C. 550 Volt Primary Single Phase Isolation Transformers
TEMCo Single Phase Isolation Transformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty.
• UL Listed, CSA Approved
• Aluminum or Copper windings
• 50/60 Hz rated
• NEMA 3R Enclosure (for indoor or outdoor use)
Looking for a different specification? See all the primary voltage configurations here.
Select a Different Primary Configuration »
Secondary Voltages Selection | |
1. 600 | 15. 277 |
2. 575 | 16. 240 |
3. 550 | 17. 120/240 |
4. 480 | 18. 230 |
5. 240/480 | 19. 115/230 |
6. 460 | 20. 220 |
7. 230/460 | 21. 110/220 |
8. 440 | 22. 208 |
9. 220/440 | 23. 200 |
10. 416 | 24. 190 |
11. 208/416 | 25. 120 |
12. 400 | 26. 115 |
13. 380 | 27. 110 |
14. 347 | 28. 100 |
1. 550V Primary - 600 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 5 | - | T28088 |
5 | 8.33 | - | T28089 |
7.5 | 12.5 | - | T28090 |
10 | 16.67 | T17101 | T28091 |
15 | 25 | T17102 | T28092 |
25 | 41.67 | T17103 | T28093 |
37.5 | 62.5 | T17104 | T28094 |
50 | 83.33 | T17105 | T28095 |
75 | 125 | T17106 | T28096 |
100 | 166.67 | T17107 | T28097 |
167 | 278.33 | T17108 | T28098 |
200 | 333.33 | T17109 | T28099 |
250 | 416.67 | T17110 | T28100 |
330 | 550 | T17111 | T28101 |
2. 550V Primary - 575 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 5.22 | - | T28102 |
5 | 8.70 | - | T28103 |
7.5 | 13.04 | - | T28104 |
10 | 17.39 | T17115 | T28105 |
15 | 26.09 | T17116 | T28106 |
25 | 43.48 | T17117 | T28107 |
37.5 | 65.22 | T17118 | T28108 |
50 | 86.96 | T17119 | T28109 |
75 | 130.43 | T17120 | T28110 |
100 | 173.91 | T17121 | T28111 |
167 | 290.43 | T17122 | T28112 |
200 | 347.83 | T17123 | T28113 |
250 | 434.78 | T17124 | T28114 |
330 | 573.91 | T17125 | T28115 |
3. 550V Primary - 550 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 5.45 | - | T28116 |
5 | 9.09 | - | T28117 |
7.5 | 13.64 | - | T28118 |
10 | 18.18 | T17129 | T28119 |
15 | 27.27 | T17130 | T28120 |
25 | 45.45 | T17131 | T28121 |
37.5 | 68.18 | T17132 | T28122 |
50 | 90.91 | T17133 | T28123 |
75 | 136.36 | T17134 | T28124 |
100 | 181.82 | T17135 | T28125 |
167 | 303.64 | T17136 | T28126 |
200 | 363.64 | T17137 | T28127 |
250 | 454.55 | T17138 | T28128 |
330 | 600 | T17139 | T28129 |
4. 550V Primary - 480 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 6.25 | - | T28130 |
5 | 10.42 | - | T28131 |
7.5 | 15.63 | - | T28132 |
10 | 20.83 | T17143 | T28133 |
15 | 31.25 | T17144 | T28134 |
25 | 52.08 | T17145 | T28135 |
37.5 | 78.13 | T17146 | T28136 |
50 | 104.17 | T17147 | T28137 |
75 | 156.25 | T17148 | T28138 |
100 | 208.33 | T17149 | T28139 |
167 | 347.92 | T17150 | T28140 |
200 | 416.67 | T17151 | T28141 |
250 | 520.83 | T17152 | T28142 |
330 | 687.50 | T17153 | T28143 |
5. 550V Primary - 240/480 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 12.5/6.25 | - | T28144 |
5 | 20.83/10.42 | - | T28145 |
7.5 | 31.25/15.63 | - | T28146 |
10 | 41.67/20.83 | T17157 | T28147 |
15 | 62.5/31.25 | T17158 | T28148 |
25 | 104.17/52.08 | T17159 | T28149 |
37.5 | 156.25/78.13 | T17160 | T28150 |
50 | 208.33/104.17 | T17161 | T28151 |
