Snubber Network

The RCN snubber network is suitable for snubbing high-frequency switching transients in switch-mode power supplies. The film-foil capacitors have externally mounted resistors for making a direct connection to ultrafast rectifiers in MD3CC packages. The direct mounting aligns the three terminals with the rectifier package. The network is constructed with two serially connected RC legs and a common center-tap terminal. The network comes assembled onto an aluminum heat-sink plate. Electronic Concepts Inc., Eatontown, NJ; tel: 732-542-7880; fax: 732-542-0524; e-mail: sales@ecicaps.com; Internet: http:// www.ecicaps.com.

Fiber-Optic Modules

The nLighten fiber-optic communications modules are 12-channel parallel optical links that transfer an aggregate bandwidth of 19.2 Gb/sec (1.6 Gb/sec per channel) up to a distance of 300 m. The vertical-cavity surface-emitting laser–based modules occupy less than 20 mm of board width. The modules transmit at a wavelength of 850 nm and are compatible with Flex-Lite fiber-optic ribbon interconnects or with standard FDDI-grade 62.5-mm multimode ribbon fibers. W.L. Gore & Associates Inc., Newark, DE; tel: 800-445-4673; fax: 302-737-2819; Internet: http://www.gore. com/electronics.

Compliance Testing

The product testing services unit offers regulatory compliance testing and consulting services. Precertification compliance verification testing and full agency certifications are available. The facilities and procedures have been assessed to ISO 17025. In addition to consumer electronic devices, the company can evaluate, test, and obtain approvals for information technology equipment as well as cells and component-level batteries. Motorola Energy Systems Group, Lawrenceville, GA; tel: 770-338-3742; e-mail: esg.feedback@ga25epd.mot.com; Internet: http://www.motorola.com/ ies/ESG/testlab/.

Programmable Power Supplies

The MX series of power supplies ranges in output power from 45 to 135 kVA. The MX45 provides single- or three-phase output modes for ac or one to three outputs for dc use. Voltage ranges are 0–150, 0–300, and 0–400 V ac, with all lines to neutral. The output frequency can be programmed from 16 to greater than 800 Hz. The power supply can be operated from a front-panel keyboard with a menu-driven interface or from an RS-232C or IEEE-488 remote-control interface. California Instruments, San Diego, CA; tel: 858-677-9040; fax: 858-677-0940; e-mail: sales@calinst.com; Internet: http:// www.calinst.com.

Surge Arrester

The Y08SV-272B gas discharge tube (GDT) is UL 1449 and UL 1414 listed and meets the VDE internal electrode gap requirement of 3 mm. When placed in series with metal-oxide varistors, the tube satisfies the agency standards for proper overvoltage protection in 110- and 220-V lines. The company's line of GDTs includes two- and three-electrode devices with break-over voltages ranging from 75 V to 16 kV dc. The GDTs are nonradioactive. Sankosha USA Inc., Torrance, CA; tel: 310-320-1661; fax: 310-618-6869; e-mail: sales@sankosha-usa.com; Internet: http://www. sankosha-usa.com.

Magnetic Shielding Newsletter

The Magnetic Shield Update is a quarterly newsletter containing engineering notes, case studies, and general articles about magnetic shielding. Print and electronic versions are available. Requests for the newsletter can be made via e-mail. Name, company name, address, and e-mail address should be included in the request. Magnetic Shield Corp., Bensenville, IL; tel: 630-766-7800; fax: 630-766-2813; e-mail: shields@magnetic-shield.com; Internet: http://www.magnetic-shield.com.

Cord Tester

When coupled with a dedicated test enclosure, an integrated mains cord tester can perform a complete series of electrical safety tests automatically and with a cycle period of 3 seconds. The tests include earth continuity, line and neutral continuity/polarity, and insulation between cores and outer surfaces of plug tops and other fitted connectors. The unit can be set for two-core lead sets, with the earth test being replaced by a sensing circuit to detect the presence of a three-core lead. Clare Instruments U.S. Inc., Tampa, FL; tel: 813-886-2775; fax: 813-886-2754; e-mail: usa@clareinstruments.com; Internet: http://www.clareinstruments.com.

