F. 440 Volts Primary, Single Phase Autotransformers
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TEMCo Single Phase Autotransformers 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? Click here to see all the primary voltage configurations, or see our full selection of autotransformers here.
Product Selection
440V Primary, Copper Wound, 1 Phase Autotransformers
| kVA | Select Secondary Voltage Below | ||||||
| 600V | 575V | 550V | 480V | 460V | 440V | 416V | |
| 3 | T50520 | T50530 | T50540 | T50550 | T50560 | T50570 | T50580 |
| 5 | T50521 | T50531 | T50541 | T50551 | T50561 | T50571 | T50581 |
| 7 | T50522 | T50532 | T50542 | T50552 | T50562 | T50572 | T50582 |
| 10 | T50523 | T50533 | T50543 | T50553 | T50563 | T50573 | T50583 |
| 15 | T50524 | T50534 | T50544 | T50554 | T50564 | T50574 | T50584 |
| 25 | T50525 | T50535 | T50545 | T50555 | T50565 | T50575 | T50585 |
| 37 | T50526 | T50536 | T50546 | T50556 | T50566 | T50576 | T50586 |
| 50 | T50527 | T50537 | T50547 | T50557 | T50567 | T50577 | T50587 |
| 75 | T50528 | T50538 | T50548 | T50558 | T50568 | T50578 | T50588 |
| 100 | T50529 | T50539 | T50549 | T50559 | T50569 | T50579 | T50589 |
| kVA | Select Secondary Voltage Below | ||||||
| 400V | 380V | 347V | 277V | 240V | 230V | 220V | |
| 3 | T50590 | T50600 | T50610 | T50620 | T50630 | T50640 | T50650 |
| 5 | T50591 | T50601 | T50611 | T50621 | T50631 | T50641 | T50651 |
| 7 | T50592 | T50602 | T50612 | T50622 | T50632 | T50642 | T50652 |
| 10 | T50593 | T50603 | T50613 | T50623 | T50633 | T50643 | T50653 |
| 15 | T50594 | T50604 | T50614 | T50624 | T50634 | T50644 | T50654 |
| 25 | T50595 | T50605 | T50615 | T50625 | T50635 | T50645 | T50655 |
| 37 | T50596 | T50606 | T50616 | T50626 | T50636 | T50646 | T50656 |
| 50 | T50597 | T50607 | T50617 | T50627 | T50637 | T50647 | T50657 |
| 75 | T50598 | T50608 | T50618 | T50628 | T50638 | T50648 | T50658 |
| 100 | T50599 | T50609 | T50619 | T50629 | T50639 | T50649 | T50659 |
Output Amps
| kVA | Output Amps at: | |||||||||||||
| 600V | 575V | 550V | 480V | 460V | 440V | 416V | 400V | 380V | 347V | 277V | 240V | 230V | 220V | |
| 3 | 5 | 5.2 | 5.5 | 6.3 | 6.52 | 6.8 | 7.2 | 7.5 | 7.9 | 8.7 | 10.8 | 12.5 | 13 | 13.6 |
| 5 | 8.3 | 8.7 | 9.1 | 10.4 | 10.9 | 11.4 | 12 | 12.5 | 13.2 | 14.4 | 18.1 | 20.8 | 21.7 | 22.7 |
| 7 | 11.7 | 12.2 | 12.7 | 14.6 | 15.2 | 15.9 | 16.8 | 17.5 | 18.4 | 20.2 | 25.3 | 29.2 | 30.4 | 31.8 |
| 10 | 16.7 | 17.4 | 18.2 | 20.8 | 21.74 | 22.7 | 24 | 25 | 26.3 | 28.8 | 36.1 | 41.7 | 43.5 | 45.5 |
| 15 | 25 | 26.1 | 27.3 | 31.3 | 32.61 | 34.1 | 36.1 | 37.5 | 39.5 | 43.2 | 54.2 | 62.5 | 65.2 | 68.2 |
| 25 | 41.7 | 43.5 | 45.5 | 52.1 | 54.35 | 56.8 | 60.1 | 62.5 | 65.8 | 72.1 | 90.3 | 104.2 | 108.7 | 113.6 |
| 37 | 61.7 | 64.4 | 67.3 | 77.1 | 80.43 | 84.1 | 88.9 | 92.5 | 97.4 | 106.6 | 133.6 | 154.2 | 160.9 | 168.2 |
| 50 | 83.3 | 86.9 | 90.9 | 104.2 | 108.7 | 113.64 | 120.2 | 125 | 131.6 | 144.1 | 180.5 | 208.3 | 217.4 | 227.3 |
| 75 | 125 | 130.4 | 136.4 | 156.3 | 163 | 170.45 | 180.3 | 187.5 | 197.4 | 216.1 | 270.76 | 312.5 | 326.1 | 340.9 |
| 100 | 166.7 | 173.9 | 181.8 | 208.3 | 217.4 | 227.3 | 240.4 | 250 | 263.2 | 288.2 | 361.01 | 416.7 | 434.8 | 454.6 |