The DNR20D681K is OXIDE VARISTOR made by DNR.
Brief overview of the content in a DNR20D681K PDF file
OXIDE VARISTORS 1 PART NUMBER CODE DNR D K Lead form S Straight lead K Kinked lead Packing R Reel packing B Bulk packing A Ammo box packing Tolerance K 10 M 20 Voltage of Varistor Series No Element diameter Symbol of DON S VARISTORS CHARACTERISTICS DNR has the forward reverse symmetrical electrical characteristics shown in the Fig 1 The curve is plotted for a wider range of current than that normally give in data sheet to show three regions the Fog 2 http www datasheetgo.com OXIDE VARISTOR 20D Series Part Number Maximum Allowable Voltage Acrms DC V V 11 14 17 20 25 30 35 40 50 60 75 95 115 130 140 150 175 190 210 230 250 275 300 320 350 385 420 460 485 510 550 625 680 1000 14 18 22 26 31 38 45 56 65 85 100 125 150 170 180 200 225 250 275 300 320 350 385 415 460 505 560 615 640 670 745 825 895 1465 Varistor Voltage V 1mA V 18 16 20 22 20 24 27 24 30 33 30 36 39 35 43 47 42 52 56 50 62 68 61 75 82 74 90 100 90 110 120 108 132 150 135 165 180 162 198 200 185 225 220 198 242 240 216 264 270 243 297 300 270 330 330 297 363 360 324 396 390 351 429 430 387 473 470 423 517 510 459 561 560 504 616 620 558 682 680 612 748 750 675 825 780 702 858 820 738 902 910 819 1001 1000 900 11
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The basic structure of a varistor consists of a ceramic or metal oxide material with a nonlinear resistance characteristic. When the voltage across the varistor reaches a certain threshold, its resistance decreases sharply, allowing a large current to flow through it and diverting the excess voltage away from the device it is protecting. Varistors are commonly used in electronic circuits to protect against power surges, lightning strikes, and other voltage spikes that can damage sensitive components. They are also used in power distribution systems, where they help to protect transformers, motors, and other equipment from overvoltage events. There are two main types of varistors: silicon carbide (SiC) and zinc oxide (ZnO). SiC varistors are commonly used in high-power applications, such as power distribution systems and industrial equipment, while ZnO varistors are used in lower power applications, such as consumer electronics and telecommunications. Manufacturers : DNR  |
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