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Made in Salisbury, MD USA   |   (888) 286-7643    |   ISO 9001 Certified click icon to download


Custom Transformers

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Panels & Harnesses

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Standard Transformers

Shop our Standard Design Toroidal Transformers.

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Dimmable Lamp Transformers

These transformers are dimmable without noticeable hum when used with many high quality dimmers. Please try it out in your application before ordering in quantity.

  • UL recognized to UL506
  • CUL certified to CSA C22.2 No. 66 standards
  • ROHS compliant. Class B (130ºC) Insulation
  • Low Temperature Rise
  • Excellent Voltage Regulation
  • Low Mechanical Noise
  • Light Weight
  • Low Profile


Primary: 117VAC/60Hz
Secondary: 11.8VAC
Order TCM
Part No.
Power O.D. Height Weight No-Load
Temp. Rise/
Full Load
U1501 20W 2.4" 1.2" 0.8 lbs. 14.1V 38ºC
U1502 50W 3.2" 1.3" 1.5 lbs. 13.4V 41ºC
Price U1503 75W 3.5" 1.5" 2.1 lbs. 12.9V 35ºC
Price U1504 100W 3.7" 1.6" 2.5 lbs. 12.9V 40ºC
Price U1505 125W 3.9" 1.6" 2.8 lbs. 12.8V 46ºC
Price U1506 150W 3.9" 1.8" 3.3 lbs. 12.8V 47ºC
Price U1507 300W 5.0" 2.0" 5.5 lbs. 12.5V 48ºC
Price U1508 500W 5.5" 2.5" 9.1 lbs. 12.3V 46ºC
 Price  U1509 750W  6.4" 2.5" 12.6 lbs. 12.2V 45ºC
Price   U1510 1000W  6.4" 3.2" 16.9 lbs. 12.2V  46ºC
Note: The temperature rise of a toroidal power transformer operating at 50% of full load will be only 25% of the temperature rise shown above at full load. Recommended by GE for optimum Halogen Lamp Life and Performance
Need custom specifications for your transformer? Click here.
UL and CUL Agency Files
UL and CUL have issued the following reference (file) numbers for our construction approvals received for all our standard designs and over 500 custom designs.

Smaller transformers are supplied with one metal washer and two rubber pads, for power ratings up to 800VA. Larger transformers are typically supplied with an epoxy potted center with a hole for mounting.  Other mounting options are available.

Safety Standard
UL 506 (Non-medical)
CSA C 22.2 No 66
Agency Reference
UL file E-161696
C-UL file E-161696
Detailed datasheets are available for
all listed part numbers.
Caution - If you choose to apply your own mounting solution, remember that it is important that our transformer be mounted in such a way that the mounting screw and the metal chassis will not form a closed loop through the center and thereby create a shorted turn on the transformer.

Terms and Conditions

  • For larger quantity prices, please contact the factory directly.
  • Prices and data subject to change without prior notice
  • Delivery: Small quantities of standards are normally available from stock
  • 30-Day Return Policy of Undamaged Items - 15% Restocking Fee on Standard Transformers
  • 36 Month Product Warranty
  • Terms and Conditions