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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Pulse Rated Wirewound Resistors Wirewound Resistor Technology LED Lighting and Resistors

UB

Manufacturer Part Number Description Available Quantity Datasheets
UB3C-0R1F1 RES 0.1 OHM 3W 1% AXIAL 319
UB3C-0R2F1 RES 0.2 OHM 3W 1% AXIAL 160
UB3C-0R25F1 RES 0.25 OHM 3W 1% AXIAL 104
UB3C-0R3F1 RES 0.3 OHM 3W 1% AXIAL 628
UB3C-0R33F1 RES 0.33 OHM 3W 1% AXIAL 7732
UB3C-0R5F1 RES 0.5 OHM 3W 1% AXIAL 503
UB3C-1KF1 RES 1K OHM 3W 1% AXIAL 493
UB3C-1RF1 RES 1 OHM 3W 1% AXIAL 1383
UB3C-1R5F1 RES 1.5 OHM 3W 1% AXIAL 152
UB3C-1R8F1 RES 1.8 OHM 3W 1% AXIAL 301
UB3C-100RF1 RES 100 OHM 3W 1% AXIAL 582
UB3C-10RF1 RES 10 OHM 3W 1% AXIAL 443
UB3C-120RF1 RES 120 OHM 3W 1% AXIAL 647
UB3C-150RF1 RES 150 OHM 3W 1% AXIAL 326
UB3C-15RF1 RES 15 OHM 3W 1% AXIAL 157
UB3C-180RF1 RES 180 OHM 3W 1% AXIAL 75
UB3C-2RF1 RES 2 OHM 3W 1% AXIAL 59
UB3C-200RF1 RES 200 OHM 3W 1% AXIAL 368
UB3C-20RF1 RES 20 OHM 3W 1% AXIAL 153
UB3C-250RF1 RES 250 OHM 3W 1% AXIAL 101
UB3C-25RF1 RES 25 OHM 3W 1% AXIAL 101
UB3C-3RF1 RES 3 OHM 3W 1% AXIAL 486
UB3C-30RF1 RES 30 OHM 3W 1% AXIAL 127
UB3C-330RF1 RES 330 OHM 3W 1% AXIAL 177
UB3C-33RF1 RES 33 OHM 3W 1% AXIAL 225
UB3C-4RF1 RES 4 OHM 3W 1% AXIAL 231
UB3C-40RF1 RES 40 OHM 3W 1% AXIAL 358
UB3C-5RF1 RES 5 OHM 3W 1% AXIAL 1542
UB3C-5R6F1 RES 5.6 OHM 3W 1% AXIAL 467
UB3C-500RF1 RES 500 OHM 3W 1% AXIAL 473
UB3C-50RF1 RES 50 OHM 3W 1% AXIAL 0
UB3C-680RF1 RES 680 OHM 3W 1% AXIAL 322
UB3C-7R5F1 RES 7.5 OHM 3W 1% AXIAL 114
UB3C-75RF1 RES 75 OHM 3W 1% AXIAL 186
UB3C-8R2F1 RES 8.2 OHM 3W 1% AXIAL 986
UB3C-900RF1 RES 900 OHM 3W 1% AXIAL 43
UB5C-0R1F1 RES 0.1 OHM 5W 1% AXIAL 1727
UB5C-0R2F1 RES 0.2 OHM 5W 1% AXIAL 610
UB5C-0R25F1 RES 0.25 OHM 5W 1% AXIAL 466
UB5C-0R33F1 RES 0.33 OHM 5W 1% AXIAL 612
UB5C-0R5F1 RES 0.5 OHM 5W 1% AXIAL 0
UB5C-1KF1 RES 1K OHM 5W 1% AXIAL 1192
UB5C-1RF1 RES 1 OHM 5W 1% AXIAL 694
UB5C-1K5F1 RES 1.5K OHM 5W 1% AXIAL 104
UB5C-1R5F1 RES 1.5 OHM 5W 1% AXIAL 789
UB5C-1R8F1 RES 1.8 OHM 5W 1% AXIAL 197
UB5C-100RF1 RES 100 OHM 5W 1% AXIAL 0
UB5C-10RF1 RES 10 OHM 5W 1% AXIAL 1286
UB5C-120RF1 RES 120 OHM 5W 1% AXIAL 548
UB5C-12RF1 RES 12 OHM 5W 1% AXIAL 1106
