High-Pulse Wirewound Resistors


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

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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Wirewound Resistor Technology Pulse Rated Wirewound Resistors LED Lighting and Resistors

UB

Manufacturer Part Number Description Available Quantity Datasheets
UB3C-0R1F1 RES 0.1 OHM 3W 1% AXIAL 40
UB3C-0R2F1 RES 0.2 OHM 3W 1% AXIAL 86
UB3C-0R25F1 RES 0.25 OHM 3W 1% AXIAL 404
UB3C-0R3F1 RES 0.3 OHM 3W 1% AXIAL 228
UB3C-0R33F1 RES 0.33 OHM 3W 1% AXIAL 7677
UB3C-0R5F1 RES 0.5 OHM 3W 1% AXIAL 473
UB3C-1KF1 RES 1K OHM 3W 1% AXIAL 407
UB3C-1RF1 RES 1 OHM 3W 1% AXIAL 851
UB3C-1R5F1 RES 1.5 OHM 3W 1% AXIAL 94
UB3C-1R8F1 RES 1.8 OHM 3W 1% AXIAL 479
UB3C-100RF1 RES 100 OHM 3W 1% AXIAL 395
UB3C-10RF1 RES 10 OHM 3W 1% AXIAL 700
UB3C-120RF1 RES 120 OHM 3W 1% AXIAL 561
UB3C-150RF1 RES 150 OHM 3W 1% AXIAL 491
UB3C-15RF1 RES 15 OHM 3W 1% AXIAL 124
UB3C-180RF1 RES 180 OHM 3W 1% AXIAL 490
UB3C-2RF1 RES 2 OHM 3W 1% AXIAL 235
UB3C-200RF1 RES 200 OHM 3W 1% AXIAL 342
UB3C-20RF1 RES 20 OHM 3W 1% AXIAL 508
UB3C-250RF1 RES 250 OHM 3W 1% AXIAL 536
UB3C-25RF1 RES 25 OHM 3W 1% AXIAL 532
UB3C-3RF1 RES 3 OHM 3W 1% AXIAL 390
UB3C-30RF1 RES 30 OHM 3W 1% AXIAL 104
UB3C-330RF1 RES 330 OHM 3W 1% AXIAL 142
UB3C-33RF1 RES 33 OHM 3W 1% AXIAL 160
UB3C-4RF1 RES 4 OHM 3W 1% AXIAL 141
UB3C-40RF1 RES 40 OHM 3W 1% AXIAL 811
UB3C-5RF1 RES 5 OHM 3W 1% AXIAL 1153
UB3C-5R6F1 RES 5.6 OHM 3W 1% AXIAL 786
UB3C-500RF1 RES 500 OHM 3W 1% AXIAL 1044
UB3C-50RF1 RES 50 OHM 3W 1% AXIAL 806
UB3C-680RF1 RES 680 OHM 3W 1% AXIAL 302
UB3C-7R5F1 RES 7.5 OHM 3W 1% AXIAL 101
UB3C-75RF1 RES 75 OHM 3W 1% AXIAL 1076
UB3C-8R2F1 RES 8.2 OHM 3W 1% AXIAL 973
UB3C-900RF1 RES 900 OHM 3W 1% AXIAL 487
UB5C-0R1F1 RES 0.1 OHM 5W 1% AXIAL 1794
UB5C-0R2F1 RES 0.2 OHM 5W 1% AXIAL 286
UB5C-0R25F1 RES 0.25 OHM 5W 1% AXIAL 1683
UB5C-0R33F1 RES 0.33 OHM 5W 1% AXIAL 316
UB5C-0R5F1 RES 0.5 OHM 5W 1% AXIAL 577
UB5C-1KF1 RES 1K OHM 5W 1% AXIAL 551
UB5C-1RF1 RES 1 OHM 5W 1% AXIAL 888
