X001)
X must be the first character
Height/Thickness
Profiles — thickness in inches
I/O — height in inches
Fabric/Foil
0 — Non-woven
1 — Woven
2 — Woven Ripstop
3 — Woven DTY Filament
4 — Mesh
5 — Net
6 — Knit
7 — Aluminum Foil
8 — Copper Foil
9 — None
Width or Type & Size
Profiles — width in inches
I/O — first digit is I/O Type
(D, d-sub)
second digit is shell size
(1, 2, 3, 4, or 5)
Sample Kit
Quietshield sample kits are available
from API Technologies. Order number
KIT-QSHIELD-57.
Plating
0—
2—
4—
5—
6—
7—
9—
Copper - Nickel (std)
Copper - Nickel - Gold
Copper - Nickel - Resin
Copper - Nickel - P.S. Coating
Iron - Copper - Nickel
Copper - Nickel - Carbon
Ni - Graphite
API TECHNOLOGIES
• 8061 Avonia Rd. • Fairview, PA 16415 • Ph: 814-474-1571 • Fax: 814-474-3110 • eis.apitech.com
API TECHNOLOGIES’ SPECTRUM CONTROL GmbH
• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
FC67
Quietshield
™
Fabric-over-Foam Gaskets
Features
I
I
I
I
I
Maintain shielding effectiveness across seams or gaps
Shielding Effectiveness (SE) of 70 - 100 dB between
1 MHz to 18 GHz
Flexible and conformable
No creasing or tearing
Lightweight material
I/O Gaskets
API offers a complete line of standard and custom I/O
connector Electromagnetic Shielding Gaskets. I/O gaskets
are flat gaskets used to provide a ground contact between
a metal connector and the electronic enclosure or mating
connector. They ensure that the shield remains continuous
from the input/output cable to the electronic enclosure.
I/O Gaskets are available in the same materials
as the fabric-over-foam profile gaskets, or as all-metal
waved gaskets.
API’s line of metal waved gaskets is designed to
minimize the gaps between a D-Sub connector and
the panel it is mounted to. These gaskets ensure the
maximum “gap length” will not exceed the wave pitch,
0.200" (5.08 MM), even on surfaces with poor flatness.
This ensures maximum filter performance to 1GHz
and beyond.
Test
Performance
Profile Gaskets
Quietshield™ EMI/RFI Gaskets maintain shielding
effectiveness (SE) across a seam or gap in the electronic
equipment’s shielding material.
Quietshield gaskets provide unique solutions to your
most stringent shielding, grounding, ESD and packaging
requirements. It’s the cost-effective avenue for creativity
in design. These gaskets consist of polyurethane foam
combined with highly conductive fabrics. Specially
designed polyurethane foam is soft, resilient and
provides the perfect fit. Our gaskets are made with
seven different types of fabric plating and two types
of thermal adhesive, standard or flame retardant. Our
flame retardant adhesive complies with UL94VTM-1
and VTM-0. If necessary, the polyurethane foam core
can also be plated with Cu and Ni to provide
additional conductivity.
Fabric-over-Foam Gaskets, unlike elastomer or finger
strip gaskets, provide softness for easy application with
a variety of materials and designs at low cost. The best
quality with high conductivity, low electrical resistance
and minimum oxidation can be achieved by using
gold gaskets with additional gold plating to provide
superior shielding.
Profile gaskets are currently available in a variety of
shapes and lengths. API’s Spectrum Control line of gaskets
provide a variety of applications with lightweight and
flexible solutions. Various thicknesses and shapes are
available. These range from commonly used ones such
as rectangular and “D” shape, to uncommon ones such
as FL-shape (folding leaf) and DD-shape (Double DD-
shape). We are able to produce gaskets with different
shapes and sizes, based upon the customer’s requests.
The mounting style available for most profile gaskets
is pressure sensitive adhesive.These adhesives allow
simple place and press mounting on smooth and clean
metal surfaces.The parts can be cut to the desired length
with common scissors or ordered to the exact length
required. The adhesive provides high strength with
aggressive initial tack, which increases in strength
over time or after exposure to elevated temperatures.
Shielding Effectiveness*
Composition (STD)
Plating (STD)
Temperature Limit
Abrasion Resistance
Electric Resistance
Flamibility Rating**
Shelf Life***
68 dB - 88 dB
Woven
Copper and Nickel
200°C
Good
<0.08 Ohm
94VTM-1, V0 Grade
20 years
* Provides shielding effectiveness of 68 dB min. between 30 MHz
to 1 GHz, this will vary slightly depending on fabric type.