UB5C-150RF1 RES 150 OHM 5W 1% AXIAL 218
UB5C-15RF1 RES 15 OHM 5W 1% AXIAL 1343
UB5C-180RF1 RES 180 OHM 5W 1% AXIAL 820
UB5C-2KF1 RES 2K OHM 5W 1% AXIAL 440
UB5C-2RF1 RES 2 OHM 5W 1% AXIAL 486
UB5C-200RF1 RES 200 OHM 5W 1% AXIAL 10351
UB5C-20RF1 RES 20 OHM 5W 1% AXIAL 154
UB5C-220RF1 RES 220 OHM 5W 1% AXIAL 210
UB5C-250RF1 RES 250 OHM 5W 1% AXIAL 897
UB5C-25RF1 RES 25 OHM 5W 1% AXIAL 1101
UB5C-3RF1 RES 3 OHM 5W 1% AXIAL 256
UB5C-3R3F1 RES 3.3 OHM 5W 1% AXIAL 781
UB5C-300RF1 RES 300 OHM 5W 1% AXIAL 489
UB5C-30RF1 RES 30 OHM 5W 1% AXIAL 366
UB5C-330RF1 RES 330 OHM 5W 1% AXIAL 65
UB5C-33RF1 RES 33 OHM 5W 1% AXIAL 319
UB5C-4RF1 RES 4 OHM 5W 1% AXIAL 328
UB5C-40RF1 RES 40 OHM 5W 1% AXIAL 549
UB5C-470RF1 RES 470 OHM 5W 1% AXIAL 1563
UB5C-5KF1 RES 5K OHM 5W 1% AXIAL 1900
UB5C-5RF1 RES 5 OHM 5W 1% AXIAL 362
UB5C-5R6F1 RES 5.6 OHM 5W 1% AXIAL 4551
UB5C-500RF1 RES 500 OHM 5W 1% AXIAL 641
UB5C-50RF1 RES 50 OHM 5W 1% AXIAL 349
UB5C-560RF1 RES 560 OHM 5W 1% AXIAL 9192
UB5C-56RF1 RES 56 OHM 5W 1% AXIAL 324
UB5C-75RF1 RES 75 OHM 5W 1% AXIAL 176
UB5C-8R2F1 RES 8.2 OHM 5W 1% AXIAL 1141
UB5C-900RF1 RES 900 OHM 5W 1% AXIAL 100

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 2900
S2-0R1F1 RES SMD 0.1 OHM 1% 1W 2615 606
S2-0R2F2 RES SMD 0.2 OHM 1% 1W 2615 1105
S2-0R5F1 RES SMD 0.5 OHM 1% 1W 2615 2093
S2-1RF1 RES SMD 1 OHM 1% 1W 2615 2616
S2-100RF1 RES SMD 100 OHM 1% 1W 2615 0
S2-10RF2 RES SMD 10 OHM 1% 1W 2615 723
S2-15RF1 RES SMD 15 OHM 1% 1W 2615 722
S2-2K2F1 RES SMD 2.2K OHM 1% 1W 2615 934
S2-220RF1 RES SMD 220 OHM 1% 1W 2615 2408
S2-470RF1 RES SMD 470 OHM 1% 1W 2615 1742
S2-47RF2 RES SMD 47 OHM 1% 1W 2615 2841
S2-680RF1 RES SMD 680 OHM 1% 1W 2615 2947
S2-68RF1 RES SMD 68 OHM 1% 1W 2615 2993
S3-0R01F1 RES SMD 0.01 OHM 1% 3W 6327 939
S3-0R05F1 RES SMD 0.05 OHM 1% 3W 6327 240
S3-0R1F1 RES SMD 0.1 OHM 1% 3W 6327 1191
S3-0R15F1 RES SMD 0.15 OHM 1% 3W 6327 1017
S3-0R3F1 RES SMD 0.3 OHM 1% 3W 6327 206
S3-0R5F1 RES SMD 0.5 OHM 1% 3W 6327 1013
S3-0R75F1 RES SMD 0.75 OHM 1% 3W 6327 277
S3-1RF1 RES SMD 1 OHM 1% 3W 6327 0
S3-100RF1 RES SMD 100 OHM 1% 3W 6327 514
S3-10RF1 RES SMD 10 OHM 1% 3W 6327 2003
S3-15KF1 RES SMD 15K OHM 1% 3W 6327 701