UB5C-1K5F1 RES 1.5K OHM 5W 1% AXIAL 66
UB5C-1R5F1 RES 1.5 OHM 5W 1% AXIAL 250
UB5C-1R8F1 RES 1.8 OHM 5W 1% AXIAL 494
UB5C-100RF1 RES 100 OHM 5W 1% AXIAL 162
UB5C-10RF1 RES 10 OHM 5W 1% AXIAL 4646
UB5C-120RF1 RES 120 OHM 5W 1% AXIAL 0
UB5C-12RF1 RES 12 OHM 5W 1% AXIAL 754
UB5C-150RF1 RES 150 OHM 5W 1% AXIAL 13
UB5C-15RF1 RES 15 OHM 5W 1% AXIAL 1227
UB5C-180RF1 RES 180 OHM 5W 1% AXIAL 707
UB5C-2KF1 RES 2K OHM 5W 1% AXIAL 56
UB5C-2RF1 RES 2 OHM 5W 1% AXIAL 178
UB5C-200RF1 RES 200 OHM 5W 1% AXIAL 9729
UB5C-20RF1 RES 20 OHM 5W 1% AXIAL 495
UB5C-220RF1 RES 220 OHM 5W 1% AXIAL 0
UB5C-250RF1 RES 250 OHM 5W 1% AXIAL 673
UB5C-25RF1 RES 25 OHM 5W 1% AXIAL 1173
UB5C-3RF1 RES 3 OHM 5W 1% AXIAL 500
UB5C-3R3F1 RES 3.3 OHM 5W 1% AXIAL 704
UB5C-300RF1 RES 300 OHM 5W 1% AXIAL 481
UB5C-30RF1 RES 30 OHM 5W 1% AXIAL 318
UB5C-330RF1 RES 330 OHM 5W 1% AXIAL 12
UB5C-33RF1 RES 33 OHM 5W 1% AXIAL 138
UB5C-4RF1 RES 4 OHM 5W 1% AXIAL 174
UB5C-40RF1 RES 40 OHM 5W 1% AXIAL 479
UB5C-470RF1 RES 470 OHM 5W 1% AXIAL 1395
UB5C-5KF1 RES 5K OHM 5W 1% AXIAL 1141
UB5C-5RF1 RES 5 OHM 5W 1% AXIAL 468
UB5C-5R6F1 RES 5.6 OHM 5W 1% AXIAL 3111
UB5C-500RF1 RES 500 OHM 5W 1% AXIAL 599
UB5C-50RF1 RES 50 OHM 5W 1% AXIAL 294
UB5C-560RF1 RES 560 OHM 5W 1% AXIAL 9097
UB5C-56RF1 RES 56 OHM 5W 1% AXIAL 284
UB5C-75RF1 RES 75 OHM 5W 1% AXIAL 674
UB5C-8R2F1 RES 8.2 OHM 5W 1% AXIAL 2544

S

Manufacturer Part Number Description Available Quantity Datasheets
S2-0R03F3 RES SMD 0.03 OHM 1% 1W 2615 3827
S2-0R05F1 RES SMD 0.05 OHM 1% 1W 2615 2880
S2-0R1F1 RES SMD 0.1 OHM 1% 1W 2615 592
S2-0R2F2 RES SMD 0.2 OHM 1% 1W 2615 1015
S2-0R5F1 RES SMD 0.5 OHM 1% 1W 2615 1933
S2-1RF1 RES SMD 1 OHM 1% 1W 2615 2214
S2-100RF1 RES SMD 100 OHM 1% 1W 2615 1130
S2-10RF2 RES SMD 10 OHM 1% 1W 2615 1008
S2-15RF1 RES SMD 15 OHM 1% 1W 2615 510
S2-2K2F1 RES SMD 2.2K OHM 1% 1W 2615 784
S2-220RF1 RES SMD 220 OHM 1% 1W 2615 608
S2-470RF1 RES SMD 470 OHM 1% 1W 2615 1432
S2-47RF2 RES SMD 47 OHM 1% 1W 2615 572
S2-680RF1 RES SMD 680 OHM 1% 1W 2615 2947
S2-68RF1 RES SMD 68 OHM 1% 1W 2615 2858
