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A new ground bond tester provides 60 A of test current. The Model 2660 is designed to provide enough test current for products with higher input current ratings. The enhanced ground bond tester includes features such as a liquid-crystal display, electronic dwell, test setup memory, and advanced remote control. The LCD allows operators to view test results and setup parameters. The electronic dwell provides consistent, accurate timing and testing. The unit's test setup memory allows up to five sets of test parameters to be stored and recalled for ease of use. The basic remote control provides operators with all of the remotes required to configure the instrument through simple PLC relay control. This function allows the 2660 to be easily integrated into any production line test station. Additional features include milliohm offset capability, no-load setup, adjustable output current, and milliohm trip current. The unit has front-panel controls and user-selectable output frequencies. Slaughter Company, Inc., Lake Forest, IL; tel.: 847-932-3662; fax: 847-932-3665; e-mail: info@hipot.com; Internet: http://www.hipot.com.

A family of easy-to-fabricate electrical barrier materials offers superior mechanical properties in addition to standard-duty to high-performance electrical insulation capabilities. Manufactured by a wet-laid process that instills very good consistency and uniformity, Voltoid materials are mostly available in sheet form and are well suited for die-cutting, punching, folding, and forming. Voltoid V-090 is a medium-density fire-retardant electrical insulation material composed of organic and inorganic fibers and inorganic fillers bound in a proprietary latex matrix. It has a flame class rating of 94-5VA and can be used in proximity to heat sources. This material comes in a roll, in a thickness of 0.015 or 0.030 in., and is highly flexible. Interface Solutions Inc., Lancaster, PA; tel: 717-207-6006; fax: 717-207-6080; e-mail: vkburriss@sealinfo. com; Internet: http://www.sealinfo.com.

An easy-to-mount modular fence system for shielding PCBs at the source entails no tooling costs. Within seconds, a single fence strip can be turned into any of numerous possible boxes with dimensions varying in 6.35-mm increments. The fences come in standard widths of 4, 8, 12, 16, and 20 mm as well as customer-specified alternatives, and are available in thicknesses of 0.12 to 0.5 mm. The system is also offered in a self-adhesive mounting version and with optional insulation, extra cooling holes, or clip-on cover. It can be supplied ready-made to requested dimensions. Holland Shielding Systems B.V., Dordrecht, The Netherlands; tel: +31 78 6131366; fax: +31 78 6149585; e-mail: info@hollandshielding.com; Internet: http://www.hollandshielding.com.

The 65-W single-output R65 power supply unit (PSU) has an industry-standard 3 X 5-in. footprint yet operates at full loads at 60°C, as compared with 40°– 45°C for other PSUs in its class. In addition to the high thermal performance, the PSU offers a universal autoranging voltage of 90–265 V ac, and full compliance with such EMI/EMC and safety specifications as UL 1950, CSA 1402-3, EN 60950, EN 55022 Class B, and EN 61000-4-4 and 61000-4-5. Five available models have output ratings of 5– 48 V, with continuous power output of 65 W and current of 1.35–12 A. Short-circuit protection, 1% peak-to-peak voltage at maximum load, and ±1% line and load regulation are standard. Radius Power Inc., Orange, CA; tel: 714-289-0055; e-mail: bobs@radiuspower.com; Internet: http://www.radiuspower.com.

Greater power-handling capabilities than were available with 77-mm rectifiers and silicon-controlled rectifiers (SCRs) are provided by 85-mm Model TC and 100-mm Model TD SCRs. In addition, 85-mm Model RC and 100-mm Model RD rectifiers are available. The TC SCRs are available in 600- to 6500-V versions and with current ratings to 4000 A. TD SCRs come in 600–6500 V and current ratings to 5000 A. RC and RD rectifiers also are supplied in 600- to 6500-V models; the former is current-rated to 7000 A and the latter to 8000 A. All of the products have low-profile packages with high thermal impedance ratings that make possible the high maximum current ratings. Phase-control and inverter-grade SCRs and general-purpose and fast-switch rectifiers are offered. Powerex, Youngwood, PA; tel: 800-451-1415; Internet: http://www. pwrx.com.

