Tranformer Current Table Page


Determine the voltage of the application and then click on the highlighted text below to find the correct table for your application.



Select here for 115 VAC to 347 VAC winding voltage on single phase transformers.
Select here for 380 VAC to 600 VAC winding voltage on single phase transformers.
Select here for 115 VAC to 347 VAC winding voltage on three phase transformers.
Select here for 380 VAC to 600 VAC winding voltage on three phase transformers.
Notes:



Find the VA rating and applied voltage of your transformer on the table below to determine the amp rating of the transformer.

Chart of Transformer VA, Applied Voltage, and Rated Current for Single Phase Applications, voltages of

115 VAC to 347 VAC.

VA 115 vac 120 vac 200 vac 208 vac 220 vac 230 vac 240 vac 277 vac 347 vac
25VA 0.2174 0.2083 0.125 0.1202 0.1136 0.1087 0.1042 0.09025 0.07205
50VA 0.4348 0.4167 0.25 0.2404 0.2273 0.2174 0.2083 0.1805 0.1441
75VA 0.6522 0.625 0.375 0.3606 0.3409 0.3261 0.3125 0.2708 0.2161
100VA 0.8696 0.8333 0.5 0.4808 0.4545 0.4348 0.4167 0.361 0.2882
150VA 1.304 1.25 0.75 0.7212 0.6818 0.6522 0.625 0.5415 0.4323
200VA 1.739 1.667 1 0.9615 0.9091 0.8696 0.8333 0.722 0.5764
250VA 2.174 2.083 1.25 1.202 1.136 1.087 1.042 0.9025 0.7205
300VA 2.609 2.5 1.5 1.442 1.364 1.304 1.25 1.083 0.8646
350VA 3.043 2.917 1.75 1.683 1.591 1.522 1.458 1.264 1.009
500VA 4.348 4.167 2.5 2.404 2.273 2.174 2.083 1.805 1.441
750VA 6.522 6.25 3.75 3.606 3.409 3.261 3.125 2.708 2.161
1000VA 8.696 8.333 5 4.808 4.545 4.348 4.167 3.61 2.882
1500VA 13.04 12.5 7.5 7.212 6.818 6.522 6.25 5.415 4.323
2000VA 17.39 16.67 10 9.615 9.091 8.696 8.333 7.22 5.764
3000VA 26.09 25 15 14.42 13.64 13.04 12.5 10.83 8.646
5000VA 43.48 41.67 25 24.04 22.73 21.74 20.83 18.05 14.41
7500 65.22 62.5 37.5 36.06 34.09 32.61 31.25 27.08 21.61
10000 86.96 83.33 50 48.08 45.45 43.48 41.67 36.1 28.82
15000 130.4 125 75 72.12 68.18 65.22 62.5 54.15 43.23
20000 173.9 166.7 100 96.15 90.91 86.96 83.33 72.2 57.64
30000 260.9 250 150 144.2 136.4 130.4 125 108.3 86.46
50000 434.8 416.7 250 240.4 227.3 217.4 208.3 180.5 144.1
75000 652.2 625 375 360.6 340.9 326.1 312.5 270.8 216.1
100000 869.6 833.3 500 480.8 454.5 434.8 416.7 361 288.2
150000 1304 1250 750 721.2 681.8 652.2 625 541.5 432.3
200000 1739 1667 1000 961.5 909.1 869.6 833.3 722 576.4
300000 2609 2500 1500 1442 1364 1304 1250 1083 864.6
500000 4348 4167 2500 2404 2273 2174 2083 1805 1441



Chart of Transformer VA, Applied Voltage, and Rated Current for Single Phase Applications, voltages of