S3-0R05F1 RES SMD 0.05 OHM 1% 3W 6327 191
S3-0R1F1 RES SMD 0.1 OHM 1% 3W 6327 622
S3-0R3F1 RES SMD 0.3 OHM 1% 3W 6327 170
S3-0R5F1 RES SMD 0.5 OHM 1% 3W 6327 487
S3-0R75F1 RES SMD 0.75 OHM 1% 3W 6327 267
S3-100RF1 RES SMD 100 OHM 1% 3W 6327 230
S3-10RF1 RES SMD 10 OHM 1% 3W 6327 1951
S3-15KF1 RES SMD 15K OHM 1% 3W 6327 701
S3-150RF1 RES SMD 150 OHM 1% 3W 6327 0
S3-15RF1 RES SMD 15 OHM 1% 3W 6327 37
S3-220RF1 RES SMD 220 OHM 1% 3W 6327 4675
S3-22RF1 RES SMD 22 OHM 1% 3W 6327 922
S3-470RF1 RES SMD 470 OHM 1% 3W 6327 361
S3-47RF1 RES SMD 47 OHM 1% 3W 6327 387
S3-6K8F1 RES SMD 6.8K OHM 1% 3W 6327 1315
S4-0R01F1 RES SMD 0.01 OHM 1% 2W 4525 394
S4-0R02F1 RES SMD 0.02 OHM 1% 2W 4525 2363
S4-0R03F1 RES SMD 0.03 OHM 1% 2W 4525 1375
S4-0R05F1 RES SMD 0.05 OHM 1% 2W 4525 1328
S4-0R2F2 RES SMD 0.2 OHM 1% 2W 4525 1023
S4-1RF1 RES SMD 1 OHM 1% 2W 4525 1671
S4-100RF1 RES SMD 100 OHM 1% 2W 4525 703
S4-10RF1 RES SMD 10 OHM 1% 2W 4525 2397
S4-15KF1 RES SMD 15K OHM 1% 2W 4525 463
S4-150RF1 RES SMD 150 OHM 1% 2W 4525 70
S4-15RF1 RES SMD 15 OHM 1% 2W 4525 1358
S4-22RF1 RES SMD 22 OHM 1% 2W 4525 892
S4-470RF1 RES SMD 470 OHM 1% 2W 4525 2775
S5-0R01F3 RES SMD 0.01 OHM 1% 4W 8230 427
S5-0R05F1 RES SMD 0.05 OHM 1% 4W 8230 108
S5-1RF1 RES SMD 1 OHM 1% 4W 8230 750
S5-10KF1 RES SMD 10K OHM 1% 4W 8230 261
S5-100RF2 RES SMD 100 OHM 1% 4W 8230 2678
S5-22KF1 RES SMD 22K OHM 1% 4W 8230 529
S5-2K2F1 RES SMD 2.2K OHM 1% 4W 8230 202
S5-220RF1 RES SMD 220 OHM 1% 4W 8230 313
S5-22RF1 RES SMD 22 OHM 1% 4W 8230 937
S5-470RF1 RES SMD 470 OHM 1% 4W 8230 1487
S5-47RF1 RES SMD 47 OHM 1% 4W 8230 60
S5-6K8F1 RES SMD 6.8K OHM 1% 4W 8230 621
S5-680RF1 RES SMD 680 OHM 1% 4W 8230 1560
S5-68RF1 RES SMD 68 OHM 1% 4W 8230 1386

UAL

Manufacturer Part Number Description Available Quantity Datasheets
UAL25-0R5F8 RES CHAS MNT 0.5 OHM 1% 25W 95
UAL25-1K5F8 RES CHAS MNT 1.5K OHM 1% 25W 111
UAL25-750RF8 RES CHAS MNT 750 OHM 1% 25W 36
UAL25-7R5F8 RES CHAS MNT 7.5 OHM 1% 25W 50
UAL50-15RF8 RES CHAS MNT 15 OHM 1% 50W 140
UAL50-200RF8 RES CHAS MNT 200 OHM 1% 50W 235