A line of high-efficiency 19-in. rack-mount inverters for applications requiring constant ac power from dc input provides 1500 W of power in an ultrathin 1U package weighing 12.34 lb. SLI-series inverters offer good psophometric noise reduction by means of a control algorithm that compensates current harmonics on the dc side without passive filters. Four models cover combinations of 24- or 48-V-dc input and 115- or 230-V-ac output. The inverters have an integrated controller and optional static transfer switch to provide plug-and-play capability without requiring an external subsystem. They can be connected in parallel for N+1 redundancy and higher power. Magnetek Inc., Power Electronics Group, Chatsworth, CA; tel: 818-727-2216; fax: 818-727-2276; Internet: http://www.magnetekpower.com.

A family of ultra-low-profile, high-efficiency dc-dc power convertors features open-frame single-package construction designed for operation without a heat sink. Original offerings in the Monsoon obPower family are a single-output eighth-brick convertor capable of delivering up to 40 A at 1.8 V with 89% efficiency at full load, and two dual-output quarter-bricks offering 20 A per channel and 90% efficiency at full load. Synchronous rectification and advanced control techniques maximize efficiency and transient response. Surface-mount components and planar in-the-board transformer structures limit package height to 7.7 mm to accommodate requirements of tight interboard rack spacing. The convertors have 48-V inputs and isolated outputs. Artesyn Technologies Inc., Eden Prairie, MN; tel: 952-392-6538; fax: 952-392-6677; e-mail: karen.scheldroup@artesyn. com; Internet: http://www.artesyn.com.

A multifiber two-piece backplane connector system comprises a female connector and a male jack with six MT-style ferrules; optical fibers number 48, 72, or 144, depending on the ferrule configuration. Designed to Telcordia GR-1435-CORE requirements, the MPAK connector system features rugged nickel-plated cast-zinc housings to shield and isolate EMI. It comes in configurations for card or chassis mounting. Shutters on the connector and the jack provide eye safety and dust protection. Single- and multimode versions, as well as a combination in the same connector/cable, are available. An optional integrated device shutoff for inactive periods can extend component life. Johanson Fiber Optics Group LLC, Boonton, NJ; tel: 973-334-2676; fax: 973-334-5322; Internet: http:// www.johansonfiber.com.

Multifunction filter modules for use with very-high-bit-rate digital subscriber line (VDSL) chip sets can replace as many as 20 discrete components, minimizing component footprint and saving board space. All four available VDSL modules include a high-pass filter, a hybrid transformer, a transmit-and-receive separation filter, and a common-mode choke. Line-return loss between 4.1 and 7.9 MHz is 12 dB, isolation voltage is rated at 1500 V rms, and impedance ratings are 120 Ω for the line, 40 Ω for transmission, and 270 Ω for reception. An operating-temperature range of –40° to 85°C ensures product stability with minimal drift. The filter modules meet IEC 950 supplementary insulation requirements, and their surface-mount package is compatible with all modern pick-and-place processes. Pulse Engineering Inc., San Diego, CA; tel: 858-674-8100; Internet: http://www.pulseeng.com.

Two series of full-Kelvin four-terminal low-value current-sensing chip resistors are available for high-reliability applications. Standard features include marking of the resistance value and current-sensing terminals, and wraparound nickel barrier terminations, while epoxy-bondable terminations are available as an option. The S2512FK-series resistor measures 0.250 X 0.125 X 0.030 in. and is rated at 2 W and 200 V. The 0.200 X 0.100 X 0.030-in. S2010FK series is rated at 1 W and 150 V. Both series offer resistance ranges of 0.1–1.0 Ω and tolerances as close as 1%. They operate between –55° and 125°C. State of the Art Inc., State College, PA; tel: 814-458-3401; fax: 814-355-2714; e-mail: marketing@resistor.com; Internet: http://www.resistor.com.

The 852Q2J22 19-in. rack-mount power distribution unit offers 10 individually switched IEC 60320 Sheet F–qualified outputs and a C20 inlet. Rated at 16 A for service at 250 V ac, the unit comes with a lighted rocker circuit breaker. The UL-recognized, CSA-certified, TÜV-approved, and CE marked device is part of a family of compact 1U power distribution units designed to provide domestic and international single-phase power to equipment racks. Custom universal jumper power cords and cord sets for connection to equipment are available from the manufacturer. Panel Components Corp., Oskaloosa, IA; tel: 800-662-2290; Internet: http://www.interpower.com.

A series of 15-W fully shielded dc-dc convertors come in 1 X 2 X 0.4-in. packages and are UL 1950, cUL, and EN 60950 approved. The low-profile SC15A-series convertors come in output voltages of 3.3, 5, 12, 15, ±5, ±12, and ±15 and with input ranges of 9–18, 18–36, and 36–75 V dc. They operate in ambient temperatures of –40° to 75°C without derating. Custom modifications can be supplied with quick turnaround. Semiconductor Circuits Inc., Windham, NH; tel: 888-438-3232; Internet: http://www.dcdc.com.