S3-150RF1 RES SMD 150 OHM 1% 3W 6327 582
S3-15RF1 RES SMD 15 OHM 1% 3W 6327 407
S3-22KF1 RES SMD 22K OHM 1% 3W 6327 777
S3-220RF1 RES SMD 220 OHM 1% 3W 6327 8500
S3-22RF1 RES SMD 22 OHM 1% 3W 6327 1466
S3-470RF1 RES SMD 470 OHM 1% 3W 6327 277
S3-47RF1 RES SMD 47 OHM 1% 3W 6327 427
S3-6K8F1 RES SMD 6.8K OHM 1% 3W 6327 1335
S3-680RF1 RES SMD 680 OHM 1% 3W 6327 754
S4-0R01F1 RES SMD 0.01 OHM 1% 2W 4525 473
S4-0R02F1 RES SMD 0.02 OHM 1% 2W 4525 390
S4-0R03F1 RES SMD 0.03 OHM 1% 2W 4525 25
S4-0R05F1 RES SMD 0.05 OHM 1% 2W 4525 1365
S4-0R2F2 RES SMD 0.2 OHM 1% 2W 4525 1128
S4-1RF1 RES SMD 1 OHM 1% 2W 4525 1681
S4-100RF1 RES SMD 100 OHM 1% 2W 4525 784
S4-10RF1 RES SMD 10 OHM 1% 2W 4525 1057
S4-15KF1 RES SMD 15K OHM 1% 2W 4525 213
S4-150RF1 RES SMD 150 OHM 1% 2W 4525 549
S4-15RF1 RES SMD 15 OHM 1% 2W 4525 1658
S4-22RF1 RES SMD 22 OHM 1% 2W 4525 1032
S4-470RF1 RES SMD 470 OHM 1% 2W 4525 3085
S4-6K8F1 RES SMD 6.8K OHM 1% 2W 4525 1359
S5-0R01F3 RES SMD 0.01 OHM 1% 4W 8230 677
S5-0R05F1 RES SMD 0.05 OHM 1% 4W 8230 558
S5-1RF1 RES SMD 1 OHM 1% 4W 8230 0
S5-10KF1 RES SMD 10K OHM 1% 4W 8230 532
S5-100RF2 RES SMD 100 OHM 1% 4W 8230 4109
S5-22KF1 RES SMD 22K OHM 1% 4W 8230 529
S5-2K2F1 RES SMD 2.2K OHM 1% 4W 8230 456
S5-220RF1 RES SMD 220 OHM 1% 4W 8230 305
S5-22RF1 RES SMD 22 OHM 1% 4W 8230 1453
S5-470RF1 RES SMD 470 OHM 1% 4W 8230 1487
S5-47RF1 RES SMD 47 OHM 1% 4W 8230 847
S5-6K8F1 RES SMD 6.8K OHM 1% 4W 8230 641
S5-680RF1 RES SMD 680 OHM 1% 4W 8230 1815
S5-68RF1 RES SMD 68 OHM 1% 4W 8230 1418

UAL

Manufacturer Part Number Description Available Quantity Datasheets
UAL10-20RF8 RES CHAS MNT 20 OHM 1% 12.5W 30
UAL25-0R5F8 RES CHAS MNT 0.5 OHM 1% 25W 0
UAL25-1K5F8 RES CHAS MNT 1.5K OHM 1% 25W 107
UAL25-750RF8 RES CHAS MNT 750 OHM 1% 25W 43
UAL25-7R5F8 RES CHAS MNT 7.5 OHM 1% 25W 83
UAL50-15RF8 RES CHAS MNT 15 OHM 1% 50W 211
UAL50-200RF8 RES CHAS MNT 200 OHM 1% 50W 70
UAL50-25KF8 RES CHAS MNT 25K OHM 1% 50W 0
UAL50-25RF8 RES CHAS MNT 25 OHM 1% 50W 70
UAL50-330RF8 RES CHAS MNT 330 OHM 1% 50W 0
UAL50-3RF8 RES CHAS MNT 3 OHM 1% 50W 9
UAL5-15RF8 RES CHAS MNT 15 OHM 1% 7.5W 80
UAL5-40RF8 RES CHAS MNT 40 OHM 1% 7.5W 38
UAL5-50RF8 RES CHAS MNT 50 OHM 1% 7.5W 2
UAL5-75RF8 RES CHAS MNT 75 OHM 1% 7.5W 21
