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 ResistorsLike 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 QuantityBuy Now
RES SMD 47 OHM 1% 1W 2615S2-47RF2RES SMD 47 OHM 1% 1W 26154172 - Immediate
RES SMD 100 OHM 1% 1W 2615S2-100RF1RES SMD 100 OHM 1% 1W 26152170 - Immediate
RES SMD 220 OHM 1% 3W 6327S3-220RF1RES SMD 220 OHM 1% 3W 63273385 - Immediate
RES SMD 0.03 OHM 1% 1W 2615S2-0R03F3RES SMD 0.03 OHM 1% 1W 26153827 - Immediate
RES SMD 1 OHM 1% 2W 4525S4-1RF1RES SMD 1 OHM 1% 2W 45251665 - Immediate
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UAL Series Resistors
ImageManufacturer Part NumberDescriptionAvailable QuantityBuy Now
RES CHAS MNT 500 OHM 1% 25WUAL25-500RF8RES CHAS MNT 500 OHM 1% 25W334 - Immediate
RES CHAS MNT 200 OHM 1% 50WUAL50-200RF8RES CHAS MNT 200 OHM 1% 50W544 - Immediate
RES CHAS MNT 12 OHM 1% 50WUAL50-12RF8RES CHAS MNT 12 OHM 1% 50W425 - Immediate
RES CHAS MNT 5 OHM 1% 50WUAL50-5RF8RES CHAS MNT 5 OHM 1% 50W411 - Immediate
RES CHAS MNT 6 OHM 1% 50WUAL50-6RF8RES CHAS MNT 6 OHM 1% 50W301 - Immediate
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UB Series Resistors
ImageManufacturer Part NumberDescriptionAvailable QuantityBuy Now
RES 5 OHM 3W 1% AXIALUB3C-5RF1RES 5 OHM 3W 1% AXIAL1103 - Immediate
RES 200 OHM 5W 1% AXIALUB5C-200RF1RES 200 OHM 5W 1% AXIAL8638 - Immediate
RES 10 OHM 5W 1% AXIALUB5C-10RF1RES 10 OHM 5W 1% AXIAL3488 - Immediate
RES 8.2 OHM 5W 1% AXIALUB5C-8R2F1RES 8.2 OHM 5W 1% AXIAL2425 - Immediate
RES 25 OHM 5W 1% AXIALUB5C-25RF1RES 25 OHM 5W 1% AXIAL2070 - Immediate
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Published: 2014-04-02