A low-profile, small-footprint single-use fuse for use in high-density, space-constrained telecommunications equipment helps meet the overcurrent protection requirements of Telcordia GR-1089, FCC Part 68, and UL 60950 3rd ed. The FT600 series offers low temperature rise under sneak current-fault events to prevent damage to circuit traces and multilayer bonds. Fuses in the series are rated for maximum operating currents of 0.500, 1.25, and 2.0 A, and accommodate ambient temperatures up to 85°C. They are available in tape-and-reel packaging. Raychem Circuit Protection, Menlo Park, CA; tel: 800-227-7040; Internet: http://www.tycopowercomponents.com

A high-performance lead-free EMI filter is designed with a 0603-size ferrite bead to provide high impedance levels into the gigahertz range. The BLM18E-series filter, available in four versions, is suited to satisfy FCC requirements for high-speed cpu interface lines, high-speed buses, wireless local-area networks, and other digital equipment. The use of advanced material in a multilayer configuration makes the filter less susceptible to magnetic saturation than is the case with standard ferrite material. Murata Electronics North America Inc., Smyrna, GA; tel: 770-433-5782; Internet: http://www. murata-northamerica.com.

Silicon- and ceramic-based wire-bondable chip resistors for use in chip-on-board assemblies and multichip modules are based on a tantalum nitride film technology that produces an ultrastable precision resistive element on an ultraminiature substrate. The WBC series includes single-chip resistors, center-tapped dual-chip resistors, networks, and capacitors with multiple aluminum or gold pads for wire bonding. Resistors are offered in industry-standard sizes as single resistors on 20 X 20-mil die with two pads and as two-resistor elements on 30 X 30-mil die with six pads. They carry a 0.25-W power rating, have resistance values of 10 Ω to 150 kΩ, and feature tolerances to ±0.1% with temperature coefficients of resistance to ±25 ppm/°C. Custom sizes and pad layouts are available. Capacitors are offered in sizes to 60 mil square and with values of 10–700 pF. TT Electronics IRC, Corpus Christi, TX; tel: 361-992-7900; e-mail: afdsales@irctt.com; Internet: http:// www.irctt.com.

The Model 4283-1300 fine-wire high-voltage transformer delivers 0.2 W of continuous power within a wide operating-temperature range. Featuring open construction and a 0.22-in.-high surface-mount design, the flexible transformer operates typically at frequencies to 500 kHz with output as high as 800 V. Available in full-wave and flyback designs to meet demanding application requirements, it can be custom configured. The device comes in tape-and-reel and tube packaging, and is compatible with reflow soldering processes involving temperatures to 220°C. Datatronics Romoland Inc., Romoland, CA; tel: 909-928-7700; fax: 909-928-7701; Internet: http://www.datatronicsromoland.com.

A family of highly integrated SiGe vector multipliers features a 12-dB gain-control range, a 360° phase-control range, and flatness in these areas of ±0.25 dB and ±0.25°, respectively. The MAX204x family displays very good constant-group-delay performance over a control signal bandwidth of 260 MHz, optimizing the adjacent-channel leakage power ratio. With high switching speed, the devices suit feed-forward and hybrid digital predistortion-based designs. An on-chip RF gain amplifier provides 8 dB of gain to remove the need for an external amplifier. The design includes current- and voltage-mode inputs. The vector multipliers are designed for use with GSM/DCS/PCS. EDGE, iDEN, PHS, CDMA, and 3G linearized power amplifiers for cellular base stations. Maxim Integrated Products, Sunnyvale, CA; tel: 800-998-8800; Internet: http://www.maxim-ic.com.

The T-Frame for AdvancedTCA is a rugged, portable telecommunications test and development system for designers of advanced telecom computing architecture (ATCA) switch fabric boards and systems. The eight-slot system provides the functionality and control of a fully compliant ATCA shelf along with open access to test points and in-circuit test devices. System components include a shelf management controller to monitor and control operation of the ATCA boards and shelf; a backplane that supports dual-star switch fabric routing at data rates of 3.125 Gb/sec and up; and power distribution capability. The open-frame 12U-high unit is mounted on a tilt stand and provides easy access to front and rear boards for probes and debugging. The air cooling system can handle ATCA heat loads of 200 W per board. Tracewell Systems Inc., Westerville, OH; tel: 800-848-4525; e-mail: mlong@tracewell.com; Internet: http:// www.tracewellsystems.com.

