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Vishay rolls enhanced high-precision BMF resistors

Posted: 01 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:BMF resistor? foil Bulk Metal? high-precision S series?

Vishay Intertechnology Inc. vends an improved S series of high-precision Bulk Metal foil (BMF) resistors, which provide a military-grade typical TCR of 2ppm/C from -55C to +125C, +25C ref., tolerance of 0.005 percent, and load life stability of 0.005 percent for more than 10,000 hours.

The S series comprises 12 model numbers with resistance values from 0.5? to 1M?, with any resistance value available at any tolerance within the resistance range at no additional cost or lead-time effect. The devices are rated for power levels up to 2W at 70C and can withstand ESD in excess of 25kV. Rise time for the S series devices is a nearly immeasurable 1ns without ringing.

Devices in the S series are built to handle unconventional environmental conditional conditions with minimal drift, making them fit for military/space applications according to EEE-INST-002 specifications and MIL-PRF 55182. The ultimate resistor component for analog applications, the construction of S series resistors guarantees a high level of reliability, stable operation in harsh conditions, and high resistance to thermal shock, mechanical shock, and vibrations. Each S series resistor undergoes a short time overload test of 6.25 times the rated power during the manufacturing process.

The new devices are resistant to moisture as well, and are designed with a coating and molding compound that provides water proofing, moisture proofing, and mechanical damping, as well as a path for heat dissipation.

The S series allows designers to achieve much better performance by combining a range of high-precision specifications in a single device. In addition to its low TCR, tolerance, and load life stability values, the S series offers a low voltage coefficient of Typical applications for the S series devices will include DC/DC converters, feedback circuits, and precision amplifiers in test and measurement instrumentation, medical systems, satellites and aerospace systems, commercial and military avionics, weapons systems, audio systems, and high-temperature systems including down-hole drilling.

Both leaded and surface-mount (SMR1D and SMR3D) S series resistors are available now, with lead times of 72hrs for samples, and three weeks for standard orders.

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