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 402
UB3C-0R2F1 RES 0.2 OHM 3W 1% AXIAL 136
UB3C-0R25F1 RES 0.25 OHM 3W 1% AXIAL 0
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 442
UB3C-1RF1 RES 1 OHM 3W 1% AXIAL 1242
UB3C-1R5F1 RES 1.5 OHM 3W 1% AXIAL 147
UB3C-1R8F1 RES 1.8 OHM 3W 1% AXIAL 500
UB3C-100RF1 RES 100 OHM 3W 1% AXIAL 405
UB3C-10RF1 RES 10 OHM 3W 1% AXIAL 714
UB3C-120RF1 RES 120 OHM 3W 1% AXIAL 596
UB3C-150RF1 RES 150 OHM 3W 1% AXIAL 491
UB3C-15RF1 RES 15 OHM 3W 1% AXIAL 134
UB3C-180RF1 RES 180 OHM 3W 1% AXIAL 500
UB3C-2RF1 RES 2 OHM 3W 1% AXIAL 457
UB3C-200RF1 RES 200 OHM 3W 1% AXIAL 352
UB3C-20RF1 RES 20 OHM 3W 1% AXIAL 508
UB3C-250RF1 RES 250 OHM 3W 1% AXIAL 551
UB3C-25RF1 RES 25 OHM 3W 1% AXIAL 549
UB3C-3RF1 RES 3 OHM 3W 1% AXIAL 458
UB3C-30RF1 RES 30 OHM 3W 1% AXIAL 114
UB3C-330RF1 RES 330 OHM 3W 1% AXIAL 142
UB3C-33RF1 RES 33 OHM 3W 1% AXIAL 180
UB3C-4RF1 RES 4 OHM 3W 1% AXIAL 195
UB3C-40RF1 RES 40 OHM 3W 1% AXIAL 328
UB3C-5RF1 RES 5 OHM 3W 1% AXIAL 1250
UB3C-5R6F1 RES 5.6 OHM 3W 1% AXIAL 911
UB3C-500RF1 RES 500 OHM 3W 1% AXIAL 1075
UB3C-50RF1 RES 50 OHM 3W 1% AXIAL 864
UB3C-680RF1 RES 680 OHM 3W 1% AXIAL 322
UB3C-7R5F1 RES 7.5 OHM 3W 1% AXIAL 112
UB3C-75RF1 RES 75 OHM 3W 1% AXIAL 1086
UB3C-8R2F1 RES 8.2 OHM 3W 1% AXIAL 973
UB3C-900RF1 RES 900 OHM 3W 1% AXIAL 496
UB5C-0R1F1 RES 0.1 OHM 5W 1% AXIAL 1917
UB5C-0R2F1 RES 0.2 OHM 5W 1% AXIAL 582
UB5C-0R25F1 RES 0.25 OHM 5W 1% AXIAL 3558
UB5C-0R33F1 RES 0.33 OHM 5W 1% AXIAL 350
UB5C-0R5F1 RES 0.5 OHM 5W 1% AXIAL 862
UB5C-1KF1 RES 1K OHM 5W 1% AXIAL 738
UB5C-1RF1 RES 1 OHM 5W 1% AXIAL 1207
UB5C-1K5F1 RES 1.5K OHM 5W 1% AXIAL 68
UB5C-1R5F1 RES 1.5 OHM 5W 1% AXIAL 267
UB5C-1R8F1 RES 1.8 OHM 5W 1% AXIAL 556
UB5C-100RF1 RES 100 OHM 5W 1% AXIAL 791
UB5C-10RF1 RES 10 OHM 5W 1% AXIAL 5215
UB5C-120RF1 RES 120 OHM 5W 1% AXIAL 694
UB5C-12RF1 RES 12 OHM 5W 1% AXIAL 939
UB5C-150RF1 RES 150 OHM 5W 1% AXIAL 146
UB5C-15RF1 RES 15 OHM 5W 1% AXIAL 1310
UB5C-180RF1 RES 180 OHM 5W 1% AXIAL 718
UB5C-2KF1 RES 2K OHM 5W 1% AXIAL 301
UB5C-2RF1 RES 2 OHM 5W 1% AXIAL 315
UB5C-200RF1 RES 200 OHM 5W 1% AXIAL 10301
UB5C-20RF1 RES 20 OHM 5W 1% AXIAL 557
UB5C-220RF1 RES 220 OHM 5W 1% AXIAL 325
UB5C-250RF1 RES 250 OHM 5W 1% AXIAL 712
UB5C-25RF1 RES 25 OHM 5W 1% AXIAL 288
UB5C-3RF1 RES 3 OHM 5W 1% AXIAL 625
UB5C-3R3F1 RES 3.3 OHM 5W 1% AXIAL 1059