** Rubber rating only.
*** Fabric-over-foam gaskets.
API TECHNOLOGIES
• 8061 Avonia Rd. • Fairview, PA 16415 • Ph: 814-474-1571 • Fax: 814-474-3110 • eis.apitech.com
API TECHNOLOGIES’ SPECTRUM CONTROL GmbH
• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
FC68
Quietshield
™
Fabric-over-Foam
Profile Gaskets
Rectangular Type “R”
Flat Type “R”
W
H
Knife Edge Type “K”
H
W
0.492
0.500
0.500
0.752
H
0.138
0.094
0.098
0.252
W
D-Shape “D”
H
W
W
W
1.000
0.118
0.154
0.158
0.158
0.130
0.197
0.252
0.315
0.374
0.374
0.394
0.102
0.394
0.488
0.500
0.252
0.500
0.512
0.512
0.984
H
0.374
0.079
0.118
0.079
0.158
0.189
0.197
0.126
0.472
0.126
0.374
0.394
0.400
0.236
0.370
0.126
0.500
0.500
0.118
0.394
0.394
H
Part Number
57R121C037-xxxx
57R1211208-xxxx
57R1211512-xxxx
57R1211608-xxxx
57R1211616-xxxx
57R1211913-xxxx
57R1212020-xxxx
57R1212512-xxxx
57R1213247-xxxx
57R1213713-xxxx
57R1213737-xxxx
57R1213939-xxxx
57R1214012-xxxx
57R1214022-xxxx
57R1214937-xxxx
57R1215013-xxxx
57R1215025-xxxx
57R1215050-xxxx
57R1215112-xxxx
57R1215140-xxxx
57R1219839-xxxx
C-Fold Type “C”
H
W
W
0.118
0.158
0.158
0.158
0.158
0.197
0.197
0.197
0.197
0.197
0.236
0.236
0.276
0.276
0.276
0.276
0.276
0.299
0.315
0.315
0.354
0.394
0.394
0.394
0.394
0.472
0.472
0.512
0.512
0.512
0.551
H
P-Shape Type “P”
W
H
0.039
0.031
0.035
0.039
0.047
0.020
0.039
0.047
0.059
0.071
0.039
0.059
0.020
0.039
0.047
0.059
0.071
0.063
0.031
0.039
0.039
0.020
0.039
0.047
0.071
0.039
0.059
0.028
0.035
0.059
0.059
Part Number
57R1211204-xxxx
57R1211603-xxxx
57R1211604-xxxx
57R1211604-xxxx
57R1211605-xxxx
57R1212002-xxxx
57R1212004-xxxx
57R1212005-xxxx
57R1212006-xxxx
57R1212007-xxxx
57R1212404-xxxx
57R1212406-xxxx
57R1212802-xxxx
57R1212804-xxxx
57R1212805-xxxx
57R1212806-xxxx
57R1212807-xxxx
57R1213006-xxxx
57R1213203-xxxx
57R1213204-xxxx
57R1213604-xxxx
57R1214002-xxxx
57R1214004-xxxx
57R1214005-xxxx
57R1214007-xxxx
57R1214704-xxxx
57R1214706-xxxx
57R1215103-xxxx
57R1215104-xxxx
57R1215106-xxxx
57R1215506-xxxx
Double D-Shape “V”
H
W
Part Number
57K1214914-xxxx
57K1215009-xxxx
57K1215010-xxxx
57K1217525-xxxx
Folding Leaf Type “U”
W
H
W
H
Part Number
0.709 0.311 57U1217131-xxxx
W
H
Part Number
0.378 0.126 57V1213813-xxxx
Round Type “O”
W
0.295
0.315
0.394
0.421
0.681
H
0.138
0.315
0.394
0.386
0.591
Part Number
57L1213014-xxxx
57L1213232-xxxx
57L1213939-xxxx
57L1214339-xxxx
57L1216859-xxxx
W
H
Part Number
0.315 0.079 57P1213208-xxxx
0.520 0.130 57P1215216-xxxx
L-Shape Type “L”
H
W
0.430
0.433
0.551
0.578
H
0.395
0.433
0.591
0.673
W
Part Number
57L1214339-7200
57L1214343-7200
57L1215559-7200
57L1215767-7200
W
0.098
0.106
0.126
0.177
0.197
0.347
0.394
0.433
Part Number
57O1211010-xxxx
57O1211111-xxxx
57O1211313-xxxx
57O1211818-xxxx
57O1212020-xxxx
57O1213535-xxxx
57O1213939-xxxx
57O1214343-xxxx
W
W
0.090
0.091
0.102
0.118
0.118
0.150
0.150
0.158
0.197
0.236
0.236
0.236
0.236
0.252
0.256
0.256
0.315
0.354
0.354
0.374
0.386
0.394
0.394
0.394
0.394
0.394
0.394
0.394
0.394
0.433
0.433
0.433
0.709
0.709
0.709
H
0.091
0.126
0.126
0.079
0.138
0.059
0.118
0.157
0.197
0.079
0.177
0.197
0.217
0.118
0.134
0.197
0.394
0.118
0.126
0.236
0.252
0.157
0.177
0.197
0.217
0.236
0.276
0.295
0.394
0.138
0.177
0.217
0.551
0.787
0.906
Part Number
57D1210909-xxxx
57D1210912-xxxx
57D1211012-xxxx
57D1211208-xxxx
57D1211214-xxxx
57D1211506-xxxx
57D1211512-xxxx
57D1211616-xxxx
57D1212020-xxxx
57D1212408-xxxx
57D1212418-xxxx
57D1212420-xxxx
57D1212422-xxxx
57D1212512-xxxx
57D1212514-xxxx
57D1212520-xxxx
57D1213240-xxxx
57D1213512-xxxx
57D1213513-xxxx
57D1213725-xxxx
57D1213925-xxxx
57D1213916-xxxx
57D1213918-xxxx
57D1213920-xxxx
57D1213922-xxxx
57D1213924-xxxx
57D1213928-xxxx
57D1213930-xxxx
57D1213939-xxxx
57D1214314-xxxx
57D1214318-xxxx
57D1214322-xxxx
57D1217155-xxxx
57D1217177-xxxx
57D1217191-xxxx
Typical location and
position of tape
NOTE:
All dimensions in inches
API TECHNOLOGIES
• 8061 Avonia Rd. • Fairview, PA 16415 • Ph: 814-474-1571 • Fax: 814-474-3110 • eis.apitech.com
API TECHNOLOGIES’ SPECTRUM CONTROL GmbH
• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
FC69
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