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 Variac Selector

 Portable Variacs with Cord Plug Receptacle

 Portable Variacs with Digital Volt and/or Ammeters

 Single Phase Variacs, 120VAC Input; 0-140VAC Output

 Single Phase Variacs, 120VAC Input; 0-280VAC Output

 Single Phase Variacs, 240VAC Input; 0-280VAC Output

 Single Phase Variacs, 240VAC Input; 0-560VAC Output

 Single Phase Variacs, 480VAC Input; 0-560VAC Output

 Three Phase Variacs, 240VAC Input; 0-280VAC Output

 Three Phase Variacs, 240VAC Input; 0-560VAC Output

 Three Phase Variacs, 480VAC Input; 0-560VAC Output

;VARIAC Drawings

;VARIAC Cross Reference


 Product List

Temperature & Process Controls

 Digital Panel Meters

 Pressure Transducers & Indicators

 Timers & Counters

 Data Loggers


 Variac Variable Transformers

 SCR Power Controls

 Voltage Regulators & UPS Systems


 Electric Heating Elements

 Literature List

Web Store

Repair and Calibration

Technical Data & Calculators


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Variac - Staco Variable Transformers

We offer Variac transformers (variable transformers)  with ratings from 120V to 600+ VAC single and three phase and fractional to 1000+ Amps.  Variac transformers are AC voltage controls that provide a variable AC voltage.  Their distortion free output  is ideal for sensitive electronic applications.  Variac transformers are available that boost the output voltage in excess of twice the input voltage.  Input frequencies to 2000 Hz can be accommodated on some models. 

Variac Selector assists you in the selection of the best variable transformer for your application.  This is usually the best place to start.

Other Resources:

Variac Drawings provides detailed mechanical and electrical drawings of our products when our part number is known.

Variac Literature

Variac Cross Reference identifies suitable replacements for older and obsolete variable transformers.

ISE Web Store provides pricing for some of our more popular smaller variac transformers.


Various Variac configurations are available to meet your application requirements. Open, enclosed, portable and metered test sets are available.

Many models are direct replacements for other brands such as Superior, Powerstat Ohmite & Variac. Contact ISE with the model number for any brand of transformer for an exact replacement often at less cost. Our product range includes a full line of variacs (variable transformers), voltage regulators, power conditioners, SCR power controls, instrumentation and sensing products.

For a complete listing of variable transformer (VARIAC) ratings click continue.





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ISE, Inc.
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