UB5C-300RF1 RES 300 OHM 5W 1% AXIAL 481
UB5C-30RF1 RES 30 OHM 5W 1% AXIAL 1034
UB5C-330RF1 RES 330 OHM 5W 1% AXIAL 62
UB5C-33RF1 RES 33 OHM 5W 1% AXIAL 154
UB5C-4RF1 RES 4 OHM 5W 1% AXIAL 245
UB5C-40RF1 RES 40 OHM 5W 1% AXIAL 490
UB5C-470RF1 RES 470 OHM 5W 1% AXIAL 1395
UB5C-5KF1 RES 5K OHM 5W 1% AXIAL 1256
UB5C-5RF1 RES 5 OHM 5W 1% AXIAL 634
UB5C-5R6F1 RES 5.6 OHM 5W 1% AXIAL 3295
UB5C-500RF1 RES 500 OHM 5W 1% AXIAL 854
UB5C-50RF1 RES 50 OHM 5W 1% AXIAL 56
UB5C-560RF1 RES 560 OHM 5W 1% AXIAL 9100
UB5C-56RF1 RES 56 OHM 5W 1% AXIAL 284
UB5C-75RF1 RES 75 OHM 5W 1% AXIAL 676
UB5C-8R2F1 RES 8.2 OHM 5W 1% AXIAL 856
UB5C-900RF1 RES 900 OHM 5W 1% AXIAL 87

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 780
S2-0R1F1 RES SMD 0.1 OHM 1% 1W 2615 592
S2-0R2F2 RES SMD 0.2 OHM 1% 1W 2615 1095
S2-0R5F1 RES SMD 0.5 OHM 1% 1W 2615 2083
S2-1RF1 RES SMD 1 OHM 1% 1W 2615 2516
S2-100RF1 RES SMD 100 OHM 1% 1W 2615 1200
S2-10RF2 RES SMD 10 OHM 1% 1W 2615 1008
S2-15RF1 RES SMD 15 OHM 1% 1W 2615 720
S2-2K2F1 RES SMD 2.2K OHM 1% 1W 2615 784
S2-220RF1 RES SMD 220 OHM 1% 1W 2615 2108
S2-470RF1 RES SMD 470 OHM 1% 1W 2615 1532
S2-47RF2 RES SMD 47 OHM 1% 1W 2615 1937
S2-680RF1 RES SMD 680 OHM 1% 1W 2615 2947
S2-68RF1 RES SMD 68 OHM 1% 1W 2615 2958
S3-0R01F1 RES SMD 0.01 OHM 1% 3W 6327 939
S3-0R05F1 RES SMD 0.05 OHM 1% 3W 6327 236
S3-0R1F1 RES SMD 0.1 OHM 1% 3W 6327 629
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 487
S3-0R75F1 RES SMD 0.75 OHM 1% 3W 6327 267
S3-1RF1 RES SMD 1 OHM 1% 3W 6327 471
S3-100RF1 RES SMD 100 OHM 1% 3W 6327 124
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 520
S3-15RF1 RES SMD 15 OHM 1% 3W 6327 297
S3-22KF1 RES SMD 22K OHM 1% 3W 6327 777
S3-220RF1 RES SMD 220 OHM 1% 3W 6327 6975
S3-22RF1 RES SMD 22 OHM 1% 3W 6327 964
S3-470RF1 RES SMD 470 OHM 1% 3W 6327 371
S3-47RF1 RES SMD 47 OHM 1% 3W 6327 425
S3-6K8F1 RES SMD 6.8K OHM 1% 3W 6327 1325
S3-680RF1 RES SMD 680 OHM 1% 3W 6327 754
S4-0R01F1 RES SMD 0.01 OHM 1% 2W 4525 446
S4-0R02F1 RES SMD 0.02 OHM 1% 2W 4525 613
S4-0R03F1 RES SMD 0.03 OHM 1% 2W 4525 1125
S4-0R05F1 RES SMD 0.05 OHM 1% 2W 4525 1328
S4-0R2F2 RES SMD 0.2 OHM 1% 2W 4525 1083
S4-1RF1 RES SMD 1 OHM 1% 2W 4525 1671
S4-100RF1 RES SMD 100 OHM 1% 2W 4525 778
S4-10RF1 RES SMD 10 OHM 1% 2W 4525 1202
S4-15KF1 RES SMD 15K OHM 1% 2W 4525 463
S4-150RF1 RES SMD 150 OHM 1% 2W 4525 424
S4-15RF1 RES SMD 15 OHM 1% 2W 4525 1358
