Product category:
Resistors
News Release from: Compstock Group | Subject: Welwyn PWC series
Edited by the Electronicstalk Editorial
Team on 09 January 2002
Chip resistors offer high pulse
withstand
Available now from Stewart Electronics, part of the Compstock Group, is the Welwyn PWC series of pulse withstanding chip resistors.
Available now from Stewart Electronics, part of the Compstock Group, is the Welwyn PWC series of pulse withstanding chip resistors Applications vary from line protection for telecommunications equipment to surge withstanding resistors for use in circuit breakers
This article was originally published on Electronicstalk on 10 Dec 2001 at 8.00am (UK)
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Developed from the ground up as surface-mount devices, rather than as modifications to existing leaded components, the PWC series is available in four standard sizes from 0805 to 2512 with respective power ratings from 125mW to 1.5W.
Each size features a resistance range from 1ohm to 10Mohm with tolerances from 0.5 to 5%.
The enhanced performance of the chips is made possible by the precise use of top-quality resistance inks and a closely controlled production process.
All devices are tested in accordance with IEC 60 115-1 using both 1.2/50 and 10/700us pulse shapes.
The limit of acceptance is a shift in resistance of less than 1% from the initial value.
The thick-film resistor material, overglaze and organic protection layer are screen printed on a 96% alumina substrate.
The wrap-around terminations have an electroplated nickel barrier and tin-lead solder coating to ensure excellent leach-resistance properties and a high degree of solderability.
Chips can withstand immersion in solder at 260C for 30s.
Standard operating temperature range is a wide -55 to +155C.
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