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 349
UB3C-0R2F1 RES 0.2 OHM 3W 1% AXIAL 170
UB3C-0R25F1 RES 0.25 OHM 3W 1% AXIAL 354
UB3C-0R3F1 RES 0.3 OHM 3W 1% AXIAL 628
UB3C-0R33F1 RES 0.33 OHM 3W 1% AXIAL 7982
UB3C-0R5F1 RES 0.5 OHM 3W 1% AXIAL 503
UB3C-1KF1 RES 1K OHM 3W 1% AXIAL 518
UB3C-1RF1 RES 1 OHM 3W 1% AXIAL 1449
UB3C-1R5F1 RES 1.5 OHM 3W 1% AXIAL 181
UB3C-1R8F1 RES 1.8 OHM 3W 1% AXIAL 410
UB3C-100RF1 RES 100 OHM 3W 1% AXIAL 592
UB3C-10RF1 RES 10 OHM 3W 1% AXIAL 568
UB3C-120RF1 RES 120 OHM 3W 1% AXIAL 678
UB3C-150RF1 RES 150 OHM 3W 1% AXIAL 351
UB3C-15RF1 RES 15 OHM 3W 1% AXIAL 189
UB3C-180RF1 RES 180 OHM 3W 1% AXIAL 75
UB3C-2RF1 RES 2 OHM 3W 1% AXIAL 179
UB3C-200RF1 RES 200 OHM 3W 1% AXIAL 428
UB3C-20RF1 RES 20 OHM 3W 1% AXIAL 163
UB3C-250RF1 RES 250 OHM 3W 1% AXIAL 171
UB3C-25RF1 RES 25 OHM 3W 1% AXIAL 161
UB3C-3RF1 RES 3 OHM 3W 1% AXIAL 487
UB3C-30RF1 RES 30 OHM 3W 1% AXIAL 180
UB3C-330RF1 RES 330 OHM 3W 1% AXIAL 227
UB3C-33RF1 RES 33 OHM 3W 1% AXIAL 245
UB3C-4RF1 RES 4 OHM 3W 1% AXIAL 376
UB3C-40RF1 RES 40 OHM 3W 1% AXIAL 414
UB3C-5RF1 RES 5 OHM 3W 1% AXIAL 1554
UB3C-5R6F1 RES 5.6 OHM 3W 1% AXIAL 694
UB3C-500RF1 RES 500 OHM 3W 1% AXIAL 0
UB3C-50RF1 RES 50 OHM 3W 1% AXIAL 416
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 236
UB3C-8R2F1 RES 8.2 OHM 3W 1% AXIAL 1006
UB3C-900RF1 RES 900 OHM 3W 1% AXIAL 43
UB5C-0R1F1 RES 0.1 OHM 5W 1% AXIAL 1867
UB5C-0R2F1 RES 0.2 OHM 5W 1% AXIAL 610
UB5C-0R25F1 RES 0.25 OHM 5W 1% AXIAL 530
UB5C-0R33F1 RES 0.33 OHM 5W 1% AXIAL 612
UB5C-0R5F1 RES 0.5 OHM 5W 1% AXIAL 882
UB5C-1KF1 RES 1K OHM 5W 1% AXIAL 500
UB5C-1RF1 RES 1 OHM 5W 1% AXIAL 524
UB5C-1K5F1 RES 1.5K OHM 5W 1% AXIAL 104
UB5C-1R5F1 RES 1.5 OHM 5W 1% AXIAL 0
UB5C-1R8F1 RES 1.8 OHM 5W 1% AXIAL 527
UB5C-100RF1 RES 100 OHM 5W 1% AXIAL 332
UB5C-10RF1 RES 10 OHM 5W 1% AXIAL 1717
UB5C-120RF1 RES 120 OHM 5W 1% AXIAL 610
UB5C-12RF1 RES 12 OHM 5W 1% AXIAL 1125
UB5C-150RF1 RES 150 OHM 5W 1% AXIAL 288
UB5C-15RF1 RES 15 OHM 5W 1% AXIAL 1343
UB5C-180RF1 RES 180 OHM 5W 1% AXIAL 830
UB5C-2KF1 RES 2K OHM 5W 1% AXIAL 455