380 VAC to 600 VAC.

VA 380 vac 400 vac 415 vac 440 vac 460 vac 480 vac 550 vac 575 vac 600 vac
25VA 0.06579 0.0625 0.06024 0.05682 0.05435 0.05208 0.04545 0.04348 0.04167
50VA 0.1316 0.125 0.1205 0.1136 0.1087 0.1042 0.09091 0.08696 0.08333
75VA 0.1974 0.1875 0.1807 0.1705 0.163 0.1563 0.1364 0.1304 0.125
100VA 0.2632 0.25 0.241 0.2273 0.2174 0.2083 0.1818 0.1739 0.1667
150VA 0.3947 0.375 0.3614 0.3409 0.3261 0.3125 0.2727 0.2609 0.25
200VA 0.5263 0.5 0.4819 0.4545 0.4348 0.4167 0.3636 0.3478 0.3333
250VA 0.6579 0.625 0.6024 0.5682 0.5435 0.5208 0.4545 0.4348 0.4167
300VA 0.7895 0.75 0.7229 0.6818 0.6522 0.625 0.5455 0.5217 0.5
350VA 0.9211 0.875 0.8434 0.7955 0.7609 0.7292 0.6364 0.6087 0.5833
500VA 1.316 1.25 1.205 1.136 1.087 1.042 0.9091 0.8696 0.8333
750VA 1.974 1.875 1.807 1.705 1.63 1.563 1.364 1.304 1.25
1000VA 2.632 2.5 2.41 2.273 2.174 2.083 1.818 1.739 1.667
1500VA 3.947 3.75 3.614 3.409 3.261 3.125 2.727 2.609 2.5
2000VA 5.263 5 4.819 4.545 4.348 4.167 3.636 3.478 3.333
3000VA 7.895 7.5 7.229 6.818 6.522 6.25 5.455 5.217 5
5000VA 13.16 12.5 12.05 11.36 10.87 10.42 9.091 8.696 8.333
7500 19.74 18.75 18.07 17.05 16.3 15.63 13.64 13.04 12.5
10000 26.32 25 24.1 22.73 21.74 20.83 18.18 17.39 16.67
15000 39.47 37.5 36.14 34.09 32.61 31.25 27.27 26.09 25
20000 52.63 50 48.19 45.45 43.48 41.67 36.36 34.78 33.33
30000 78.95 75 72.29 68.18 65.22 62.5 54.55 52.17 50
50000 131.6 125 120.5 113.6 108.7 104.2 90.91 86.96 83.33
75000 197.4 187.5 180.7 170.5 163 156.3 136.4 130.4 125
100000 263.2 250 241 227.3 217.4 208.3 181.8 173.9 166.7
150000 394.7 375 361.4 340.9 326.1 312.5 272.7 260.9 250
200000 526.3 500 481.9 454.5 434.8 416.7 363.6 347.8 333.3
300000 789.5 750 722.9 681.8 652.2 625 545.5 521.7 500
500000 1316 1250 1205 1136 1087 1042 909.1 869.6 833.3



Chart of Transformer VA, Applied Voltage, and Rated Current for Three Phase Applications, voltages of

115 VAC to 347 VAC.

VA 115 vac 120 vac 200 vac 208 vac 220 vac 230 vac 240 vac 277 vac 347 vac
25VA 0.1255 0.1203 0.07217 0.06939 0.06561 0.06276 0.06014 0.05211 0.0416
50VA 0.251 0.2406 0.1443 0.1388 0.1312 0.1255 0.1203 0.1042 0.08319
75VA 0.3765 0.3608 0.2165 0.2082 0.1968 0.1883 0.1804 0.1563 0.1248
100VA 0.502 0.4811 0.2887 0.2776 0.2624 0.251 0.2406 0.2084 0.1664
150VA 0.7531 0.7217 0.433 0.4164 0.3936 0.3765 0.3608 0.3126 0.2496
200VA 1.004 0.9623 0.5774 0.5551 0.5249 0.502 0.4811 0.4169 0.3328
250VA 1.255 1.203 0.7217 0.6939 0.6561 0.6276 0.6014 0.5211 0.416
300VA 1.506 1.443 0.866 0.8327 0.7873 0.7531 0.7217 0.6253 0.4992
350VA 1.757 1.684 1.01 0.9715 0.9185 0.8786 0.842 0.7295 0.5823
500VA 2.51 2.406 1.443 1.388 1.312 1.255 1.203 1.042 0.8319
750VA 3.765 3.608 2.165 2.082 1.968 1.883 1.804 1.563 1.248
1000VA 5.02 4.811 2.887 2.776 2.624 2.51 2.406 2.084 1.664
1500VA 7.531 7.217 4.33 4.164 3.936 3.765 3.608 3.126 2.496
2000VA 10.04 9.623 5.774 5.551 5.249 5.02 4.811 4.169 3.328
3000VA 15.06 14.43 8.66 8.327 7.873 7.531 7.217 6.253 4.992
5000VA 25.1 24.06 14.43 13.88 13.12 12.55 12.03 10.42 8.319
7500 37.65 36.08 21.65 20.82 19.68 18.83 18.04 15.63 12.48
10000 50.2 48.11 28.87 27.76 26.24 25.1 24.06 20.84 16.64
15000 75.31 72.17 43.3 41.64 39.36 37.65 36.08 31.26 24.96
20000 100.4 96.23 57.74 55.51 52.49 50.2 48.11 41.69 33.28
30000 150.6 144.3 86.6 83.27 78.73 75.31 72.17 62.53 49.92
50000 251 240.6 144.3 138.8 131.2 125.5 120.3 104.2 83.19
75000 376.5 360.8 216.5 208.2 196.8 188.3 180.4 156.3 124.8
100000 502 481.1 288.7 277.6 262.4 251 240.6 208.4 166.4
150000 753.1 721.7 433 416.4 393.6 376.5 360.8 312.6 249.6
200000 1004 962.3 577.4 555.1 524.9 502 481.1 416.9 332.8
300000 1506 1443 866 832.7 787.3 753.1 721.7 625.3 499.2
500000 2510 2406 1443 1388 1312 1255 1203 1042 831.9



