Power Resistors provide optimal heat dissipation.

Press Release Summary:




Rated up to 75 W, Series BHP75 is housed in TO-220 open-screened substrate package with insulated tapered venturi bonded to substrate for maximum heat dissipation. Resistance ranges from 1 W to 100 KW, with tolerances of ±1% and ±5%. TCRs are less than 100 ppm/°C with max DC operating voltage of 250 V. Applications include switch-mode power supply circuits, motor control and drive circuits, inverters, and industrial power equipment.



Original Press Release:



BI Technologies' 75W Power Resistor Utilizes Three Methods of Heat Dissipation for Maximum Power Handling Capabilities



Unique venturi design provides constant air flow, directs heat away from component...

MUNICH, Germany (November 14, 2006) - Providing design engineers with an open screened substrate device for applications requiring superior thermal performance, TT electronics BI Technologies SMT Division has developed a non-molded power resistor rated up to 75W. Designated the BHP75 Series, the resistor is housed in a TO-220 opened screened substrate package, and features an insulated tapered venturi bonded to the substrate for maximum heat dissipation.

According to Jim Rieley, Sales Director for BI Technologies' SMT Division, the design of the BHP75 Series resistor allows for three methods of heat dissipation, resulting in exceptional power handling characteristics. "The chimney-shaped tapered venturi is attached to the ceramic substrate and convection forces hot air up the "neck" of the chimney and away from the resistor face of the component," Rieley said. "The power resistor utilizes all three methods of heat dissipation, including conduction through the heat sink tab, radiation from the resistor surface, and convection through the venturi element."

Typical applications for the BHP75 resistor include higher wattage switchmode power supply circuits, motor control and drive circuits, inverters and industrial power equipment.

The BHP75 Series resistors are rated for 75W power dissipation at tab temperature maintained at 25°C or less than 75W. Resistance ranges from 1W to 100KW, with tolerances of ±1% and ±5%. TCRs range less than 100ppm/°C, with maximum DC operating voltage of 250V and dielectric-withstanding voltage of 1KV. Thermal resistance is 1.3°C/W from the resistor's "hot spot" to the package's metal flange and operating temperature range is -55°C to +155°C.

The BHP75 device complements BI Technologies' MHP 50W TO-220 and MHP 100W TO-247 power resistors, and provides customers requiring more wattage in a smaller package with an excellent alternative, Rieley continued.

BI Technologies will also produce devices outside these specifications to meet customer requirements, with comprehensive application engineering and design support available for customers worldwide.

Typical pricing for the BHP75 Series resistors is $1.80 each in medium volumes. Lead time is from stock to 6 weeks. Samples are available immediately for engineering evaluation and customer prototypes.

For a free engineering evaluation sample of the SMHP Series power resistors, or for more information, contact the TT electronics BI Technologies SMT Division at +44-1-592-662200; via mail at Telford Road, Eastfield Industrial Park, Glenrothes, Fife, Scotland, KY7 4NX; e-mail at sales@bitechnologies.co.uk or visit the BI Technologies Web site at http://www.bitechnologies.com/products/passive.htm.

BI Technologies is a global manufacturer of power resistors and resistor networks, chip resistor arrays, integrated RC passive networks, trimming and precision potentiometers, position sensors, transformers, inductors, and hybrid microelectronics for communication, computer, automotive, medical and industrial applications, serving a global customer base with manufacturing locations in the United States, Mexico, Scotland, Japan, China and Malaysia.

TT Electronics plc is a global electronics company manufacturing a broad range of advanced electronic components, assemblies and sensor modules for the automotive, industrial, telecommunication, computer, medical and aerospace markets.

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