UB5C-2RF1 RES 2 OHM 5W 1% AXIAL 581
UB5C-200RF1 RES 200 OHM 5W 1% AXIAL 10394
UB5C-20RF1 RES 20 OHM 5W 1% AXIAL 218
UB5C-220RF1 RES 220 OHM 5W 1% AXIAL 245
UB5C-250RF1 RES 250 OHM 5W 1% AXIAL 926
UB5C-25RF1 RES 25 OHM 5W 1% AXIAL 207
UB5C-3RF1 RES 3 OHM 5W 1% AXIAL 406
UB5C-3R3F1 RES 3.3 OHM 5W 1% AXIAL 1351
UB5C-300RF1 RES 300 OHM 5W 1% AXIAL 489
UB5C-30RF1 RES 30 OHM 5W 1% AXIAL 699
UB5C-330RF1 RES 330 OHM 5W 1% AXIAL 630
UB5C-33RF1 RES 33 OHM 5W 1% AXIAL 319
UB5C-4RF1 RES 4 OHM 5W 1% AXIAL 430
UB5C-40RF1 RES 40 OHM 5W 1% AXIAL 561
UB5C-470RF1 RES 470 OHM 5W 1% AXIAL 1733
UB5C-5KF1 RES 5K OHM 5W 1% AXIAL 2219
UB5C-5RF1 RES 5 OHM 5W 1% AXIAL 444
UB5C-5R6F1 RES 5.6 OHM 5W 1% AXIAL 4856
UB5C-500RF1 RES 500 OHM 5W 1% AXIAL 1021
UB5C-50RF1 RES 50 OHM 5W 1% AXIAL 495
UB5C-560RF1 RES 560 OHM 5W 1% AXIAL 9202
UB5C-56RF1 RES 56 OHM 5W 1% AXIAL 334
UB5C-75RF1 RES 75 OHM 5W 1% AXIAL 261
UB5C-8R2F1 RES 8.2 OHM 5W 1% AXIAL 752
UB5C-900RF1 RES 900 OHM 5W 1% AXIAL 100

S

Manufacturer Part Number Description Available Quantity Datasheets
S2-0R03F3 RES .03 OHM 1W 1% WW SMD 3852
S2-0R05F1 RES .05 OHM 1W 1% WW SMD 807
S2-0R1F1 RES .1 OHM 1W 1% WW SMD 606
S2-0R2F2 RES .2 OHM 1W 1% WW SMD 1109
S2-0R5F1 RES .5 OHM 1W 1% WW SMD 2093
S2-1RF1 RES 1 OHM 1W 1% WW SMD 3126
S2-100RF1 RES 100 OHM 1W 1% WW SMD 364
S2-10RF2 RES 10 OHM 1W 1% WW SMD 1323
S2-15RF1 RES 15 OHM 1W 1% WW SMD 1792
S2-2K2F1 RES 2200 OHM 1W 1% WW SMD 1034
S2-220RF1 RES 220 OHM 1W 1% WW SMD 2413
S2-470RF1 RES 470 OHM 1W 1% WW SMD 1777
S2-47RF2 RES 47 OHM 1W 1% WW SMD 2841
S2-680RF1 RES 680 OHM 1W 1% WW SMD 2947
S2-68RF1 RES 68 OHM 1W 1% WW SMD 2993
S3-0R01F1 RES .01 OHM 3W 1% WW SMD 939
S3-0R05F1 RES .05 OHM 3W 1% WW SMD 240
S3-0R1F1 RES .1 OHM 3W 1% WW SMD 1194
S3-0R15F1 RES .15 OHM 3W 1% WW SMD 1017
S3-0R3F1 RES .3 OHM 3W 1% WW SMD 231
S3-0R5F1 RES .5 OHM 3W 1% WW SMD 1013
S3-0R75F1 RES .75 OHM 3W 1% WW SMD 559
S3-1RF1 RES 1 OHM 3W 1% WW SMD 495
S3-100RF1 RES 100 OHM 3W 1% WW SMD 614
S3-10RF1 RES 10 OHM 3W 1% WW SMD 2563
S3-15KF1 RES 15000 OHM 3W 1% WW SMD 701
