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General Isolation TransformersChoose your Transformer

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For Commercial Applications (Need a transformer for a Medical application?)

General Isolation Transformers

General Isolation Transformers are bare transformers that can be used for either step-up or step-down applications.  4000V hi-pot tested.

  • Standard design
  • Recognized to UL1411, C-UL and UL 506
  • C-UL Certified to CSA C22.2 No. 66
  • From 150VA to 1000VA
  • Other power ratings available upon request






General Isolation Transformers


Dual Primaries - (2 x 117V), 50-60Hz Operation
Dual Secondaries - (2 x 117V)
Part No.
Secondary Rating (RMS)No-Load
Voltage (V)
OD x H
Inches (mm)
Lbs. (Kg)
In Series
(Center Tap)
In Parallel
AC Volt
AC Amps
AC Volt
AC Amps
Price713.12021502340.641171.282x130.13.9 x 1.9 (99 x 48)3.0 (1.4)
Price718.12021900.811.622x129.54.5 x 1.8 (105 x 46)3.8 (1.7)
Price732.12023201.372.742x126.34.9 x 2.2 (114 x 56)5.9 (2.7)
Price738.12023851.653.302x125.34.9 x 2.4 (114 x 61)6.7 (3.0)
Price749.12024702.014.022x123.85.3 x 2.4 (135 x 61)8.1 (3.7)
Price767.12026702.865.722x122.76.3 x 2.3 (160 x 58)10.9 (5.0)
Price782.12028203.507.002x122.66.3 x 2.7 (160 x 69)13.1 (6.0)
Price798.120210004.278.542x121.96.4 x 3.3 (163 x 84)17.0 (7.7)

Transformers are supplied with one metal washer and two rubber pads, however other mounting options are available:


The above transformers can be ordered mounted inside a NEMA enclosure with or without fuse, receptacle and line cord with plug.

Vertical Mounting

When vertical mounting of the transformer is required we recommend using our Omega or L- brackets. Learn more at our Mounting and Hardware section.

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.

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.

General Isolation Transformers

Safety Standard
UL 1411 (Medical) 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.

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