75 | 312.5/156.25 | T17162 | T28152 |
100 | 416.67/208.33 | T17163 | T28153 |
167 | 695.83/347.92 | T17164 | T28154 |
200 | 833.33/416.67 | T17165 | T28155 |
250 | 1041.67/520.83 | T17166 | T28156 |
330 | 1375/687.5 | T17167 | T28157 |
6. 550V Primary - 460 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 6.52 | - | T28158 |
5 | 10.87 | - | T28159 |
7.5 | 16.30 | - | T28160 |
10 | 21.74 | T17171 | T28161 |
15 | 32.61 | T17172 | T28162 |
25 | 54.35 | T17173 | T28163 |
37.5 | 81.52 | T17174 | T28164 |
50 | 108.70 | T17175 | T28165 |
75 | 163.04 | T17176 | T28166 |
100 | 217.39 | T17177 | T28167 |
167 | 363.04 | T17178 | T28168 |
200 | 434.78 | T17179 | T28169 |
250 | 543.48 | T17180 | T28170 |
330 | 717.39 | T17181 | T28171 |
7. 550V Primary - 230/460 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 13.04/6.52 | - | T28172 |
5 | 21.74/10.87 | - | T28173 |
7.5 | 32.61/16.3 | - | T28174 |
10 | 43.48/21.74 | T17185 | T28175 |
15 | 65.22/32.61 | T17186 | T28176 |
25 | 108.7/54.35 | T17187 | T28177 |
37.5 | 163.04/81.52 | T17188 | T28178 |
50 | 217.39/108.7 | T17189 | T28179 |
75 | 326.09/163.04 | T17190 | T28180 |
100 | 434.78/217.39 | T17191 | T28181 |
167 | 726.09/363.04 | T17192 | T28182 |
200 | 869.57/434.78 | T17193 | T28183 |
250 | 1086.96/543.48 | T17194 | T28184 |
330 | 1434.78/717.39 | T17195 | T28185 |
8. 550V Primary - 440 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 6.82 | - | T28186 |
5 | 11.36 | - | T28187 |
7.5 | 17.05 | - | T28188 |
10 | 22.73 | T17199 | T28189 |
15 | 34.09 | T17200 | T28190 |
25 | 56.82 | T17201 | T28191 |
37.5 | 85.23 | T17202 | T28192 |
50 | 113.64 | T17203 | T28193 |
75 | 170.45 | T17204 | T28194 |
100 | 227.27 | T17205 | T28195 |
167 | 379.55 | T17206 | T28196 |
200 | 454.55 | T17207 | T28197 |
250 | 568.18 | T17208 | T28198 |
330 | 750 | T17209 | T28199 |
9. 550V Primary - 220/440 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 13.64/6.82 | - | T28200 |
5 | 22.73/11.36 | - | T28201 |
7.5 | 34.09/17.05 | - | T28202 |
10 | 45.45/22.73 | T17213 | T28203 |
15 | 68.18/34.09 | T17214 | T28204 |
25 | 113.64/56.82 | T17215 | T28205 |
37.5 | 170.45/85.23 | T17216 | T28206 |
50 | 227.27/113.64 | T17217 | T28207 |
75 | 340.91/170.45 | T17218 | T28208 |
100 | 454.55/227.27 | T17219 | T28209 |
167 | 759.09/379.55 | T17220 | T28210 |
200 | 909.09/454.55 | T17221 | T28211 |
250 | 1136.36/568.18 | T17222 | T28212 |
330 | 1500/750 | T17223 | T28213 |
10. 550V Primary - 416 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 7.21 | - | T28214 |
5 | 12.02 | - | T28215 |
7.5 | 18.03 | - | T28216 |
10 | 24.04 | T17227 | T28217 |
15 | 36.06 | T17228 | T28218 |
25 | 60.10 | T17229 | T28219 |
37.5 | 90.14 | T17230 | T28220 |
50 | 120.19 | T17231 | T28221 |
75 | 180.29 | T17232 | T28222 |
100 | 240.38 | T17233 | T28223 |
167 | 401.44 | T17234 | T28224 |
200 | 480.77 | T17235 | T28225 |
250 | 600.96 | T17236 | T28226 |
330 | 793.27 | T17237 | T28227 |
11. 550V Primary - 208/416 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 14.42/7.21 | - | T28228 |
5 | 24.04/12.02 | - | T28229 |