S3-150RF1 RES 150 OHM 3W 1% WW SMD 582
S3-15RF1 RES 15 OHM 3W 1% WW SMD 407
S3-22KF1 RES 22000 OHM 3W 1% WW SMD 877
S3-220RF1 RES 220 OHM 3W 1% WW SMD 8600
S3-22RF1 RES 22 OHM 3W 1% WW SMD 1816
S3-470RF1 RES 470 OHM 3W 1% WW SMD 777
S3-47RF1 RES 47 OHM 3W 1% WW SMD 427
S3-6K8F1 RES 6800 OHM 3W 1% WW SMD 1335
S3-680RF1 RES 680 OHM 3W 1% WW SMD 754
S4-0R01F1 RES .01 OHM 2W 1% WW SMD 223
S4-0R02F1 RES .02 OHM 2W 1% WW SMD 390
S4-0R03F1 RES .03 OHM 2W 1% WW SMD 975
S4-0R05F1 RES .05 OHM 2W 1% WW SMD 1365
S4-0R2F2 RES .2 OHM 2W 1% WW SMD 1128
S4-1RF1 RES 1 OHM 2W 1% WW SMD 456
S4-100RF1 RES 100 OHM 2W 1% WW SMD 834
S4-10RF1 RES 10 OHM 2W 1% WW SMD 312
S4-15KF1 RES 15000 OHM 2W 1% WW SMD 163
S4-150RF1 RES 150 OHM 2W 1% WW SMD 549
S4-15RF1 RES 15 OHM 2W 1% WW SMD 1683
S4-22RF1 RES 22 OHM 2W 1% WW SMD 1547
S4-470RF1 RES 470 OHM 2W 1% WW SMD 3325
S4-6K8F1 RES 6800 OHM 2W 1% WW SMD 1359
S5-0R01F3 RES .01 OHM 4W 1% WW SMD 427
S5-0R05F1 RES .05 OHM 4W 1% WW SMD 598
S5-1RF1 RES 1 OHM 4W 1% WW SMD 953
S5-10KF1 RES 10000 OHM 4W 1% WW SMD 532
S5-100RF2 RES 100 OHM 4W 1% WW SMD 4109
S5-22KF1 RES 22000 OHM 4W 1% WW SMD 529
S5-2K2F1 RES 2200 OHM 4W 1% WW SMD 606
S5-220RF1 RES 220 OHM 4W 1% WW SMD 470
S5-22RF1 RES 22 OHM 4W 1% WW SMD 1453
S5-470RF1 RES 470 OHM 4W 1% WW SMD 1497
S5-47RF1 RES 47 OHM 4W 1% WW SMD 847
S5-6K8F1 RES 6800 OHM 4W 1% WW SMD 641
S5-680RF1 RES 680 OHM 4W 1% WW SMD 1815
S5-68RF1 RES 68 OHM 4W 1% WW SMD 496

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 39
UAL25-1K5F8 RES CHAS MNT 1.5K OHM 1% 25W 109
UAL25-750RF8 RES CHAS MNT 750 OHM 1% 25W 48
UAL25-7R5F8 RES CHAS MNT 7.5 OHM 1% 25W 103
UAL50-15RF8 RES CHAS MNT 15 OHM 1% 50W 217
UAL50-200RF8 RES CHAS MNT 200 OHM 1% 50W 0
UAL50-25KF8 RES CHAS MNT 25K OHM 1% 50W 9
UAL50-25RF8 RES CHAS MNT 25 OHM 1% 50W 0
UAL50-330RF8 RES CHAS MNT 330 OHM 1% 50W 14
UAL50-3RF8 RES CHAS MNT 3 OHM 1% 50W 109
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 23
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 16
UAL10-15RF8 RES CHAS MNT 15 OHM 1% 12.5W 33
