Passive Components


Precision resistors

18 August 2010 Passive Components

Vishay has announced a new series of high-precision Bulk Metal Z-Foil resistors built using Z1-Foil technology that features enhanced accuracy, stability and fast thermal stabilisation in sizes small enough for permanent assembly in operational equipment.

The SMR3P devices feature a TCR of ±0,5 ppm/°C maximum (+25°C to


+125°C), tolerances to 0,01%, load-life stability of ±0,005% (50 ppm) after 10 000 hours with 0,6 W at 70°C, and PCR (ΔR due to self-heating) of ±5 ppm at a rated power of 0,6 W at +70°C or 0,3 W at +125°C.

The SMR3P series is targeted at feedback devices for operational amplifiers, precision voltage dividers, precision bridge resistors and decade voltage dividers in precision amplifiers; high-precision instrumentation; medical, industrial, high-end stereo and automatic test equipment; electron beam and pulse applications; and measurement instrumentation.

Chips of 1206 and larger dimensions occasionally delaminate from the PCB or develop cracks due to the stresses introduced by handling of the PCB and thermal shock. The SMR3P features a moulded package with flexible terminations that ensure minimal stress transference from the PCB due to load-induced temperature gradients and a difference in thermal coefficient of expansion (TCE). The SMR3P’s low absolute TCR reduces errors due to temperature gradients, thus reducing a major source of uncertainty in precision circuits. The resistors can withstand unconventional environmental conditions, including the extremely high temperatures and radiation-rich environments of down-hole oil exploration and well logging, or the deep-sea underwater repeaters in cross-ocean communications.

The SMR3P series features electrostatic discharge (ESD) immunity up to 25 000 V, a thermal stabilisation time of <1 second (nominal value achieved within 10 ppm of steady-state value), current noise of 0,010 μVRMS/V of applied voltage (<-40 dB) and a voltage coefficient of <0,1 ppm/V. The devices offer a resistance range of 100 Ω to 15 kΩ. Vishay Foil resistors are not restricted to standard values, and can be supplied with ‘as required’ values (eg, 1,0002 kΩ vs. 1 kΩ) at no extra cost or delivery time. The resistors offer a non-inductive


(< 0,08 μH), non-capacitive design and feature lead-free or tin/lead alloy terminal finishes.

For more information contact Marian Ledgerwood, Future Electronics, +27 (0)21 421 8292, [email protected], www.futureelectronics.com



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Easy installation panel mount assembly
Future Electronics Enclosures, Racks, Cabinets & Panel Products
NKK’s new easy installation Panel Mount Assembly (the BYB201-470) consists of a PCB, resistor, connector, and a straight PC adaptor.

Read more...
Microchip enhances digital signal controller lineup
Future Electronics DSP, Micros & Memory
Microchip Technology has added the dsPIC33AK512MPS512 and dsPIC33AK512MC510 Digital Signal Controller families to its dsPIC33A DSC product line.

Read more...
Cutting-edge hybrid capacitors
Avnet Silica Passive Components
Panasonic Industry recently announced the launch of the ZVU Series Hybrid Capacitors, a cutting-edge solution tailored to meet the escalating demands of advanced electronic systems.

Read more...
Low-profile tantalum chip capacitors
Electrocomp Passive Components
These general-purpose tantalum capacitors from Kyocera AVX are available in multiple case sizes with low profile options.

Read more...
PhotoMOS relays
Future Electronics Opto-Electronics
The AQY221R2SX and AQY221R2S PhotoMOS from Panasonic Industry ensures excellent characteristics and high-speed switching performance.

Read more...
Coupled inductor for high-performance applications
Passive Components
This coil with MnZn core is characterised by its high permeability and extremely low RDC values, which achieves excellent power density and very high efficiency.

Read more...
MEMS air quality sensor
Future Electronics Test & Measurement
Bosch Sensortec’s BME690 is the latest-generation gas sensor that combines advanced monitoring capabilities with innovative artificial intelligence functionality.

Read more...
Power inductors
iCorp Technologies Passive Components
he HTF-MP series is more suitable for complex multiphase power supply applications in design, effectively meeting the needs of ultra-thin and high-power devices.

Read more...
SMT power inductors
Future Electronics Passive Components
The Würth Elektronik WE-MXGI SMT power inductors are the latest addition to Würth Elektronik’s moulded power inductor series, engineered for high-frequency power applications.

Read more...
Large capacitance MLCCs at 100 V
RS South Africa Passive Components
TDK Corporation has expanded its CGA series for automotive multilayer ceramic capacitors to 10 µF at 100 V in 3225 size.

Read more...









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.




© Technews Publishing (Pty) Ltd | All Rights Reserved