EMI/EMP Filter Connectors Catalog - Glenair, Inc.

Introduction to Filter ConnectorsEMI Filters and Transient Voltage Suppression PackagingIntroductionEMP and TVS DefinedElectromagnetic Pulse (EMP) refers to theintense radio frequency pulses produced by nuclearexplosions at high altitudes. Other names for thisinclude Nuclear EMP (NEMP) and High-AltitudeEMP (HEMP). Similarly, System Generated EMP(SGEMP) refers to electrical noise resultant fromlarge amounts of composite skin used in satellites,aircraft and helicopters that discharge over time.Like other forms of electromagnetic interference,EMP can have a destructive effect on sensitiveelectronic devices, particularly those used inmission-critical military applications. This occursif and when the EMP couples to an antenna oran unshielded cable and passes unmolested intoan electronic device. EMP hardened equipmentis designed to protect vital communications at atime when unhardened devices are likely to fail.Thus it is a standard requirement for many militaryapplications to proactively protect certain devicesfrom EMP via the integration of Transient VoltageSuppression technologies into the connectors thatservice the device.Transient Voltage Suppression (TVS)technologies are designed to shunt voltagetransients directly to ground before such surges candamage sensitive electronic equipment. IndividualTVS diodes as well as diode modules may beincorporated directly into the filter connector packageto provide optimal protection for either individualcontacts or groups of contacts without significantincreases in connector size or weight. Individualcircuit protection diodes and diode modules areavailable for all connector types and are routinelystocked by Glenair to reduce lead-times. Fieldmaintenance and repair of damaged diodes isalso possible as both individual diodes and diodemodules are easily removed from the connectorpackage. RTCA DO-160 and other electricalperformance standards now define acceptablebenchmarks for withstanding electromagnetic pulse,lightning strike, or other induced voltage surges.Glenair designs all TVS equipped filter connectors toconform to the RTCA DO-160 standard.Hermetic PackagingHermetic connectors are specified forapplications as divergent as submarines andorbiting satellites. They are deployed to resistmoisture ingress in underground applicationsand to withstand pressure differentials invacuum chambers, laboratory equipment andcommercial and military aircraft. Hermeticconnectors, such as the MIL-DTL-38999 SeriesI, II, III and IV supplied by Glenair, are principallydesigned for use in military aerospace—in fact,the requirement for connector hermeticity wasoriginally driven by military electronic applications.But the products are equally at home incommercial applications such as oil-patch loggingequipment or medical devices.Hermetic connectors are constructed from acore component-set that includes the connectorshell, a vitreous glass insert and the selectedcontacts. Shells may be machined from stainlesssteel or Kovar®, an iron-nickel-cobalt alloy witha co-efficient of expansion closely balanced tothe glass inserts. Contacts used in hermeticconnectors must be fabricated from high-gradeiron/nickel materials that can withstand high-heat,and bond effectively to the vitreous glass seal.As with other connector families, hermeticcustomers may specify the connector couplingstyle (threaded, bayonet, etc.), pin or socketgender and layout, contact termination type(solder cup or PCB termination), conductive ornon-conductive finish, polarization and so on.Glenair’s complete in-house hermetic capabilityaffords us the ability to produce a wide-range ofspecial purpose hermetic connectors designedto meet individual and unique customerspecifications—such as EMI/EMP filtering.Hermetic class EMI/EMP filter connectorsare available throughout our complete range offiltered connector products in both Pi and C from400 pF to 56000 pF. Connector platings andmaterials are offered in class H2 (stainless steel,electroless nickel).A© 2008 Glenair, Inc. CAGE Codes 06324Printed in U.S.A.GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912www.glenair.comA-13E-Mail: sales@glenair.com