UAL10-1KF8 RES CHAS MNT 1K OHM 1% 12.5W 14
UAL10-1RF8 RES CHAS MNT 1 OHM 1% 12.5W 25
UAL10-20KF8 RES CHAS MNT 20K OHM 1% 12.5W 11
UAL10-250RF8 RES CHAS MNT 250 OHM 1% 12.5W 34
UAL10-2K5F8 RES CHAS MNT 2.5K OHM 1% 12.5W 50
UAL10-2R5F8 RES CHAS MNT 2.5 OHM 1% 12.5W 134
UAL10-2RF8 RES CHAS MNT 2 OHM 1% 12.5W 99
UAL10-300RF8 RES CHAS MNT 300 OHM 1% 12.5W 75
UAL10-330RF8 RES CHAS MNT 330 OHM 1% 12.5W 29
UAL10-33RF8 RES CHAS MNT 33 OHM 1% 12.5W 30
UAL10-500RF8 RES CHAS MNT 500 OHM 1% 12.5W 117
UAL10-50RF8 RES CHAS MNT 50 OHM 1% 12.5W 45
UAL10-5KF8 RES CHAS MNT 5K OHM 1% 12.5W 41
UAL10-5RF8 RES CHAS MNT 5 OHM 1% 12.5W 25
UAL10-75RF8 RES CHAS MNT 75 OHM 1% 12.5W 56
UAL25-10KF8 RES CHAS MNT 10K OHM 1% 25W 92
UAL25-15RF8 RES CHAS MNT 15 OHM 1% 25W 101
UAL25-1RF8 RES CHAS MNT 1 OHM 1% 25W 22
UAL25-200RF8 RES CHAS MNT 200 OHM 1% 25W 69
UAL25-20RF8 RES CHAS MNT 20 OHM 1% 25W 0
UAL25-250RF8 RES CHAS MNT 250 OHM 1% 25W 69
UAL25-25KF8 RES CHAS MNT 25K OHM 1% 25W 126
UAL25-25RF8 RES CHAS MNT 25 OHM 1% 25W 34
UAL25-2RF8 RES CHAS MNT 2 OHM 1% 25W 10
UAL25-300RF8 RES CHAS MNT 300 OHM 1% 25W 37
UAL25-3KF8 RES CHAS MNT 3K OHM 1% 25W 32
UAL25-500RF8 RES CHAS MNT 500 OHM 1% 25W 126
UAL25-50RF8 RES CHAS MNT 50 OHM 1% 25W 6
UAL25-5KF8 RES CHAS MNT 5K OHM 1% 25W 233
UAL25-75RF8 RES CHAS MNT 75 OHM 1% 25W 172
UAL50-0R15F8 RES CHAS MNT 0.15 OHM 1% 50W 22
UAL50-0R25F8 RES CHAS MNT 0.25 OHM 1% 50W 235
UAL50-0R3F8 RES CHAS MNT 0.3 OHM 1% 50W 50
UAL50-100RF8 RES CHAS MNT 100 OHM 1% 50W 114
UAL50-10KF8 RES CHAS MNT 10K OHM 1% 50W 12
UAL50-12RF8 RES CHAS MNT 12 OHM 1% 50W 336
UAL50-150RF8 RES CHAS MNT 150 OHM 1% 50W 0
UAL50-15KF8 RES CHAS MNT 15K OHM 1% 50W 68
UAL50-1K5F8 RES CHAS MNT 1.5K OHM 1% 50W 42
UAL50-1KF8 RES CHAS MNT 1K OHM 1% 50W 17
UAL50-1R5F8 RES CHAS MNT 1.5 OHM 1% 50W 115
UAL50-20KF8 RES CHAS MNT 20K OHM 1% 50W 25
UAL50-250RF8 RES CHAS MNT 250 OHM 1% 50W 10
UAL50-2K5F8 RES CHAS MNT 2.5K OHM 1% 50W 109
UAL50-2R5F8 RES CHAS MNT 2.5 OHM 1% 50W 26
UAL50-2RF8 RES CHAS MNT 2 OHM 1% 50W 155
UAL50-40RF8 RES CHAS MNT 40 OHM 1% 50W 63
