DYNASHEAR™ Card/Cage Gaskets
The Best Response to EMI Shielding for Card/Cage Applications
Schlegel Electronic Materials, SEM, continues their technical leadership in fabric-over-foam EMI shielding gaskets with the introduction of the DYNASHEAR™ gasket for card/cage applications. Our worldwide SEM engineering team reviewed the mechanical constraints linked to the Blades/Shelf environment (VME, PCI, ATCA) to create a completely innovative EMI shielding gasket family able to offer superior features over metal fingerstock.
See the Press Release
SEM’s DYNASHEAR™ gaskets are constructed with:
- SEM’s unique D-shape profiles
- Low memory ultra-soft foam
- Abrasion resistant conductive fabrics offers electronics designers the necessary edge for improved competitiveness.
See Electronic Environment article on improved gasket design (PDF)
Compression Load Deflection (CLD) for EJ9732Txxxx
DYNASHEAR™ gaskets by SEM insures maximum shielding even at low compression by means of our unique D-shape design.
SEM’s DYNASHEAR™ gaskets offer one of today’s best ratios of compression vs. load due to it’s ultra-soft open cell urethane foam. Ideal when cummulative tolerances decrease the gap between modules and increase the compression on the gasket.
| Compression Force | 0.70 lbs.-inch at 40% compression* |
| Contact Resistance | 0.012 Ohms-inch at 40 % compression* |
| Compression Set | 15.4 % when compressed 50 % for 22 hrs. at 70¡C* |
| Recommended compression for maximum shielding: | 1-70% |
| Shielding Effectiveness | 96 dB (average) 20 MHz-10 GHz - Mil DTL 83528 C (NiCu-C70 fabric cladding) |
| Abrasion Resistance | No change in surface resistivity 800,000 cycles -NiCu-C70 fabric cladding |
| Operating Temperature | -400F - +1580F (-400C ,+700C) in accordance with ASTM D3374 |
| Flammability | V-0 |
| Compliance | 2002/95/EC ( RoHs) Compliant |
| Peel Strength | 3M Adhesive 90¡ peel strength on stainless steel : 128/142 Oz./in after 72 hours ÐASTM D3330 |
| *Results measured on DYNASHEAR™ gasket part number EJ9732Zxxxx | |
 |
2.0mm
|
2.3mm
|
2.7mm
|
3.3mm
|
3.8mm
|
|
| 8 mm | EV3732Zxxxx | EP1732Zxxxx | EU8732Zxxxx | EV6732Zxxxx | EV7732Zxxxx | |
| 10 mm | EJ8732Zxxxx | EJ9732Zxxxx | EK1732Zxxxx | EK2732Zxxxx | EK3732Zxxxx | |
| 12.7 mm | EK4732Zxxxx | EK5732Zxxxx | EK6732Zxxxx | EK7732Zxxxx | EK8732Zxxxx | |
| xxxx: specifies length in the form xx.xx" | ||||||
| Standard parts supplied with wide release liner. PSA: 2 strips of adhesive is standard | ||||||