Voltage-Controlled Oscillator

The SMV5300L is a voltage-controlled oscillator (VCO) suitable for applications in wireless local-area networks. The surface-mount device generates frequencies between 5220 and 5420 MHz within a control voltage range of 0.5 to 4.5 V dc, allowing the error voltage to be taken directly from the integrated circuit's charge pump circuitry. The low-profile VCO measures 0.3 x 0.3 x 0.08 in. and suppresses the second harmonic to –30 dBc. Z~Communications Inc., San Diego, CA; tel: 858-621-2700; fax: 858-621-2722; e-mail: sales@zcomm.com; Internet: http://www.zcomm.com.

Hot-Swap Controller

The HV300LG is a controller for hot-swap power management. The integrated circuit provides complete control of the power-supply connection for systems that are always powered on but require insertion or removal of cards or modules without power disturbance. Applications include server, telecommunications, and voice-over-Internet protocol systems constructed in large racks. The topology of the device offers inrush current limiting, short-circuit protection, and a power-good status signal. The device is suitable for –48 to –100 V power supplies, and comes in an eight-lead small-outline integrated-circuit package. Supertex, Sunnyvale, CA; tel: 408-744-0100; fax: 408-222-4800; Internet:http://www.supertex.com.

Multichannel Dc Source

The GX1838 is a dc source that provides eight discrete output channels and three programmable 14-bit voltage rails. Each rail can be programmed to output between –9 and 32 V and provide up to 100 mA. The rails can be connected to an external input, and rail C can be connected to an onboard programmable electronic load. Each rail can be switched to any of the output channels. Geotest—Marvin Test Systems Inc., Irvine, CA; tel: 949-263-2222; fax: 949-263-1203; e-mail: info@geotestinc.com; Internet: http://www.geotestinc.com.

Custom Transformers

Custom transformers are designed and manufactured for a range of applications. Power, telephony interconnect and switching magnetic, and cathode-ray-tube display magnetic transformers, as well as all types of inductors and coils, are available. Transformers can be designed to meet UL, CSA, VDE, TÜV, and BSI standards. Quick delivery on prototypes and small quantities is offered. Transformers are available in a variety of configurations, including printed circuit transformers with surface-mount and through-hole designs, as well as chassis-mount transformers. TransMagnetics, Johnsburg, IL; tel: 815-759-2080; fax: 815-759-2284; e-mail: sales@transmagnetics.com; Internet: http://www.transmagnetics.com.

Compact VCXO

The 7311E series of voltage-controlled crystal oscillator (VCXO) is suitable for wavelength-division multiplexing applications. The compact device measures 9.6 x 11.4 x 3.9 mm. The surface-mount device incorporates a 155-MHz fundamental crystal, a bipolar oscillator circuit, and a selected multiplier/filter circuit. The frequency stability is rated at a maximum of ±50 ppm over an operating temperature of –10° to 70°C. The VCXO operates on a supply voltage of 3.3 V dc. NDK America Inc., Schaumburg, IL; tel: 800-635-9825; fax: 847-517-2887; e-mail: sales@ndkxtal.com; Internet: http://www.ndk.com.

Custom Cable Assemblies

Custom cable assemblies can combine technologies such as injection molding, overmolding, and various types of potted components. Wire sizes can range from 10 to 32 gauge, and available connector types and terminals include ring lugs, terminal blocks, and intelligent interface products. The assemblies can range from having a single conductor to 50 pairs, with Mylar, foil, and braided copper shielding. Active and passive components, sensors, and circuit boards can be packaged in custom housings. Atcom, Woburn, MA; tel: 800-433-6600; fax: 800-282-0670; e-mail: sales@atcomhq. com; Internet: http://www.atcomhq.com.

Winding Tester

The 6815 impulse winding tester is suitable for testing wound components. The unit provides a high-voltage impulse, typically 5 kV, and analyzes the decaying waveform to identify manufacturing defects such as change in material and shorted or damaged windings. Testing can be accomplished without destroying the component. Wayne Kerr Electronics Inc., Woburn, MA; tel: 781-938-8390; fax: 781-933-9523; e-mail: sales@waynekerr.com; Internet: http://www.waynekerrtest.com.

