POLA-H® Composite Gasketing0 pages

US Headquarters TEL +(1) 781-935-4850 FAX +(1) 781-933-4318 • www.chomerics.com
Europe TEL +(44) 1628 404000 FAX +(44) 1628 404090
Asia Pacific TEL +(852) 2 428 8008 FAX +(852) 2 423 8253
South America TEL +(55) 11 3917 1099 FAX +(55) 11 3917 0817
POLA-H® is a composite EMI shielding and weather seal gasket strip designed for low
frequency H (magnetic) field shielding, but providing outstanding E (electric) field and
plain wave shielding as well.
The material consists of continuous solid copper conductive paths (ASTM-B-545) in a solid
silicone pressure seal. Protruding tips of copper are plated with tin alloy (ASTM-D-152) for
low contact resistance (high contact conductivity) at mating surfaces, a primary factor in
achieving effective H field shielding.
POLA-H gasketing is normally supplied in strip form in 3 ft. (99.44cm) lengths (for longer
applications 3 ft. lengths can be bonded together), in widths from 0.125” (3.18mm) to 0.625”
(15.88mm), and in seven standard heights from 0.125” (3.18mm) to 0.500” (12.7mm).
Custom fabricated gaskets also can be supplied to customer specifications.
POLA-H® Composite
Gasketing
Width
Height Part Number
0.125 ± 0.015 0.188 ± 0.015 0.250 ± 0.015 0.312 ± 0.031 0.375 ± 0.031 0.500 ± 0.031 0.625 ± 0.031
(3.18 ± 0.38) (4.78 ± 0.38) (6.35 ± 0.38) (7.92 ± 0.79) (9.53 ± 0.79) (12.70 ± 0.79) (15.88 ± 0.79)
0.125 ± 0.015
(3.18 ± 0.25) 07-5123-0404 07-5123-0604 07-5123-0804 07-5123-1004 07-5123-1204 07-5123-1604 07-5123-2004
0.156 ± 0.010
(3.96 ± 0.25) 07-5123-0405 07-5123-0605 07-5123-0805 07-5123-1005 07-5123-1205 07-5123-1605 07-5123-2005
0.188 ± 0.010
(4.78 ± 0.25) 07-5123-0406 07-5123-0606 07-5123-0806 07-5123-1006 07-5123-1206 07-5123-1606 07-5123-2006
0.250 ± 0.010
(6.35 ± 0.25) 07-5123-0408 07-5123-0608 07-5123-0808 07-5123-1008 07-5123-1208 07-5123-1608 07-5123-2008
0.312 ± 0.015
(7.92 ± 0.38) 07-5123-0410 07-5123-0610 07-5123-0810 07-5123-1010 07-5123-1210 07-5123-1610 07-5123-2010
0.375 ± 0.015
(9.53 ± 0.38) 07-5123-0412 07-5123-0612 07-5123-0812 07-5123-1012 07-5123-1212 07-5123-1612 07-5123-2012
0.500 + 0.031
- 0.015 07-5123-0416 07-5123-0616 07-5123-0816 07-5123-1016 07-5123-1216 07-5123-1616 07-5123-2016
(12.70 + 0.079)
- 0.038)
Dimensions 0-12 12-24 24-36
(0-304.8cm) (304.8-609.6cm) (609.6-914.4cm)
A,B ± 0.03 (0.76) ± 0.06 (1.52) ± 0.12 (3.05)
C See Table 1
D ± 0.01 (0.25) ± 0.01 (0.25) ± 0.01 (0.25)
E,F,G,H,J,K ± 0.02 (0.51) ± 0.04 (1.02) ± 0.06 (1.52)
L ± 0.01 (0.25) ± 0.01 (0.25) ± 0.01 (0.25)
T Height or Thickness of Bulk Strip (See Table 1)
SPECIALLY
COATED
TIN-ALLOY
CONTACT POINTS
CONTINUOUS
COPPER
CONTINUOUS
CONTINUOUS COPPER
SOLID COPPER
TIN PLATED
SILICONE
NO POSSIBLE
ELECTRICAL PATH
NOT LESS
THAN 75%
OF T
Cross Section
B
C (Typ.) L
L
MITER JOINT
AVOID HOLES
IN CORNER
IF POSSIBLE
D
D
J
K
A
H
G
F
SPLICED
JOINT
OPTIONAL
110
100
90
80
70
60
50
40
30
10 100 1 10 100 1
Attenuation (dB)
kHz MHz GHz
Frequency
E Field
H Field
Plain Wave
Beyond
Instrumentation
Table 1 POLA-H Strip Gasketing
Order quantities should be multiples of 3 ft. For custom gaskets, provide drawings. Chomerics will assign part numbers.
NOTES:
1. Bonded joint uses Clear Silicone RTV.
Dimensions and
Tolerances of POLA-H
Fabricated Gaskets
Figure 1 Figure 2 Shielding Effectiveness of POLA-H Gaskets
Table 2 Tolerances (for Assemblies see Figure 1)