UAL50-25KF8 RES CHAS MNT 25K OHM 1% 50W 38
UAL50-25RF8 RES CHAS MNT 25 OHM 1% 50W 114
UAL50-330RF8 RES CHAS MNT 330 OHM 1% 50W 0
UAL50-3RF8 RES CHAS MNT 3 OHM 1% 50W 50
UAL5-15RF8 RES CHAS MNT 15 OHM 1% 7.5W 78
UAL5-40RF8 RES CHAS MNT 40 OHM 1% 7.5W 25
UAL5-50RF8 RES CHAS MNT 50 OHM 1% 7.5W 47
UAL5-7R5F8 RES CHAS MNT 7.5 OHM 1% 7.5W 28
UAL10-15KF8 RES CHAS MNT 15K OHM 1% 12.5W 54
UAL10-1KF8 RES CHAS MNT 1K OHM 1% 12.5W 46
UAL10-20KF8 RES CHAS MNT 20K OHM 1% 12.5W 66
UAL10-2R5F8 RES CHAS MNT 2.5 OHM 1% 12.5W 226
UAL10-2RF8 RES CHAS MNT 2 OHM 1% 12.5W 114
UAL10-300RF8 RES CHAS MNT 300 OHM 1% 12.5W 72
UAL10-500RF8 RES CHAS MNT 500 OHM 1% 12.5W 105
UAL10-50RF8 RES CHAS MNT 50 OHM 1% 12.5W 13
UAL10-5RF8 RES CHAS MNT 5 OHM 1% 12.5W 79
UAL10-75RF8 RES CHAS MNT 75 OHM 1% 12.5W 38
UAL25-10KF8 RES CHAS MNT 10K OHM 1% 25W 92
UAL25-15RF8 RES CHAS MNT 15 OHM 1% 25W 47
UAL25-200RF8 RES CHAS MNT 200 OHM 1% 25W 117
UAL25-20RF8 RES CHAS MNT 20 OHM 1% 25W 91
UAL25-250RF8 RES CHAS MNT 250 OHM 1% 25W 69
UAL25-25KF8 RES CHAS MNT 25K OHM 1% 25W 68
UAL25-25RF8 RES CHAS MNT 25 OHM 1% 25W 57
UAL25-2RF8 RES CHAS MNT 2 OHM 1% 25W 64
UAL25-300RF8 RES CHAS MNT 300 OHM 1% 25W 75
UAL25-500RF8 RES CHAS MNT 500 OHM 1% 25W 374
UAL25-50RF8 RES CHAS MNT 50 OHM 1% 25W 75
UAL25-5KF8 RES CHAS MNT 5K OHM 1% 25W 137
UAL25-75RF8 RES CHAS MNT 75 OHM 1% 25W 130
UAL50-0R15F8 RES CHAS MNT 0.15 OHM 1% 50W 49
UAL50-0R25F8 RES CHAS MNT 0.25 OHM 1% 50W 234
UAL50-0R3F8 RES CHAS MNT 0.3 OHM 1% 50W 61
UAL50-100RF8 RES CHAS MNT 100 OHM 1% 50W 169
UAL50-10KF8 RES CHAS MNT 10K OHM 1% 50W 34
UAL50-12RF8 RES CHAS MNT 12 OHM 1% 50W 293
UAL50-150RF8 RES CHAS MNT 150 OHM 1% 50W 0
UAL50-15KF8 RES CHAS MNT 15K OHM 1% 50W 26
UAL50-1KF8 RES CHAS MNT 1K OHM 1% 50W 40
UAL50-1R5F8 RES CHAS MNT 1.5 OHM 1% 50W 84
UAL50-20KF8 RES CHAS MNT 20K OHM 1% 50W 77
UAL50-250RF8 RES CHAS MNT 250 OHM 1% 50W 30
UAL50-2K5F8 RES CHAS MNT 2.5K OHM 1% 50W 71
UAL50-2R5F8 RES CHAS MNT 2.5 OHM 1% 50W 133
UAL50-2RF8 RES CHAS MNT 2 OHM 1% 50W 89
