Power Electronics

Spotlight on Passive Components

Multi-Anode Tantalum Cap

TPM multi-anode capacitors are ideal for power supply decoupling in high-speed data processing applications and in circuits where very high capacitance and ultralow ESR are required. They have capacitance values from 470µF to 1000µF with tolerances to ± 20%. They meet requirements for processor filtering and offer low ESR values down to 18mΩ and ripple current ratings up to nearly 4Arms with an operating temperature range of -55°C to 125°C.
AVX Corp., Myrtle Beach, S.C.
Circle 352 freeproductinfo.net/pet

High Current In-Rush Current Limiter NTC

The SCL Series in-rush current limiter NTC thermistor operates current up to 30A (0.5Ω). Available in 15 mm, 20 mm, and 30 mm disc package covering values such as 2.5Ω 15A and 20A, 5Ω and 10Ω at 10A and 15A. T and R package is available for 15 mm and 20 mm disc size. They're ideal for motor control and power supplies applications.
Inter-Technical, LLC, Elmsford, N.Y.
Circle 358 freeproductinfo.net/pet

Chip Resistors

This new line of high-reliability, high-power chip resistors uses thick and thin film on AlN and beryllia. The new components have a maximum power rating five times higher than conventional chip resistors.
State of the Art Inc.,State College, Pa.
Circle 301 freeproductinfo.net/pet

Wire Bondable Chips

The WBC Series product family includes single chip, center tapped dual-chip networks and capacitors with multiple pads for wire bonding. The single chip measures 20 mil2 with custom sizes, schematics, and resistance values available. Capacitors are available in sizes to 60 mils2 with values from 10 pF to 700 pF. Standard sizes are available as single resistors on 20 mil × 20 mil die with two pads for wire attachment and as two-resistor elements on 30 mil × 30 mil die with six pads. Aluminum or gold bond pads and are available in waffle pack, Gel Pak, stretched wafer or wafer form.
TT electronics IRC, Corpus Christi, Texas
Circle 355 freeproductinfo.net/pet

Capacitors with Mixed Dielectric

Wima MKM and FKM series (in self-healing metallized and film/foil types) are low-cost substitutes for polycarbonate and PPS capacitors. Properties of this mixed dielectric are an almost linear capacitance/temperature coefficient with low inductance, suitable for reservoir and decoupling capacitors in applications with broad temperature ranges. Capacitance ranges for the MKM series are from 1000pf up to 4.7µF, and from 100pf up to 0.033µF up to 400Vdc in the FKM series.
The Inter-Technical Group Inc., Elmsford, N.Y.
Circle 356 freeproductinfo.net/pet

Overcurrent Protection Devices

The MF-R/250 and MF-RX/250 250V overcurrent protection products protect telecom networks from hazards, such as lightning strikes. With a range of operating currents and Ihold values from 80mA to 180mA and initial resistance values from as low as 0.8Ω up to 22Ω, they're available as epoxy coated for greater insulation, uncoated for faster tripping times, or narrow and binned resistance ranges for line balancing.
Bourns, Riverside, Calif.
Circle 351 freeproductinfo.net/pet

Large Toroids

These large toroidal cores for inductive and suppression applications come in additional sizes of OD/ID range from 48 mm /32 mm to 152 mm/69 mm. Heights can be varied to suit specific applications. Available in power 78 material, they can also be supplied in 43 material for common-mode EMI inductors, or 61 material suitable for RF devices.
Fair-Rite Products Corp., Wallkill, N.Y.
Circle 354 freeproductinfo.net/pet

Thin-Film Back Contact Resistors

The Electro-Films Back Contact Resistor Series requires only one wire bond because a second electrical connection is made through the back of the chip, which may be attached to the substrate eutectically or with conductive epoxy. Measuring 0.020 in. × 0.020 in., they're available in a resistance range from 10Ω to 1MΩ, with tight tolerance values down to 0.1% and TCR values ranging from ±250 ppm/°C down to ±25 ppm/°C. They feature a maximum operating voltage of 75V, a breakdown voltage of 200V, and a dc power rating of 250mW at 70°C.
Vishay, Malvern, Pa.
Circle 350 freeproductinfo.net/pet

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