7.5 | 36.06/18.03 | - | T28230 |
10 | 48.08/24.04 | T17241 | T28231 |
15 | 72.12/36.06 | T17242 | T28232 |
25 | 120.19/60.1 | T17243 | T28233 |
37.5 | 180.29/90.14 | T17244 | T28234 |
50 | 240.38/120.19 | T17245 | T28235 |
75 | 360.58/180.29 | T17246 | T28236 |
100 | 480.77/240.38 | T17247 | T28237 |
167 | 802.88/401.44 | T17248 | T28238 |
200 | 961.54/480.77 | T17249 | T28239 |
250 | 1201.92/600.96 | T17250 | T28240 |
330 | 1586.54/793.27 | T17251 | T28241 |
12. 550V Primary - 400 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 7.5 | - | T28242 |
5 | 12.5 | - | T28243 |
7.5 | 18.75 | - | T28244 |
10 | 25 | T17255 | T28245 |
15 | 37.5 | T17256 | T28246 |
25 | 62.5 | T17257 | T28247 |
37.5 | 93.75 | T17258 | T28248 |
50 | 125 | T17259 | T28249 |
75 | 187.5 | T17260 | T28250 |
100 | 250 | T17261 | T28251 |
167 | 417.5 | T17262 | T28252 |
200 | 500 | T17263 | T28253 |
250 | 625 | T17264 | T28254 |
330 | 825 | T17265 | T28255 |
13. 550V Primary - 380 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 7.89 | - | T28256 |
5 | 13.16 | - | T28257 |
7.5 | 19.74 | - | T28258 |
10 | 26.32 | T17269 | T28259 |
15 | 39.47 | T17270 | T28260 |
25 | 65.79 | T17271 | T28261 |
37.5 | 98.68 | T17272 | T28262 |
50 | 131.58 | T17273 | T28263 |
75 | 197.37 | T17274 | T28264 |
100 | 263.16 | T17275 | T28265 |
167 | 439.47 | T17276 | T28266 |
200 | 526.32 | T17277 | T28267 |
250 | 657.89 | T17278 | T28268 |
330 | 868.42 | T17279 | T28269 |
14. 550V Primary - 347 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 8.65 | - | T28270 |
5 | 14.41 | - | T28271 |
7.5 | 21.61 | - | T28272 |
10 | 28.82 | T17283 | T28273 |
15 | 43.23 | T17284 | T28274 |
25 | 72.05 | T17285 | T28275 |
37.5 | 108.07 | T17286 | T28276 |
50 | 144.09 | T17287 | T28277 |
75 | 216.14 | T17288 | T28278 |
100 | 288.18 | T17289 | T28279 |
167 | 481.27 | T17290 | T28280 |
200 | 576.37 | T17291 | T28281 |
250 | 720.46 | T17292 | T28282 |
330 | 951.01 | T17293 | T28283 |
15. 550V Primary - 277 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 10.83 | - | T28284 |
5 | 18.05 | - | T28285 |
7.5 | 27.08 | - | T28286 |
10 | 36.10 | T17297 | T28287 |
15 | 54.15 | T17298 | T28288 |
25 | 90.25 | T17299 | T28289 |
37.5 | 135.38 | T17300 | T28290 |
50 | 180.51 | T17301 | T28291 |
75 | 270.76 | T17302 | T28292 |
100 | 361.01 | T17303 | T28293 |
167 | 602.89 | T17304 | T28294 |
200 | 722.02 | T17305 | T28295 |
250 | 902.53 | T17306 | T28296 |
330 | 1191.34 | T17307 | T28297 |
16. 550V Primary - 240 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 12.5 | - | T28298 |
5 | 20.83 | - | T28299 |
7.5 | 31.25 | - | T28300 |
10 | 41.67 | T17311 | T28301 |
15 | 62.5 | T17312 | T28302 |
25 | 104.17 | T17313 | T28303 |
37.5 | 156.25 | T17314 | T28304 |
50 | 208.33 | T17315 | T28305 |
75 | 312.5 | T17316 | T28306 |
100 | 416.67 | T17317 | T28307 |
167 | 695.83 | T17318 | T28308 |
200 | 833.33 | T17319 | T28309 |
250 | 1041.67 | T17320 | T28310 |
330 | 1375 | T17321 | T28311 |
17. 550V Primary - 120/240 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 25/12.5 | - | T28312 |
5 | 41.67/20.83 | - | T28313 |
