High-Pulse Wirewound Resistors

Riedon's high-pulse wirewound resistors offer significant advantages over alternatives in many applications

Image of Riedon's High-Pulse Wirewound ResistorsRiedon’s wirewound resistors, with their high-power rating and high-temperature rating, are also easy to customize. Like every component, the fabrication technology used in resistor manufacture has changed over time, and resistive films have made a significant contribution in allowing the cost-effective mass production of devices that are increasingly miniaturized. Yet the traditional wirewound resistor, despite a substantial decline in the number of manufacturers of this component in recent decades, remains the best solution for many specialized applications.

One reason for the survival of wirewound resistors is that all of the alternative fabrication techniques have drawbacks. For example, the use of conductive inks to produce carbon film, or thick-film resistors can produce very-low-cost components; but the resulting devices have limited pulse handling, no better than 0.1% initial tolerance and poor long-term stability, typically 500 to 1,000 ppm/year. The resistance is temperature dependent, with a temperature coefficient of resistance (TCR) of around 50 to 100 ppm/°C. Moreover, relatively-high-current noise of -18 dB to -10 dB is typical, where: dB = 20 x log (noise voltage [in μV]/DC voltage [in V]).

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S Series Resistors

ImageManufacturer Part NumberDescriptionAvailable Quantity
S2-100RF1 datasheet linkRES SMD 100 OHM 1% 1W 2615S2-100RF1RES SMD 100 OHM 1% 1W 26158193 - Immediate
S2-100RF1 product page link
S4-10RF1 datasheet linkRES SMD 10 OHM 1% 2W 4525S4-10RF1RES SMD 10 OHM 1% 2W 45252139 - Immediate
S4-10RF1 product page link
S3-220RF1 datasheet linkRES SMD 220 OHM 1% 3W 6327S3-220RF1RES SMD 220 OHM 1% 3W 63272549 - Immediate
S3-220RF1 product page link
S5-1RF1 datasheet linkRES SMD 1 OHM 1% 4W 8230S5-1RF1RES SMD 1 OHM 1% 4W 82304650 - Immediate
S5-1RF1 product page link
S5-100RF2 datasheet linkRES SMD 100 OHM 1% 4W 8230S5-100RF2RES SMD 100 OHM 1% 4W 82302094 - Immediate
S5-100RF2 product page link
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UAL Series Resistors

ImageManufacturer Part NumberDescriptionAvailable Quantity
UAL25-200RF8 datasheet linkRES CHAS MNT 200 OHM 1% 25WUAL25-200RF8RES CHAS MNT 200 OHM 1% 25W461 - Immediate
UAL25-200RF8 product page link
UAL25-500RF8 datasheet linkRES CHAS MNT 500 OHM 1% 25WUAL25-500RF8RES CHAS MNT 500 OHM 1% 25W219 - Immediate
UAL25-500RF8 product page link
UAL25-7R5F8 datasheet linkRES CHAS MNT 7.5 OHM 1% 25WUAL25-7R5F8RES CHAS MNT 7.5 OHM 1% 25W122 - Immediate
UAL25-7R5F8 product page link
UAL25-25RF8 datasheet linkRES CHAS MNT 25 OHM 1% 25WUAL25-25RF8RES CHAS MNT 25 OHM 1% 25W122 - Immediate
UAL25-25RF8 product page link
UAL50-6RF8 datasheet linkRES CHAS MNT 6 OHM 1% 50WUAL50-6RF8RES CHAS MNT 6 OHM 1% 50W887 - Immediate
UAL50-6RF8 product page link
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UB Series Resistors

ImageManufacturer Part NumberDescriptionAvailable Quantity
UB5C-10RF1 datasheet linkRES 10 OHM 5W 1% AXIALUB5C-10RF1RES 10 OHM 5W 1% AXIAL5130 - Immediate
UB5C-10RF1 product page link
UB3C-0R1F1 datasheet linkRES 0.1 OHM 3W 1% AXIALUB3C-0R1F1RES 0.1 OHM 3W 1% AXIAL4935 - Immediate
UB3C-0R1F1 product page link
UB3C-1RF1 datasheet linkRES 1 OHM 3W 1% AXIALUB3C-1RF1RES 1 OHM 3W 1% AXIAL1736 - Immediate
UB3C-1RF1 product page link
UB5C-220RF1 datasheet linkRES 220 OHM 5W 1% AXIALUB5C-220RF1RES 220 OHM 5W 1% AXIAL10425 - Immediate
UB5C-220RF1 product page link
UB5C-200RF1 datasheet linkRES 200 OHM 5W 1% AXIALUB5C-200RF1RES 200 OHM 5W 1% AXIAL6019 - Immediate
UB5C-200RF1 product page link
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Published: 2014-04-02