EESeals™ from Quell, Inc. provide EMI and transient protection in a wide variety of applications. Formed from a unique silicone rubber and slightly oversized, they adapt themselves to the space where they are installed. This conformal quality maintains electrical contact for any devices within the shield. Specifically, MOVs, resistors, and other components can be added to the … [Read more...]
Capacitor Termination Can Enhance Reliability
Using a polymer termination for multilayer capacitors forestalls damage during PCB assembly Matthew Ellis For safety critical applications such as aerospace and military, failure caused by a short circuited capacitor could be disastrous. One of the most reliable components for surface mount communications is the multilayer ceramic capacitor, in which a block of ceramic … [Read more...]
Software Simulation Boosts the Efficacy of PCB Design
Adding an effective package to the design cycle can pinpoint areas critical to EMC compliance Dirk Müller, FlowCAD, Munich, GERMANY Ultimately, electromagnetic compatibility can be validated only in the measurement chamber with existing prototypes. Those tests are time consuming and expensive. There are various ideas for cutting the costs of testing with early software … [Read more...]
Expanded Line of IEC Inlet Filters Comes in a Variety of Options
The new FN 9244 filters from Schaffner have expanded that company’s existing IEC filter inlet range. They are available in a variety of options and can be mounted in various ways. The line includes three attenuation classes: standard performance, high performance, and very high performance. All the new filters have been designed for a continuous operating voltage of 250 VAC, … [Read more...]
New Line of Filters Targets Portable Applications
The AOZ803x family of multi-line EMI filters from Alpha & Omega Semiconductor has been crafted to provide EMI/ESD protection in next-generation, portable handheld devices. These filters were designed using the company’s proprietary TVS2™ technology—i.e., Transient Voltage Suppression utilizing Trench Vertical Structures. This filter family features three products: the … [Read more...]
Slim Line EMI Filters Crafted to Ease Assembly and to Reduce Material Costs
The newly introduced 088 Series from LCR Electronics integrates a high attenuation EMI filter and IEC power entry socket with an illuminated power switch and either a fuse or a re-settable circuit breaker in one compact package, reducing the number of components that need to be fitted into a system. Initially developed for use in sports and fitness equipment, which typically … [Read more...]
Digi-Key and Schaffner EMC Announce Global Distribution Agreement
EMI/RFI component manufacturer, Schaffner EMC, and electronics distributor have announced that the two companies have entered into a global distribution agreement for the distribution of Schaffner’s full line of EMC and power quality products, such as chokes, filters, pulse transformers, and feed-through components. Schaffner’s products, now available on Digi-Key’s website, … [Read more...]
Improving the Way We Measure Insertion Loss
A proposed set of new test methods may provide more accurate attenuation data Kermit O. Phipps, Philip F. Keebler, Bradford R. Connatser Many commercial and industrial electrical environments contain equipment that is sensitive to radio-frequency (RF) interference. Theft detectors, digital sensors, and medical-telemetry systems have all been known to malfunction in the … [Read more...]
Performing GR-1089-Core Lightning and Power Cross Test
A review of the test methodologies and equipment required to perform GR-1089-CORE lightning and power cross testing James Press, Jennifer Lawrence, Mark Betts, John Ngo ABSTRACT The pitfalls and difficulties in performing testing in accordance with GR-1089-CORE, Section 4 are discussed. A brief description of the GR-1089-CORE document is presented to familiarize the reader … [Read more...]
EMC in Space …
Successfully dealing with EMC in space systems requires strong EMC engineering Daryl Gerke, PE, and William Kimmel, PE Many of us in the EMC business came of age during the “space race” of the 1950s, 60s, and 70s. We well remember names like Sputnik, Mercury, Gemini, and of course, Apollo. Some of us in the EMC business have even been fortunate enough to spend some (or all) or … [Read more...]
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