mobile | classic
Dataweek Electronics & Communications Technology Magazine





Follow us on:
Follow us on Facebook Share via Twitter Share via LinkedIn


Search...

Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


 

Ultra-precision Mini-MELF resistors, designed for stability and accuracy
29 August 2001, Passive Components

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.

Available with tolerance values as low as ±0,02% and temperature coefficients as small as 5 ppm/K, UMA 0204 Mini-MELF resistors bring all the advantages of space-saving surface-mount components to applications where accuracy, stability and lifetime are important design parameters.

"Precision resistors are critical to the performance of a wide range of transducers and measurement circuits," said Joachim von der Ohe, Product Manager. "With the introduction of our ultra-precision UMA 0204 resistors, designers can replace existing metal-foil resistors with a smaller and lower-cost thin-film solution."

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, such as in space satellites, he says. It 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, UMA 0204 resistors are guaranteed to 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%. The failure rate for UMA 0204 resistors is less than 0,7 x 10-9/h.

UMA 0204 resistors are available with initial tolerances of ±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, with other values available to special order.


Credit(s)
Supplied By: Electrocomp
Tel: +27 11 458 9000
Fax: +27 11 458 9034/5
Email: andrew@electrocomp.co.za
www: www.electrocomp.co.za
  Share on Facebook Share via Twitter Share via LinkedIn    

Further reading:

  • Sealed enclosures for industrial electronics
    26 June 2019, Electrocomp, Enclosures, Racks, Cabinets & Panel Products
    Hammond Manufacturing has added 36 new configurations to its 1554 and 1555 sealed enclosure families for Industry 4.0. Available in ABS or polycarbonate with styled, opaque, clear or smoked lids, the ...
  • Consumer grade power inductors
    26 June 2019, Electrocomp, Passive Components
    Bourns is introducing the Model SRP7028C, SRP1038C and SRP1770C high-current shielded power inductor series, designed to meet today’s high current density requirements in various types of consumer electronics ...
  • High-current shielded power inductors
    26 June 2019, Electrocomp, Passive Components
    The inductive components product line at Bourns has created the Model SRP5050FA and Model SRP7030CA high-current shielded power inductor series, designed to meet today’s high current density requirements ...
  • Shielded power inductors
    26 June 2019, RF Design, Passive Components
    High-temperature power inductors from Coilcraft are available with inductance values from 22 to 47 µH, current ratings up to 5,5 A, and low direct current resistance (DCR). The inductors in the XAL7050 ...
  • Miniaturised CO2 sensor
    29 May 2019, Electrocomp, Analogue, Mixed Signal, LSI
    Thanks to new energy standards and better insulation, buildings have become increasingly energy efficient, but at the cost of accelerated deterioration in air quality. Since high CO2 levels compromise ...
  • PPTC resettable fuses
    29 May 2019, Electrocomp, Circuit & System Protection
    The Bourns Multifuse product line has added the new 8 V and 6 V rated Model MF-FSML/X series of low-resistance, surface-mount polymer positive temperature coefficient (PPTC) resettable fuses. The new ...
  • High-power resettable fuses
    29 May 2019, Electrocomp, Circuit & System Protection
    Bourns has introduced its new 3425 (8764 metric) size, surface-mount MF-GSMF series of Multifuse polymer PTC resettable fuses, beginning with model MF-GSMF300/36X-2. The initial model has higher voltage ...
  • Automotive qualified chip resistors
    29 May 2019, Electrocomp, Passive Components
    Bourns announced the introduction of its new sulphur-resistant, AEC-Q200 compliant thick film chip resistor series. The new Model CRxxxxA-AS series is available in eight different footprints from small ...
  • Is the supply chain broken?
    30 April 2019, Electrocomp, Diel Met Systems, ExecuKit, NuVision Electronics, RF Design, This Week's Editor's Pick, News
    The world’s insatiable demand for electronic goods has created a monster: a supply chain that spans the globe and relies on the entirety of our collective knowledge and experience in the pursuit of industry.
  • Inductor learning kit
    30 April 2019, Würth Elektronik eiSos, Passive Components
    Co-developed by Würth Elektronik eiSos and Texas Instruments, the TI-PMLK Buck Würth Elektronik Edition is a learning kit to autonomously study the impact of magnetics in a power supply using a buck board ...
  • Hybrid over-voltage protectors
    30 April 2019, Electrocomp, Circuit & System Protection
    The brand new GMOV line of over-voltage protection components from Bourns combines the company’s patented, space-saving FLAT gas discharge tube (GDT) technology with a metal oxide varistor (MOV) to create ...
  • Stacked patch antenna for GNSS
    30 April 2019, Electrocomp, Telecoms, Datacoms, Wireless, IoT
    Molex’s high-accuracy stacked patch GNSS (global navigation satellite system) antenna features a 50 Ω impedance rating, 2 W RF power rating, and below -10 dB return loss. It offers optimised signal processing ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronics Buyers’ Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    Classic | Mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.