BCcomponents achieved a world-first in the passive component industry when it introduced its range of ultra-precision thin-film Mini-MELF resistors targeted for use in high-accuracy, high-performance applications such as test and measurement equipment, process control instrumentation and aerospace electronics.
The company's UMA 0204 Mini-MELF resistors are available with tolerance values as low as ±0,02% and temperature coefficients as small as 5 ppm/K. These resistors bring the advantages of space-saving surface-mount components to applications where accuracy, stability and lifetime are important design parameters.
Designers can replace existing metal-foil resistors with a smaller and lower-cost thin-film solution, according to the manufacturer. When determining the total error budget for precision resistors, their initial tolerance and temperature coefficient are only part of the story. Designers must also take into account the long-term drift in ohmic value due to ageing. This is particularly important in applications where a very long lifetime is required or where the component cannot easily be replaced. BCcomponents says that this is also an important factor in the automotive electronics industry, where there is an increasing need to build modules that are capable of withstanding ever higher ambient temperatures, but at the same time are required to stay within pre-determined stability and precision requirements.
For a continuous power dissipation of 0,07 W, BCcomponents guarantees its UMA 0204 resistors will drift no more than 1200 ppm (0,12%) during their minimum specified lifetime of 25 years. Even at their maximum rated power dissipation of 0,25 W, long term drift is guaranteed not to exceed 0,3%.
UMA 0204 resistors are available with tolerances ±0,02, ±0,05, ±0,1 and ±0,25%, and temperature coefficients of 5, 10 and 15 ppm/K. The standard range includes all E192 values between 22 W and 221 kW, others on special order.
SMT flat-wire inductor for automotive electronics Würth Electronics South Africa
Passive Components
Würth Elektronik introduces its new WE-SFIA series of flat-wire inductors in 2010, 2013, and 2016 packages.
Read more...Nanocrystalline cores for cable assembly Würth Electronics South Africa
Passive Components
Conventional MnZn and NiZn ferrite cores for cable assembly are now complemented by nanocrystalline cable cores.
Read more...Cooling solutions for modern electronics Future Electronics
Passive Components
As electronic systems become more compact and powerful, effective thermal management has become a critical aspect of product design.
Read more...DC-link capacitors with ultra-low inductance Electrocomp
Passive Components
TDK Corporation recently released its new series of MKP DC high-frequency film capacitors, a high-performance DC link capacitor platform for next-generation SiC-based power electronics.
Read more...Generating negative voltages from a positive supply Altron Arrow
Editor's Choice Passive Components
It is common for IoT devices, industrial sensors, meters, and medical equipment to require both a positive and negative voltage, and this article explains the options available to produce a negative rail from a positive rail supply.
Read more...Non-contact linear position sensor Electrocomp
Test & Measurement
The Vishay 40 LHE Linear Position Sensor, designed for industrial motion control and automation, delivers robust, non-contact measurement performance using Hall effect technology.
Read more...High-precision thick-film resistors Avnet Silica
Passive Components
The new Panasonic ERJPC high precision thick-film resistors series deliver accuracy levels previously only achievable with thin film technology, offering customers higher power density and cost-effective performance.
Read more...Semi-shielded power inductors RS South Africa
Passive Components
The SDCx family from Eaton includes the SDCL and SDCH series of semi-shielded power inductors designed for reliable performance in consumer, industrial, energy, and medical applications.
Read more...Compact high-current power inductor EBV Electrolink
Passive Components
Vishay’s IHLP series power inductors deliver high current capability in an ultra-low profile, magnetically shielded design.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version