S4-22RF1 RES SMD 22 OHM 1% 2W 4525 917
S4-470RF1 RES SMD 470 OHM 1% 2W 4525 2775
S4-6K8F1 RES SMD 6.8K OHM 1% 2W 4525 1359
S5-0R01F3 RES SMD 0.01 OHM 1% 4W 8230 1177
S5-0R05F1 RES SMD 0.05 OHM 1% 4W 8230 558
S5-1RF1 RES SMD 1 OHM 1% 4W 8230 249
S5-10KF1 RES SMD 10K OHM 1% 4W 8230 526
S5-100RF2 RES SMD 100 OHM 1% 4W 8230 3109
S5-22KF1 RES SMD 22K OHM 1% 4W 8230 529
S5-2K2F1 RES SMD 2.2K OHM 1% 4W 8230 302
S5-220RF1 RES SMD 220 OHM 1% 4W 8230 313
S5-22RF1 RES SMD 22 OHM 1% 4W 8230 693
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 636
S5-680RF1 RES SMD 680 OHM 1% 4W 8230 1560
S5-68RF1 RES SMD 68 OHM 1% 4W 8230 1394

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 0
UAL25-750RF8 RES CHAS MNT 750 OHM 1% 25W 41
UAL25-7R5F8 RES CHAS MNT 7.5 OHM 1% 25W 107
UAL50-15RF8 RES CHAS MNT 15 OHM 1% 50W 76
UAL50-200RF8 RES CHAS MNT 200 OHM 1% 50W 256
UAL50-25KF8 RES CHAS MNT 25K OHM 1% 50W 38
UAL50-25RF8 RES CHAS MNT 25 OHM 1% 50W 48
UAL50-330RF8 RES CHAS MNT 330 OHM 1% 50W 39
UAL50-3RF8 RES CHAS MNT 3 OHM 1% 50W 67
UAL5-15RF8 RES CHAS MNT 15 OHM 1% 7.5W 78
UAL5-40RF8 RES CHAS MNT 40 OHM 1% 7.5W 30
UAL5-50RF8 RES CHAS MNT 50 OHM 1% 7.5W 74
UAL5-7R5F8 RES CHAS MNT 7.5 OHM 1% 7.5W 28
UAL10-15KF8 RES CHAS MNT 15K OHM 1% 12.5W 75
UAL10-1KF8 RES CHAS MNT 1K OHM 1% 12.5W 48
UAL10-20KF8 RES CHAS MNT 20K OHM 1% 12.5W 74
UAL10-2R5F8 RES CHAS MNT 2.5 OHM 1% 12.5W 242
UAL10-2RF8 RES CHAS MNT 2 OHM 1% 12.5W 42
UAL10-300RF8 RES CHAS MNT 300 OHM 1% 12.5W 117
UAL10-500RF8 RES CHAS MNT 500 OHM 1% 12.5W 108
UAL10-50RF8 RES CHAS MNT 50 OHM 1% 12.5W 15
UAL10-5RF8 RES CHAS MNT 5 OHM 1% 12.5W 4
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 50
UAL25-200RF8 RES CHAS MNT 200 OHM 1% 25W 133
UAL25-20RF8 RES CHAS MNT 20 OHM 1% 25W 97
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 92
UAL25-2RF8 RES CHAS MNT 2 OHM 1% 25W 75
UAL25-300RF8 RES CHAS MNT 300 OHM 1% 25W 75
UAL25-500RF8 RES CHAS MNT 500 OHM 1% 25W 394
UAL25-50RF8 RES CHAS MNT 50 OHM 1% 25W 2
UAL25-5KF8 RES CHAS MNT 5K OHM 1% 25W 147
UAL25-75RF8 RES CHAS MNT 75 OHM 1% 25W 130
UAL50-0R15F8 RES CHAS MNT 0.15 OHM 1% 50W 50
UAL50-0R25F8 RES CHAS MNT 0.25 OHM 1% 50W 241
UAL50-0R3F8 RES CHAS MNT 0.3 OHM 1% 50W 80
UAL50-100RF8 RES CHAS MNT 100 OHM 1% 50W 80
UAL50-10KF8 RES CHAS MNT 10K OHM 1% 50W 8
UAL50-12RF8 RES CHAS MNT 12 OHM 1% 50W 374