UAL5-7R5F8 RES CHAS MNT 7.5 OHM 1% 7.5W 33
UAL10-10KF8 RES CHAS MNT 10K OHM 1% 12.5W 35
UAL10-15KF8 RES CHAS MNT 15K OHM 1% 12.5W 8
UAL10-15RF8 RES CHAS MNT 15 OHM 1% 12.5W 33
UAL10-1KF8 RES CHAS MNT 1K OHM 1% 12.5W 0
UAL10-1RF8 RES CHAS MNT 1 OHM 1% 12.5W 24
UAL10-20KF8 RES CHAS MNT 20K OHM 1% 12.5W 9
UAL10-250RF8 RES CHAS MNT 250 OHM 1% 12.5W 30
UAL10-2K5F8 RES CHAS MNT 2.5K OHM 1% 12.5W 45
UAL10-2R5F8 RES CHAS MNT 2.5 OHM 1% 12.5W 131
UAL10-2RF8 RES CHAS MNT 2 OHM 1% 12.5W 94
UAL10-300RF8 RES CHAS MNT 300 OHM 1% 12.5W 47
UAL10-330RF8 RES CHAS MNT 330 OHM 1% 12.5W 29
UAL10-33RF8 RES CHAS MNT 33 OHM 1% 12.5W 29
UAL10-500RF8 RES CHAS MNT 500 OHM 1% 12.5W 113
UAL10-50RF8 RES CHAS MNT 50 OHM 1% 12.5W 15
UAL10-5KF8 RES CHAS MNT 5K OHM 1% 12.5W 37
UAL10-5RF8 RES CHAS MNT 5 OHM 1% 12.5W 20
UAL10-75RF8 RES CHAS MNT 75 OHM 1% 12.5W 50
UAL25-10KF8 RES CHAS MNT 10K OHM 1% 25W 92
UAL25-15RF8 RES CHAS MNT 15 OHM 1% 25W 51
UAL25-1RF8 RES CHAS MNT 1 OHM 1% 25W 21
UAL25-200RF8 RES CHAS MNT 200 OHM 1% 25W 0
UAL25-20RF8 RES CHAS MNT 20 OHM 1% 25W 38
UAL25-250RF8 RES CHAS MNT 250 OHM 1% 25W 69
UAL25-25KF8 RES CHAS MNT 25K OHM 1% 25W 87
UAL25-25RF8 RES CHAS MNT 25 OHM 1% 25W 32
UAL25-2RF8 RES CHAS MNT 2 OHM 1% 25W 1
UAL25-300RF8 RES CHAS MNT 300 OHM 1% 25W 30
UAL25-3KF8 RES CHAS MNT 3K OHM 1% 25W 32
UAL25-500RF8 RES CHAS MNT 500 OHM 1% 25W 0
UAL25-50RF8 RES CHAS MNT 50 OHM 1% 25W 6
UAL25-5KF8 RES CHAS MNT 5K OHM 1% 25W 130
UAL25-75RF8 RES CHAS MNT 75 OHM 1% 25W 171
UAL50-0R15F8 RES CHAS MNT 0.15 OHM 1% 50W 0
UAL50-0R25F8 RES CHAS MNT 0.25 OHM 1% 50W 245
UAL50-0R3F8 RES CHAS MNT 0.3 OHM 1% 50W 9
UAL50-100RF8 RES CHAS MNT 100 OHM 1% 50W 3
UAL50-10KF8 RES CHAS MNT 10K OHM 1% 50W 60
UAL50-12RF8 RES CHAS MNT 12 OHM 1% 50W 222
UAL50-150RF8 RES CHAS MNT 150 OHM 1% 50W 11
UAL50-15KF8 RES CHAS MNT 15K OHM 1% 50W 57
UAL50-1K5F8 RES CHAS MNT 1.5K OHM 1% 50W 42
UAL50-1KF8 RES CHAS MNT 1K OHM 1% 50W 6
UAL50-1R5F8 RES CHAS MNT 1.5 OHM 1% 50W 111
UAL50-20KF8 RES CHAS MNT 20K OHM 1% 50W 57
UAL50-250RF8 RES CHAS MNT 250 OHM 1% 50W 10
UAL50-2K5F8 RES CHAS MNT 2.5K OHM 1% 50W 98
UAL50-2R5F8 RES CHAS MNT 2.5 OHM 1% 50W 10
UAL50-2RF8 RES CHAS MNT 2 OHM 1% 50W 193