7.5 | 62.5/31.25 | - | T28314 |
10 | 83.33/41.67 | T17325 | T28315 |
15 | 125/62.5 | T17326 | T28316 |
25 | 208.33/104.17 | T17327 | T28317 |
37.5 | 312.5/156.25 | T17328 | T28318 |
50 | 416.67/208.33 | T17329 | T28319 |
75 | 625/312.5 | T17330 | T28320 |
100 | 833.33/416.67 | T17331 | T28321 |
167 | 1391.67/695.83 | T17332 | T28322 |
200 | 1666.67/833.33 | T17333 | T28323 |
250 | 2083.33/1041.67 | T17334 | T28324 |
330 | 2750/1375 | T17335 | T28325 |
18. 550V Primary - 230 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 13.04 | - | T28326 |
5 | 21.74 | - | T28327 |
7.5 | 32.61 | - | T28328 |
10 | 43.48 | T17339 | T28329 |
15 | 65.22 | T17340 | T28330 |
25 | 108.70 | T17341 | T28331 |
37.5 | 163.04 | T17342 | T28332 |
50 | 217.39 | T17343 | T28333 |
75 | 326.09 | T17344 | T28334 |
100 | 434.78 | T17345 | T28335 |
167 | 726.09 | T17346 | T28336 |
200 | 869.57 | T17347 | T28337 |
250 | 1086.96 | T17348 | T28338 |
330 | 1434.78 | T17349 | T28339 |
19. 550V Primary - 115/230 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 26.09/13.04 | - | T28340 |
5 | 43.48/21.74 | - | T28341 |
7.5 | 65.22/32.61 | - | T28342 |
10 | 86.96/43.48 | T17353 | T28343 |
15 | 130.43/65.22 | T17354 | T28344 |
25 | 217.39/108.7 | T17355 | T28345 |
37.5 | 326.09/163.04 | T17356 | T28346 |
50 | 434.78/217.39 | T17357 | T28347 |
75 | 652.17/326.09 | T17358 | T28348 |
100 | 869.57/434.78 | T17359 | T28349 |
167 | 1452.17/726.09 | T17360 | T28350 |
200 | 1739.13/869.57 | T17361 | T28351 |
250 | 2173.91/1086.96 | T17362 | T28352 |
330 | 2869.57/1434.78 | T17363 | T28353 |
20. 550V Primary - 220 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 13.64 | - | T28354 |
5 | 22.73 | - | T28355 |
7.5 | 34.09 | - | T28356 |
10 | 45.45 | T17367 | T28357 |
15 | 68.18 | T17368 | T28358 |
25 | 113.64 | T17369 | T28359 |
37.5 | 170.45 | T17370 | T28360 |
50 | 227.27 | T17371 | T28361 |
75 | 340.91 | T17372 | T28362 |
100 | 454.55 | T17373 | T28363 |
167 | 759.09 | T17374 | T28364 |
200 | 909.09 | T17375 | T28365 |
250 | 1136.36 | T17376 | T28366 |
330 | 1500 | T17377 | T28367 |
21. 550V Primary - 110/220 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 27.27/13.64 | - | T28368 |
5 | 45.45/22.73 | - | T28369 |
7.5 | 68.18/34.09 | - | T28370 |
10 | 90.91/45.45 | T17381 | T28371 |
15 | 136.36/68.18 | T17382 | T28372 |
25 | 227.27/113.64 | T17383 | T28373 |
37.5 | 340.91/170.45 | T17384 | T28374 |
50 | 454.55/227.27 | T17385 | T28375 |
75 | 681.82/340.91 | T17386 | T28376 |
100 | 909.09/454.55 | T17387 | T28377 |
167 | 1518.18/759.09 | T17388 | T28378 |
200 | 1818.18/909.09 | T17389 | T28379 |
250 | 2272.73/1136.36 | T17390 | T28380 |
330 | 3000/1500 | T17391 | T28381 |
22. 550V Primary - 208 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 14.42 | - | T28382 |
5 | 24.04 | - | T28383 |
7.5 | 36.06 | - | T28384 |
10 | 48.08 | T17395 | T28385 |
15 | 72.12 | T17396 | T28386 |
25 | 120.19 | T17397 | T28387 |
37.5 | 180.29 | T17398 | T28388 |
50 | 240.38 | T17399 | T28389 |
75 | 360.58 | T17400 | T28390 |
100 | 480.77 | T17401 | T28391 |
167 | 802.88 | T17402 | T28392 |