Chart of Transformer VA, Applied Voltage, and Rated Current for Three Phase Applications, voltages of

380 VAC to 600 VAC.

VA 380 vac 400 vac 415 vac 440 vac 460 vac 480 vac 550 vac 575 vac 600 vac
25VA 0.03798 0.03608 0.03478 0.0328 0.03138 0.03007 0.02624 0.0251 0.02406
50VA 0.07597 0.07217 0.06956 0.06561 0.06276 0.06014 0.05249 0.0502 0.04811
75VA 0.114 0.1083 0.1043 0.09841 0.09413 0.09021 0.07873 0.07531 0.07217
100VA 0.1519 0.1443 0.1391 0.1312 0.1255 0.1203 0.105 0.1004 0.09623
150VA 0.2279 0.2165 0.2087 0.1968 0.1883 0.1804 0.1575 0.1506 0.1443
200VA 0.3039 0.2887 0.2782 0.2624 0.251 0.2406 0.2099 0.2008 0.1925
250VA 0.3798 0.3608 0.3478 0.328 0.3138 0.3007 0.2624 0.251 0.2406
300VA 0.4558 0.433 0.4174 0.3936 0.3765 0.3608 0.3149 0.3012 0.2887
350VA 0.5318 0.5052 0.4869 0.4593 0.4393 0.421 0.3674 0.3514 0.3368
500VA 0.7597 0.7217 0.6956 0.6561 0.6276 0.6014 0.5249 0.502 0.4811
750VA 1.14 1.083 1.043 0.9841 0.9413 0.9021 0.7873 0.7531 0.7217
1000VA 1.519 1.443 1.391 1.312 1.255 1.203 1.05 1.004 0.9623
1500VA 2.279 2.165 2.087 1.968 1.883 1.804 1.575 1.506 1.443
2000VA 3.039 2.887 2.782 2.624 2.51 2.406 2.099 2.008 1.925
3000VA 4.558 4.33 4.174 3.936 3.765 3.608 3.149 3.012 2.887
5000VA 7.597 7.217 6.956 6.561 6.276 6.014 5.249 5.02 4.811
7500 11.4 10.83 10.43 9.841 9.413 9.021 7.873 7.531 7.217
10000 15.19 14.43 13.91 13.12 12.55 12.03 10.5 10.04 9.623
15000 22.79 21.65 20.87 19.68 18.83 18.04 15.75 15.06 14.43
20000 30.39 28.87 27.82 26.24 25.1 24.06 20.99 20.08 19.25
30000 45.58 43.3 41.74 39.36 37.65 36.08 31.49 30.12 28.87
50000 75.97 72.17 69.56 65.61 62.76 60.14 52.49 50.2 48.11
75000 114 108.3 104.3 98.41 94.13 90.21 78.73 75.31 72.17
100000 151.9 144.3 139.1 131.2 125.5 120.3 105 100.4 96.23
150000 227.9 216.5 208.7 196.8 188.3 180.4 157.5 150.6 144.3
200000 303.9 288.7 278.2 262.4 251 240.6 209.9 200.8 192.5
300000 455.8 433 417.4 393.6 376.5 360.8 314.9 301.2 288.7
500000 759.7 721.7 695.6 656.1 627.6 601.4 524.9 502 481.1

Notes:
#1. For single phase transformers, the values are based on the formula:
Current = {VA/Vac}
#2. For three phase transformers, the values are based on the formula:
Current = {VA/(Vac*1.73)}
#3. These values are for educational purposes only.
Due to the wide range of circuit applications, the author assumes no responsibility for the application of these values.


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