Operational Amplifier

The MCP606 is a 2.5-V micropower operational amplifier in a SOT-32 package, providing a low-pin-count analog solution for space-constrained embedded applications. The device features an offset voltage of <250 mV, a maximum supply current of 25 mA with a single supply operation over the 2.7–5.5 V range, and a bias current of 1 pA. Available in a single operational-amplifier configuration, the device features rail-to-rail swing at output and unity-gain stability, and is fully specified from –40°to 85°C with power supplies from 2.7–5.5 V. The device is suitable for sensors, instrumentation, and battery-powered applications. Microchip Technology, Chandler, AZ; tel: 480-786-7200; fax: 480-899-9210; Internet: http://www.microchip.com.

Surface-Mount Connector

The RMX-8300-04 is a surface-mount connector suitable for 50-W applications such as cellular and wireless communications with frequencies up to 6 GHz. Snap-on mating provides rapid connects and disconnects. The connector features a gold-plated machined-brass body, gold-plated contact, and Teflon insulation. RF Industries, San Diego, CA; tel: 800-233-1728; fax: 858-549-6345; e-mail: rfi@rfindustries.com; Internet: http://www.rfindustries.com.  

CDMA Duplexer

The CER0046A is a duplexer for 800-MHz code-division multiple-access (CDMA) applications. The product has a typical performance of better than 2.0 dB on transmitting insertion loss and 3.0 dB on receiving insertion loss. The ceramic monoblock duplexer is suitable for use in low-cost or disposable handsets. CTS, Elkhart, IN; tel: 219-293-7511; fax: 219-293-6146.  

Electrostatic Voltmeter

The Model 323 electrostatic voltmeter performs sensitive voltage measurements using a variety of probes with various aperture orientations and body types. The unit is suitable for material evaluation and for measuring charge accumulation on disk-drive assemblies and other sensitive components. The voltmeter is capable of making measurements of electrostatic potentials of 0 to ±100 V over a range of probe-to-surface distances. Trek, Medina, NY; tel: 800-367-8735; fax: 585-798-3106; Internet: http://www.trekinc.com.  

Polypropylene Capacitors

The PGWA-series polypropylene capacitors are noninductive, with capacitance ratings from 1500 to 10,000 pF. The devices have wrap-and-fill construction and feature axial lead terminations. The dissipation rating is <0.04%, the pulse rise time is 600 V/µsec, and the voltages range to 15 kV dc or 2 kV ac. Applications include medical equipment, lasers, high-voltage power supplies, and test instrumentation. Seacor Inc., Westwood, NJ; tel: 201-666-5600; fax: 201-664-8544; e-mail: upsales@seacorinc.com; Internet: http://www.seacorinc.com.

EMI Filter

A line of high-current EMI filters is available in both bolt and broadband package configurations. Capacitance ratings range from 10 nF to 2 µF, voltage ratings range from 50 to 500 V dc, and current ratings range from 25 to 100 A. Both solder-contact and threaded-stud terminals are available. Applications include power supplies and communications base stations. Pacific Aerospace & Electronics Inc., Wenatchee, WA; tel: 509-665-6500; fax: 509-662-2373; e-mail: electronicsales@pcth.com; Internet: http://www. pcth.com.

Reed Relay

The CR-series reed relay is a low-profile device constructed with a ceramic case that matches the thermal coefficient of expansion of the reed-switch glass and the reed lead to eliminate any potential packaging stress. The device can switch at a rate of 6 GHz with rise times <40 picoseconds for digital operations. The 50-W relay uses no internal solder and has a 1-µV typical thermal offset. Insulation resistance typical to all points is 4.5 V dc, allowing the error voltage to be >1014 W. The device measures 8.6 x 4.4 x 3.4 mm and is available shielded or unshielded. Meder Electronic Inc., Mashpee, MA; tel: 508-539-0002; fax: 508-539-4088; e-mail: sales@meder.com; Internet: http://www.meder.com.

Ac Power Source

The AMX series of linear ac power sources produce from 500 VA to 12 kVA in single-, split-, or three-phase mode. For applications requiring more power, select models may be connected in parallel to provide up to 30 kVA of output power. All instruments are available with either manual or programmable controllers. The units offer a 50-kHz small-signal bandwidth and a peak-to-rms current ratio of 4–6:1. Applications include frequency conversion, harmonic testing, and transient simulation. Pacific Power Source, Irvine, CA; tel: 800-854-2433; fax: 949-756-0756; e-mail: sales@pacificpower.com; Internet: http://www.pacificpower.com.