200 | 961.54 | T17403 | T28393 |
250 | 1201.92 | T17404 | T28394 |
330 | 1586.54 | T17405 | T28395 |
23. 550V Primary - 200 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 15 | - | T28396 |
5 | 25 | - | T28397 |
7.5 | 37.5 | - | T28398 |
10 | 50 | T17409 | T28399 |
15 | 75 | T17410 | T28400 |
25 | 125 | T17411 | T28401 |
37.5 | 187.5 | T17412 | T28402 |
50 | 250 | T17413 | T28403 |
75 | 375 | T17414 | T28404 |
100 | 500 | T17415 | T28405 |
167 | 835 | T17416 | T28406 |
200 | 1000 | T17417 | T28407 |
250 | 1250 | T17418 | T28408 |
330 | 1650 | T17419 | T28409 |
24. 550V Primary - 190 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 15.79 | - | T28410 |
5 | 26.32 | - | T28411 |
7.5 | 39.47 | - | T28412 |
10 | 52.63 | T17423 | T28413 |
15 | 78.95 | T17424 | T28414 |
25 | 131.58 | T17425 | T28415 |
37.5 | 197.37 | T17426 | T28416 |
50 | 263.16 | T17427 | T28417 |
75 | 394.74 | T17428 | T28418 |
100 | 526.32 | T17429 | T28419 |
167 | 878.95 | T17430 | T28420 |
200 | 1052.63 | T17431 | T28421 |
250 | 1315.79 | T17432 | T28422 |
330 | 1736.84 | T17433 | T28423 |
25. 550V Primary - 120 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 25 | - | T28424 |
5 | 41.67 | - | T28425 |
7.5 | 62.5 | - | T28426 |
10 | 83.33 | T17437 | T28427 |
15 | 125 | T17438 | T28428 |
25 | 208.33 | T17439 | T28429 |
37.5 | 312.5 | T17440 | T28430 |
50 | 416.67 | T17441 | T28431 |
75 | 625 | T17442 | T28432 |
100 | 833.33 | T17443 | T28433 |
167 | 1391.67 | T17444 | T28434 |
200 | 1666.67 | T17445 | T28435 |
250 | 2083.33 | T17446 | T28436 |
330 | 2750 | T17447 | T28437 |
26. 550V Primary - 115 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 26.09 | - | T28438 |
5 | 43.48 | - | T28439 |
7.5 | 65.22 | - | T28440 |
10 | 86.96 | T17451 | T28441 |
15 | 130.43 | T17452 | T28442 |
25 | 217.39 | T17453 | T28443 |
37.5 | 326.09 | T17454 | T28444 |
50 | 434.78 | T17455 | T28445 |
75 | 652.17 | T17456 | T28446 |
100 | 869.57 | T17457 | T28447 |
167 | 1452.17 | T17458 | T28448 |
200 | 1739.13 | T17459 | T28449 |
250 | 2173.91 | T17460 | T28450 |
330 | 2869.57 | T17461 | T28451 |
27. 550V Primary - 110 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 27.27 | - | T28452 |
5 | 45.45 | - | T28453 |
7.5 | 68.18 | - | T28454 |
10 | 90.91 | T17465 | T28455 |
15 | 136.36 | T17466 | T28456 |
25 | 227.27 | T17467 | T28457 |
37.5 | 340.91 | T17468 | T28458 |
50 | 454.55 | T17469 | T28459 |
75 | 681.82 | T17470 | T28460 |
100 | 909.09 | T17471 | T28461 |
167 | 1518.18 | T17472 | T28462 |
200 | 1818.18 | T17473 | T28463 |
250 | 2272.73 | T17474 | T28464 |
330 | 3000 | T17475 | T28465 |
28. 550V Primary - 100 Secondary
kVA | Output Amps | Aluminum | Copper |
3 | 30 | - | T28466 |
5 | 50 | - | T28467 |
7.5 | 75 | - | T28468 |
10 | 100 | T17479 | T28469 |
15 | 150 | T17480 | T28470 |
25 | 250 | T17481 | T28471 |
37.5 | 375 | T17482 | T28472 |
50 | 500 | T17483 | T28473 |
75 | 750 | T17484 | T28474 |
100 | 1000 | T17485 | T28475 |
167 | 1670 | T17486 | T28476 |
200 | 2000 | T17487 | T28477 |
250 | 2500 | T17488 | T28478 |
330 | 3300 | T17489 | T28479 |