POLA-H® Composite Gasketing
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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)