Electronics Protection - September/October 2013 - (Page 19)

EMI/EMC/ESD TVS Diode Arrays Provide Protection Against ESD and Lightning-Induced Surges Ferrite Suppressors Clear Interference Littelfuse, Inc. has introduced the SRDA3.3 series TVS Diode Array – SPA Diodes. The SRDA3.3 series integrates low-capacitance steering diodes with an additional zener diode to protect data lines against electrostatic discharge (ESD) and high surge events. The SRDA3.3 Series devices provide 40 percent greater protection without performance degradation. With up to 600 W of power dissipation, these devices outperform similar market solutions by 20 percent in power handling capability. In addition, the low loading capacitance of 10 pF (max) of the SRDA3.3 series is 50 percent lower than other solutions, which makes it well suited for protecting telecommunications interfaces without sacrificing signal integrity. Applications include tertiary (IC side) protection of high-speed T1/E1/T3/E3 telecommunications data lines, xDSL interfaces, RS232/RS-485 interfaces, 10/100 Ethernet interfaces and video lines. “The SRDA3.3 series surge, power dissipation and ESD performance, gives circuit design engineers a simple way to provide greater overhead against electrical threats as defined by industry standards,” said Chad Marak, director of the TVS Diode Arrays product line, Littlefuse, Inc.. “The low dynamic resistance of these devices ensures very low clamping voltages, which helps protect today’s increasingly sensitive chipsets from premature failure.” Enhanced DC LISN from Teseq Measures Disturbances at Higher Current Teseq is offering a high current impedance stabilization network (LISN) for measuring conducted emissions disturbances on DC power ports of photovoltaic (PV) inverters. The DC-LISN-M2-100, which conforms to the latest requirements of the international standard working group MT GCPC (grid connected power conditioners), can run at a maximum operating current of 150 A for 30 minutes, or continuously at 100 A. This enhanced unit offers a maximum operating voltage of 1,500 V and measures disturbances over a frequency range of 150 kHz to 30 MHz. The DC-LISN-M2-100 provides improved performance, testing with impedance levels of 150 Ohms in commonmode and 100 Ohms in differential-mode. Research results have shown that a typical artificial mains V-network as described in CISPR 16-1-2 cannot be used for the assessment of unsymmetrical disturbances of a photovoltaic inverter’s DC port. CDNs based on IEC/EN 61000-4-6 are typically not specified for high common-mode currents or differential-mode disturbances. Additionally, depending on the switch position, the LISN works as V, Y or Delta shape as well as offers a defined termination impedance from 1 kHz to 30 MHz. The front panel of the DC-LISN-M2-100 includes an earth plane connection bar, an EUT port, a switch for selecting the LISN type, as well as a receiver port. The back of the DC-LISN-M2-100 features a power input with selectable ranges of 230 V or 110 V for the unit’s two cooling fans (also located on the back panel), an EUT power input for a PV generator/simulator and a protective earth connection. An optional calibration kit is available for this unit. On a daily basis, there are millions of electronic devices that operate in close proximity on a very narrow portion of the wireless communications spectrum that spans from 30 Hz to 300 GHz. Due to antenna size, power, range, cost constraints and FCC regulations, most of our personal electronics crowd an even a smaller portion of that spectrum (5 GHz and below). Therefore any uncontrolled electromagnetic radiation in this frequency range can interfere with the normal operation of your electronic device. Control of electromagnetic and radio frequency interference (EMI/RFI) is a major engineering concern for all electronics manufacturers. Unfortunately, many of these problems are not known until the costly, testing stage of development. In many instances, it is discovered that a data cable or even power cord is acting as an antenna, causing unacceptable levels of interference to spill into the environment. One of the easiest and most cost-effective solutions for this type of shielding problem is to attach a ferrite suppressor to the origination and/or termination ends of cables. Bisected FerriShield Ferrites from Leader Tech are available in an assortment of styles and sizes and can quickly be snapped onto a cable that has already been terminated. The company offers hundreds of frequency-specific ferrite solutions for both round and flat cables. As an added advantage, Leader Tech maintains a massive inventory of Ferrishield Ferrites for immediate delivery. October 29-31, 2013 TD Convention Center Greenville, SC southteconline.com generating momentum WORKFORCE | TECHNOLOGY | MANUFACTURING Southeast manufacturing is revitalizing the U.S. economy and the industry experts who exhibit at SOUTH-TEC are leading the charge. Featuring state-of-the-art suppliers, distributors and equipment builders, you’ll ﬁnd all the manufacturing products and services you need to help your business grow. SOUTH-TEC is the single best source to build your manufacturing momentum. Register Today. September/October 2013 www.ElectronicsProtectionMagazine.com 8364_SouthtecAd_ME 1/4 pg.indd 1 For Exhibiting and Attending OFFICIAL MEDIA PARTNER © SME 2013_8364 19 6/14/13 7:32 AM http://www.southteconline.com http://www.southteconline.com http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - September/October 2013

Geist Unveils Rapid Deployment Data Center Environmental Monitoring System
Enabling Effective Thermal Management with DCIM
Predicting Gasket Performance: SE Measurements with a TEM Cell to Study Gasket Reliability
Rack Containment 101
The Nine Core Elements of DCIM
Using Electronic Locking Solutions to Secure Enclosures and Meet Storage Compliance Needs
Hammond’s HJ Series Ticks All the Boxes
Rogers Introduces Poron SlimGrip Foam
Ferrite Suppressors Clear Interference
Fujipoly Thermal Sheets are a Cooling Influence on LED Lighting
GE Introduces TLE Series UPS Platform
Gore PolyVent XL Improves Reliability of Large Outdoor Enclosures
IMI Sensors Launches Linear Adjust Mechanical Vibration Switch
Industry News
Calendar of Events
Five Ways to Realize Server Room Profitability

Electronics Protection - September/October 2013