A line of IEC- and UL-compliant miniature circuit breakers offers alternative to fuses in industrial controls and automation applications. FAZ circuit breakers come in sizes of 0.5–63 A, all with a switching capacity of 10 kA to protect against resistive, inductive, and highly inductive loads in accordance with IEC/EN 60898. Suitable as supplementary protectors conforming to IEC and UL 1077 and as branch circuit– protective devices according to UL 489, they are functionally equivalent to panel-board breakers. The fuseless DIN-rail-mountable devices provide visual on-off indication. They are available in a variety of single- and multipole configurations and with such optional accessories as bus bars and wire connectors, voltage trips, and auxiliary contacts. Moeller Electric Corp., Franklin, MA; tel: 508-520-7080; fax: 508-520-7084; e-mail: sales@moellerusa.net; Internet: http://www.moellerusa.net.

A surface-mount power inductor 1 mm high and having a 7.4 X 7.3-mm footprint is suitable for use in handheld devices. The RL-7200-series inductor covers inductance values from 1 to 560 µH. It is completely shielded to eliminate EMI. Performance is consistent over the operating temperature range of –40° to 85°C. The inductor is supplied in tape-and-reel format, 8000 units to a reel. Renco Electronics Inc., Rockledge, FL; tel: 321-639-1000; fax: 321-639-1600; e-mail: ewrensing@rencousa.com; Internet: http://www.rencousa.com.

A small-form-factor-pluggable (SFP) transceiver offers gigabit Ethernet speeds over Category 5 unshielded twisted-pair copper cable, eliminating the need for exotic copper cable or fiber-optic cable to achieve bidirectional communication at gigabit-level speed. The transceiver mates by means of a standard RJ45 interface with built-in magnetic coupling circuitry, and fits into industry-standard MSA-compliant SFP equipment. It is suited for local-area network backbones and drops up to 100 m, and has proven capable of exceeding the 100-m gigabit Ethernet standard in many applications. The transceiver operates from a single +3.3-V power supply and has a die-cast metal housing that provides high-level EMI and RFI protection. The ejector latch facilitates disconnection of RJ45 cable assemblies even when transceivers are ganged in equipment racks. dataMate Products, Methode Electronics Inc., Chicago, IL; tel: 708-867-6777; fax: 708-867-3149; e-mail: datamate@methode.com; Internet: http://www.methode.com.

Ultrasmall surface-mount crystals measuring 3.2 X 2.5 X 0.6 mm and weighing 17 mg typical provide the electrical performance required for Bluetooth applications. Lead-free NX3225DA-series crystals are available in a frequency range of 16–55 MHz, with 16.0, 20.0, 24.0, 26.0, and 32.0 MHz being typical. Their frequency tolerance at 25° ± 3°C is 10 ppm and their high-performance temperature range –10° to 60°C; operation is possible between –40° and 85°C. The crystals have a drive level of 10 µW and can withstand a maximum of 100 µW. Standard load capacitance is 10 pF. Equivalent series resistance is 100 Ω maximum in the frequency range of 16–30 MHz, and 50 Ω maximum in the frequency range of 30–55 MHz. NDK America Inc., Schaumburg, IL; tel: 800-635-9825; e-mail: sales@ndkxtal.com; Internet: http://www.ndk.com.

A line of splitters for asymmetrical digital subscriber lines (ADSLs) are available in versions for POTS with various impedances and in integrated services digital network (ISDN) versions for 2B1Q and 4B3T systems. The plug-and-play devices are optimized to suit the requirements of the destination country. The CE-approved splitters feature very compact housings, fixtures for wall mounting, and variable connectors. They display good filter characteristics with respect to insertion loss, return loss, and stop-band attenuation. The ADSL splitters are supplied with customized labeling, instruction manuals, and installation material. Vacuumschmelze GmbH & Co. KG, Hanau, Germany; tel: +49 6181 380; fax: +49 6181 382645; e-mail: info@vacuumschmelze.com; Internet: http://www.vacuumschmelze.com.

