RK73H RK73B SR73 Pulse Power RK73H RK73B SR73 Pulse Power dmcgriff

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Specifications	RK73H RK73B SR73 Pulse Power RK73H RK73B SR73 Pulse Power dmcgriff
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tech notes USA814-362-5536814-362-8883FaxBolivar DriveP.O. Box 547Bradford, PA 16701 PAGE 1 WWW.KOASPEER.COM Limitations of P

Specifications	RK73H RK73B SR73 Pulse Power RK73H RK73B SR73 Pulse Power dmcgriff
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Content	tech notes USA814-362-5536814-362-8883FaxBolivar DriveP.O. Box 547Bradford, PA 16701 PAGE 1 WWW.KOASPEER.COM Limitations of Potential Pulsing on Thick Film Flat Chip Resistors KSE types RK73B, RK73H and SR73 Surface mount rectangular flat chip resistors are susceptible to failure under some high voltage conditions. In circuitry where there is a possibility of transient potentials, considerable high voltage may be applied to a resistor for a short period of time. This bulletin is intended to aid the Design Engineer in determining a safe potential level for flat chip resistors in pulse applications. For Pulse Power limitations of KOA thick film chip resistors, please refer to the graph, fig. 1. Power below that specified on the graph will, generally, not cause any significant degradation of the resistor, but note that the resistance value may vary slightly due to repeated pulsing over a long period of time. The circuit designer should also be cognizant of the fact that the pulse voltage is limited even under the conditions on which the graph, fig. 1, is based. The maximum peak pulse voltage for a KOA thick film chip resistor is the lessor of (A) or (B) below. (A) V peak = Po x R Where, Po is the pulse limit power taken from the graph, R is the resistor value in ohms. (B) 1E 1J 2A 2B 2E 2H 3A (0402) (0603) (0805) (1206) (1210) (2010) (2512) Size Size Size Size Size Size Size 100V 100V 300V 400V 400V 400V 400V The peak power is defined as the maximum power dissipated at any point in time regardless of the waveform shape. Po tT off TN-95 8-11
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