Issue link: https://te.mouser.com/i/1477778
* Outgassing control: Outgassing occurs when gases trapped in non-metallic materials—such as polymers used in connector inserts, seals, adhesives, or potting materials—are released in the vacuum of space or by high temperatures. The released gases can condense on and contaminate sensitive surfaces, eventually degrading the performance of charge-coupled-device (CCD) sensors in satellites, thermal radiators, or solar cells. NASA ASTM E595-77/84/90 testing and the MIL-W-22759 (M22759) | SAE AS22759 specification cover a material's performance when exposed to high heat or a vacuum. Materials c o n s i d e r e d l o w - o u t g a s s i n g m a t e r i a l s meet requirements for a Total Mass Loss of 1.00% or less and a Collected Vo l a t i l e C o n d e n s a b l e M a t e r i a l ( C V C M ) o f 0.10% or less. Space-grade Micro-D connectors and backshells must meet MIL-DTL-83513 requirements for material outgassing in a vacuum environment. * Ultraviolet resistance: In space, there is no atmosphere to protect materials from the effects of X-ray, gamma, and cosmic radiation. Ultraviolet (UV) degradation adversely influences material properties of electronic components--and can even change the molecular composition of materials, specifically by removing oxygen atoms from oxygen-containing substances. As a result, thermal control subsystems may not properly function, optics can be degraded, and solar arrays can become less efficient. At low-Earth-orbit (LEO) altitudes between 200 km and 700 km, UV excitation of the remaining O 2 molecules at the fringe of the atmosphere forms monatomic oxygen. Atomic oxygen (ATOX) corrosion occurs when these highly reactive monatomic oxygen molecules erode aluminum and plastics. One solution is to employ materials with low galvanic potential, such as space-grade polymers, thermoplastic composites, and glass (fiber optics). Plating and coatings can be used with alloys to avoid forming an electrolytic cell. Gold plating resists ATOX corrosion because gold is a noble metal that normally resists oxidation. Silicon-dioxide coatings can protect polymers from ATOX corrosion because SiO 2 is already fully oxidized. More generally, LEO satellites can utilize special UV shielding for their electronics systems.to minimize UV degradation and protect components. More Capabilities for Space-Grade Interconnections Today, the challenges for interconnects in space applications are expanding as the size and weight of components and packages must decrease. TE offers a wide range of NASA and MIL-SPEC compliant products—along with connectors, cables, and full harnessing capabilities—to help meet most data, video, optical, and control-communications need in aerospace. Count on our technical expertise, design engineering, and manufacturing capabilities to support your mission—from launch to intercept or deployment. Page 3 AEROSPACE, DEFENSE & MARINE / BACKSHELLS IN SPACE FOR MICRO-D AND D-SUB CONNECTORS te.com /space TE Connectivity, TE, TE connectivity (logo) and Every Connection Counts are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity's obligations shall only be as set forth in TE Connectivity's Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. © 2022 TE Connectivity. All Rights Reserved. Version # 04/2022Y te.com/polamco