UAL50-40RF8 RES CHAS MNT 40 OHM 1% 50W 58
UAL50-500RF8 RES CHAS MNT 500 OHM 1% 50W 107
UAL50-5KF8 RES CHAS MNT 5K OHM 1% 50W 47
UAL50-8RF8 RES CHAS MNT 8 OHM 1% 50W 261
UAL5-0R1F8 RES CHAS MNT 0.1 OHM 1% 7.5W 99
UAL5-100RF8 RES CHAS MNT 100 OHM 1% 7.5W 94
UAL5-10KF8 RES CHAS MNT 10K OHM 1% 7.5W 23
UAL5-10RF8 RES CHAS MNT 10 OHM 1% 7.5W 28
UAL5-12RF8 RES CHAS MNT 12 OHM 1% 7.5W 25
UAL5-15KF8 RES CHAS MNT 15K OHM 1% 7.5W 81
UAL5-1KF8 RES CHAS MNT 1K OHM 1% 7.5W 53
UAL5-20KF8 RES CHAS MNT 20K OHM 1% 7.5W 66
UAL5-25RF8 RES CHAS MNT 25 OHM 1% 7.5W 13
UAL5-2RF8 RES CHAS MNT 2 OHM 1% 7.5W 28
UAL5-300RF8 RES CHAS MNT 300 OHM 1% 7.5W 52
UAL5-30RF8 RES CHAS MNT 30 OHM 1% 7.5W 0
UAL5-500RF8 RES CHAS MNT 500 OHM 1% 7.5W 50
UAL5-5RF8 RES CHAS MNT 5 OHM 1% 7.5W 24
UAL10-100RF8 RES CHAS MNT 100 OHM 1% 12.5W 103
UAL10-10RF8 RES CHAS MNT 10 OHM 1% 12.5W 769
UAL10-2KF8 RES CHAS MNT 2K OHM 1% 12.5W 3
UAL10-35RF8 RES CHAS MNT 35 OHM 1% 12.5W 76
UAL10-750RF8 RES CHAS MNT 750 OHM 1% 12.5W 11
UAL25-0R1F8 RES CHAS MNT 0.1 OHM 1% 25W 42
UAL25-100RF8 RES CHAS MNT 100 OHM 1% 25W 18
UAL25-10RF8 RES CHAS MNT 10 OHM 1% 25W 112
UAL25-1KF8 RES CHAS MNT 1K OHM 1% 25W 139
UAL25-2KF8 RES CHAS MNT 2K OHM 1% 25W 34
UAL25-3RF8 RES CHAS MNT 3 OHM 1% 25W 87
UAL25-40RF8 RES CHAS MNT 40 OHM 1% 25W 50
UAL25-5RF8 RES CHAS MNT 5 OHM 1% 25W 72
UAL50-0R1F8 RES CHAS MNT 0.1 OHM 1% 50W 11
UAL50-0R5F8 RES CHAS MNT 0.5 OHM 1% 50W 27
UAL50-100KF8 RES CHAS MNT 100K OHM 1% 50W 0
UAL50-10RF8 RES CHAS MNT 10 OHM 1% 50W 25
UAL50-16RF8 RES CHAS MNT 16 OHM 1% 50W 143
UAL50-1RF8 RES CHAS MNT 1 OHM 1% 50W 68
UAL50-20RF8 RES CHAS MNT 20 OHM 1% 50W 102
UAL50-300RF8 RES CHAS MNT 300 OHM 1% 50W 60
UAL50-30RF8 RES CHAS MNT 30 OHM 1% 50W 2
UAL50-3R3F8 RES CHAS MNT 3.3 OHM 1% 50W 54
UAL50-50KF8 RES CHAS MNT 50K OHM 1% 50W 50
UAL50-50RF8 RES CHAS MNT 50 OHM 1% 50W 0
UAL50-5RF8 RES CHAS MNT 5 OHM 1% 50W 264
UAL50-6RF8 RES CHAS MNT 6 OHM 1% 50W 92
UAL50-75RF8 RES CHAS MNT 75 OHM 1% 50W 379
UAL5-0R5F8 RES CHAS MNT 0.5 OHM 1% 7.5W 584
UAL5-150RF8 RES CHAS MNT 150 OHM 1% 7.5W 75
UAL5-1RF8 RES CHAS MNT 1 OHM 1% 7.5W 84
UAL5-2KF8 RES CHAS MNT 2K OHM 1% 7.5W 28
UAL5-390RF8 RES CHAS MNT 390 OHM 1% 7.5W 75
UAL50-0R2F8 RES CHAS MNT 0.2 OHM 1% 50W 0