A double-ridged-guide horn antenna offers a frequency range of 1–18 GHz and can be used for emissions and immunity testing in chambers or open-area test sites. The versatile BHA 9118 linearly polarized broadband antenna incorporates a precision "N" connector that ensures good power handling and a low voltage standing-wave ratio. It has a field strength capability of 250 V/m at 1 m and a high typical gain of 5.5–15 dBi. Featuring a mounting bracket with ¹/₄-in. camera thread hole, the rugged, corrosion-resistant antenna is solid aluminum on two sides and fiberglass with protective strips on the others. Each antenna supplied is calibrated to ANSI C63.5 standards and accompanied by a calibration certificate. Schaffner EMC Inc., Edison, NJ; tel: 732-225-9533; fax: 732-225-4789; e-mail: jparnell@ schaffner.com; Internet: http://www.schaffner.com.

A comprehensive line of batteries for OEM and replacement applications in telecommunications, industrial, and consumer products includes alkaline, carbon-zinc, primary and rechargeable lithium, nickel-cadmium, nickel–metal hydride, and sealed lead-acid types. Batteries are available in coin cell, button cell, and standard cell configurations and with PC-mount and custom terminations. Battery packs with and without protective circuitry may be specially ordered. Products are specified in a 14-page full-color catalog. EHM Technology Inc., Bolingbrook, IL; tel: 630-771-0579; fax: 847-952-9023; e-mail: info@ehmtech.com.

A line of inductors only 3 mm high are suited for high-current applications in telecommunications equipment, computers, and portable power devices, as well as for energy storage, dc-dc conversion, and I/O filter applications. Nine models of the low-profile Coiltronics FP3 inductors are available with inductance ratings from 0.1 to 4.7 µH and with operating frequencies up to 5 MHz. They can accommodate current as high as 34.7 A dc and operate at ambient temperatures between –40° and 85°C. Their low height and low dc resistance make the devices appropriate for use in voltage regulator modules. The inductors are available in tape-and-reel packaging. Cooper Electronic Technologies, Boynton Beach, FL; tel: 561-752-5000; fax: 561-742-0134; Internet: http://www.cooperet.com.

Miniature Pulse Transformers

Space-saving general-purpose pulse transformers offer minimum primary inductance values of 100 µH to 10 mH and isolation ratings of 1 kV rms. Supplied in surface-mount and through-hole versions, the toroidal 786-series transformers can be used for line coupling, matching, and isolation. They also are suited for small isolated power supplies and serve as common-mode chokes in filtering applications. Winding configuration options are 1:1, 1:1:1, 2:1, 1CT:1, and 1CT:1CT. Dc resistance values range from 0.17 to 1.34 Ω. Fully encapsulated in UL 94V-0 materials and specified for operation within 0°–70°C, the DIP transformers measure 9.52 X 8.89 X 6.35 mm and the surface-mount versions 12.70 X 8.89 X 6.35 mm. C&D Technologies Inc., Tucson, AZ; tel: 520-295-4300; fax: 520-741-4598; e-mail: sales@cdtechno.com; Internet: http:// www.cdtechno.com and http://www.cdpoweronline.com.

ESD-Protective Connector Caps

Three series of plastic caps are available to provide ESD protection for D-subminiature connectors. All feature a flanged top to facilitate placement and removal, and each offers 10 sizes to fit the socket and pin ends of connectors in the standard sizes of 9, 15, 25, 37, and 50. DS-Q1-series black conductive polyethylene caps feature surface resistivity below 10⁵ Ω/sq and meet surface resistivity and static decay requirements of MIL-B-81705D Type I. DS-Q2-series pink static-dissipative polyethylene caps provide constant surface resistivity of 10⁶–10¹² Ω/sq and meet the static-decay requirements of MIL-B-81705D Type II. DS-Q3-series caps, made of an inherently conductive polymer compound, use a dark green nonsloughing material and have a volume resistance of 10⁵ (omega). Niagara Caps & Plugs, Erie, PA; tel: 800-458-0465; fax: 800-358-4391; e-mail: info@niagaracapsandplugs.com; Internet: http://www.niagaracapsandplugs.com.

Power Supply

A low-profile 30-W power supply operates at full power in ambient temperatures between –10° and 50°C without forced-air cooling. The RKW-series supply offers universal ac input and overvoltage and overcurrent protection. It is compliant with FCC Class B and EN 55022-B standards for conducted and radiated emissions. DIN rail mounting can be easily effected with an optional kit. Kepco Inc., Flushing, NY; tel: 718-461-7000; fax: 718-767-1102; e-mail: sailk@kepcopower.com; Internet: http://www.kepcopower.com/rkwo.htm.

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