UAL50-150RF8 RES CHAS MNT 150 OHM 1% 50W 108
UAL50-15KF8 RES CHAS MNT 15K OHM 1% 50W 41
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 91
UAL50-250RF8 RES CHAS MNT 250 OHM 1% 50W 80
UAL50-2K5F8 RES CHAS MNT 2.5K OHM 1% 50W 0
UAL50-2R5F8 RES CHAS MNT 2.5 OHM 1% 50W 70
UAL50-2RF8 RES CHAS MNT 2 OHM 1% 50W 139
UAL50-40RF8 RES CHAS MNT 40 OHM 1% 50W 56
UAL50-500RF8 RES CHAS MNT 500 OHM 1% 50W 65
UAL50-5KF8 RES CHAS MNT 5K OHM 1% 50W 0
UAL50-8RF8 RES CHAS MNT 8 OHM 1% 50W 238
UAL5-0R1F8 RES CHAS MNT 0.1 OHM 1% 7.5W 60
UAL5-100RF8 RES CHAS MNT 100 OHM 1% 7.5W 92
UAL5-10KF8 RES CHAS MNT 10K OHM 1% 7.5W 23
UAL5-10RF8 RES CHAS MNT 10 OHM 1% 7.5W 38
UAL5-15KF8 RES CHAS MNT 15K OHM 1% 7.5W 0
UAL5-1KF8 RES CHAS MNT 1K OHM 1% 7.5W 120
UAL5-20KF8 RES CHAS MNT 20K OHM 1% 7.5W 63
UAL5-25RF8 RES CHAS MNT 25 OHM 1% 7.5W 11
UAL5-300RF8 RES CHAS MNT 300 OHM 1% 7.5W 102
UAL5-30RF8 RES CHAS MNT 30 OHM 1% 7.5W 75
UAL5-500RF8 RES CHAS MNT 500 OHM 1% 7.5W 122
UAL10-100RF8 RES CHAS MNT 100 OHM 1% 12.5W 53
UAL10-10RF8 RES CHAS MNT 10 OHM 1% 12.5W 768
UAL10-2KF8 RES CHAS MNT 2K OHM 1% 12.5W 77
UAL10-35RF8 RES CHAS MNT 35 OHM 1% 12.5W 76
UAL10-750RF8 RES CHAS MNT 750 OHM 1% 12.5W 10
UAL25-0R1F8 RES CHAS MNT 0.1 OHM 1% 25W 95
UAL25-100RF8 RES CHAS MNT 100 OHM 1% 25W 18
UAL25-10RF8 RES CHAS MNT 10 OHM 1% 25W 93
UAL25-1KF8 RES CHAS MNT 1K OHM 1% 25W 2
UAL25-2KF8 RES CHAS MNT 2K OHM 1% 25W 93
UAL25-3RF8 RES CHAS MNT 3 OHM 1% 25W 70
UAL25-40RF8 RES CHAS MNT 40 OHM 1% 25W 5
UAL25-5RF8 RES CHAS MNT 5 OHM 1% 25W 44
UAL50-0R1F8 RES CHAS MNT 0.1 OHM 1% 50W 57
UAL50-0R5F8 RES CHAS MNT 0.5 OHM 1% 50W 88
UAL50-100KF8 RES CHAS MNT 100K OHM 1% 50W 125
UAL50-10RF8 RES CHAS MNT 10 OHM 1% 50W 127
UAL50-16RF8 RES CHAS MNT 16 OHM 1% 50W 267
UAL50-1RF8 RES CHAS MNT 1 OHM 1% 50W 97
UAL50-20RF8 RES CHAS MNT 20 OHM 1% 50W 87
UAL50-300RF8 RES CHAS MNT 300 OHM 1% 50W 7
UAL50-30RF8 RES CHAS MNT 30 OHM 1% 50W 35
UAL50-3R3F8 RES CHAS MNT 3.3 OHM 1% 50W 107
UAL50-50KF8 RES CHAS MNT 50K OHM 1% 50W 3
UAL50-50RF8 RES CHAS MNT 50 OHM 1% 50W 51
UAL50-5RF8 RES CHAS MNT 5 OHM 1% 50W 479
UAL50-6RF8 RES CHAS MNT 6 OHM 1% 50W 87
UAL50-75RF8 RES CHAS MNT 75 OHM 1% 50W 298
UAL5-0R5F8 RES CHAS MNT 0.5 OHM 1% 7.5W 572
UAL5-150RF8 RES CHAS MNT 150 OHM 1% 7.5W 73
UAL5-1RF8 RES CHAS MNT 1 OHM 1% 7.5W 81
UAL5-390RF8 RES CHAS MNT 390 OHM 1% 7.5W 5
UAL50-0R2F8 RES CHAS MNT 0.2 OHM 1% 50W 66