UAL50-40RF8 RES CHAS MNT 40 OHM 1% 50W 0
UAL50-500RF8 RES CHAS MNT 500 OHM 1% 50W 0
UAL50-5KF8 RES CHAS MNT 5K OHM 1% 50W 79
UAL50-8RF8 RES CHAS MNT 8 OHM 1% 50W 364
UAL5-0R1F8 RES CHAS MNT 0.1 OHM 1% 7.5W 47
UAL5-100RF8 RES CHAS MNT 100 OHM 1% 7.5W 86
UAL5-10KF8 RES CHAS MNT 10K OHM 1% 7.5W 91
UAL5-10RF8 RES CHAS MNT 10 OHM 1% 7.5W 38
UAL5-15KF8 RES CHAS MNT 15K OHM 1% 7.5W 50
UAL5-1KF8 RES CHAS MNT 1K OHM 1% 7.5W 110
UAL5-20KF8 RES CHAS MNT 20K OHM 1% 7.5W 0
UAL5-25RF8 RES CHAS MNT 25 OHM 1% 7.5W 11
UAL5-300RF8 RES CHAS MNT 300 OHM 1% 7.5W 52
UAL5-30RF8 RES CHAS MNT 30 OHM 1% 7.5W 59
UAL5-500RF8 RES CHAS MNT 500 OHM 1% 7.5W 197
UAL10-100RF8 RES CHAS MNT 100 OHM 1% 12.5W 28
UAL10-10RF8 RES CHAS MNT 10 OHM 1% 12.5W 754
UAL10-2KF8 RES CHAS MNT 2K OHM 1% 12.5W 32
UAL10-35RF8 RES CHAS MNT 35 OHM 1% 12.5W 73
UAL10-750RF8 RES CHAS MNT 750 OHM 1% 12.5W 54
UAL25-0R1F8 RES CHAS MNT 0.1 OHM 1% 25W 52
UAL25-100RF8 RES CHAS MNT 100 OHM 1% 25W 14
UAL25-10RF8 RES CHAS MNT 10 OHM 1% 25W 77
UAL25-1KF8 RES CHAS MNT 1K OHM 1% 25W 47
UAL25-2KF8 RES CHAS MNT 2K OHM 1% 25W 88
UAL25-3RF8 RES CHAS MNT 3 OHM 1% 25W 58
UAL25-40RF8 RES CHAS MNT 40 OHM 1% 25W 74
UAL25-5RF8 RES CHAS MNT 5 OHM 1% 25W 25
UAL50-0R1F8 RES CHAS MNT 0.1 OHM 1% 50W 71
UAL50-0R5F8 RES CHAS MNT 0.5 OHM 1% 50W 84
UAL50-100KF8 RES CHAS MNT 100K OHM 1% 50W 158
UAL50-10RF8 RES CHAS MNT 10 OHM 1% 50W 101
UAL50-16RF8 RES CHAS MNT 16 OHM 1% 50W 203
UAL50-1RF8 RES CHAS MNT 1 OHM 1% 50W 59
UAL50-20RF8 RES CHAS MNT 20 OHM 1% 50W 0
UAL50-300RF8 RES CHAS MNT 300 OHM 1% 50W 82
UAL50-30RF8 RES CHAS MNT 30 OHM 1% 50W 26
UAL50-3R3F8 RES CHAS MNT 3.3 OHM 1% 50W 164
UAL50-50KF8 RES CHAS MNT 50K OHM 1% 50W 53
UAL50-50RF8 RES CHAS MNT 50 OHM 1% 50W 49
UAL50-5RF8 RES CHAS MNT 5 OHM 1% 50W 454
UAL50-6RF8 RES CHAS MNT 6 OHM 1% 50W 74
UAL50-75RF8 RES CHAS MNT 75 OHM 1% 50W 198
UAL5-0R5F8 RES CHAS MNT 0.5 OHM 1% 7.5W 572
UAL5-150RF8 RES CHAS MNT 150 OHM 1% 7.5W 66
UAL5-1RF8 RES CHAS MNT 1 OHM 1% 7.5W 80
UAL5-390RF8 RES CHAS MNT 390 OHM 1% 7.5W 100
UAL50-0R2F8 RES CHAS MNT 0.2 OHM 1% 50W 5