UAL50-500RF8 RES CHAS MNT 500 OHM 1% 50W 122
UAL50-5KF8 RES CHAS MNT 5K OHM 1% 50W 56
UAL50-8RF8 RES CHAS MNT 8 OHM 1% 50W 333
UAL5-0R1F8 RES CHAS MNT 0.1 OHM 1% 7.5W 100
UAL5-100RF8 RES CHAS MNT 100 OHM 1% 7.5W 94
UAL5-10KF8 RES CHAS MNT 10K OHM 1% 7.5W 61
UAL5-10RF8 RES CHAS MNT 10 OHM 1% 7.5W 28
UAL5-12RF8 RES CHAS MNT 12 OHM 1% 7.5W 28
UAL5-15KF8 RES CHAS MNT 15K OHM 1% 7.5W 81
UAL5-1KF8 RES CHAS MNT 1K OHM 1% 7.5W 60
UAL5-20KF8 RES CHAS MNT 20K OHM 1% 7.5W 69
UAL5-25RF8 RES CHAS MNT 25 OHM 1% 7.5W 15
UAL5-2RF8 RES CHAS MNT 2 OHM 1% 7.5W 28
UAL5-300RF8 RES CHAS MNT 300 OHM 1% 7.5W 85
UAL5-30RF8 RES CHAS MNT 30 OHM 1% 7.5W 2
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 38
UAL10-10RF8 RES CHAS MNT 10 OHM 1% 12.5W 769
UAL10-2KF8 RES CHAS MNT 2K OHM 1% 12.5W 13
UAL10-35RF8 RES CHAS MNT 35 OHM 1% 12.5W 76
UAL10-750RF8 RES CHAS MNT 750 OHM 1% 12.5W 18
UAL25-0R1F8 RES CHAS MNT 0.1 OHM 1% 25W 48
UAL25-100RF8 RES CHAS MNT 100 OHM 1% 25W 19
UAL25-10RF8 RES CHAS MNT 10 OHM 1% 25W 115
UAL25-1KF8 RES CHAS MNT 1K OHM 1% 25W 75
UAL25-2KF8 RES CHAS MNT 2K OHM 1% 25W 43
UAL25-3RF8 RES CHAS MNT 3 OHM 1% 25W 87
UAL25-40RF8 RES CHAS MNT 40 OHM 1% 25W 59
UAL25-5RF8 RES CHAS MNT 5 OHM 1% 25W 73
UAL50-0R1F8 RES CHAS MNT 0.1 OHM 1% 50W 49
UAL50-0R5F8 RES CHAS MNT 0.5 OHM 1% 50W 81
UAL50-100KF8 RES CHAS MNT 100K OHM 1% 50W 43
UAL50-10RF8 RES CHAS MNT 10 OHM 1% 50W 75
UAL50-16RF8 RES CHAS MNT 16 OHM 1% 50W 176
UAL50-1RF8 RES CHAS MNT 1 OHM 1% 50W 73
UAL50-20RF8 RES CHAS MNT 20 OHM 1% 50W 106
UAL50-300RF8 RES CHAS MNT 300 OHM 1% 50W 71
UAL50-30RF8 RES CHAS MNT 30 OHM 1% 50W 2
UAL50-3R3F8 RES CHAS MNT 3.3 OHM 1% 50W 74
UAL50-50KF8 RES CHAS MNT 50K OHM 1% 50W 49
UAL50-50RF8 RES CHAS MNT 50 OHM 1% 50W 25
UAL50-5RF8 RES CHAS MNT 5 OHM 1% 50W 414
UAL50-6RF8 RES CHAS MNT 6 OHM 1% 50W 50
UAL50-75RF8 RES CHAS MNT 75 OHM 1% 50W 382
UAL5-0R5F8 RES CHAS MNT 0.5 OHM 1% 7.5W 686
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 44
UAL5-390RF8 RES CHAS MNT 390 OHM 1% 7.5W 0
UAL50-0R2F8 RES CHAS MNT 0.2 OHM 1% 50W 34