RS PRO 250VA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary

RS PRO 250 VA Enclosed Autotransformer, 220 V AC, 230 V AC, 240 V AC Primary, 115 V AC Secondary

RS PRO's enclosed autotransformer provides an efficient way to reduce power supply voltage. Its primary rated voltage is 220 V AC, 230 V AC or 240 V AC, and the secondary voltage is 115 V AC. This means you can use it to operate US equipment at higher European voltages.


The autotransformer's four-hole fixings and compact construction mean it's easy to install in a variety of locations. It's fully shrouded to prevent electrical interference and has a varnish-impregnated coil for increased dielectric strength. Its terminal blocks are equipped with a protective cover, and the device has undergone extensive electrical and flash testing to ensure safe high-voltage use.


This autotransformer is suitable for many applications, including induction motor starting and transmission line voltage regulation. It does not provide mains isolation.

Features and Benefits

• Chassis mounting, floor standing or wall mounting


• Single phase


• Power rating of 250 VA


• Operating frequency range of 50 to 60 Hz


• Length of 81 mm


• Width of 136 mm


• Depth of 100 mm


• Efficiency of 94.7%


• Weight of 2.6 kg


• Meets standard EN 61558 for transformer safety

RS PRO Datasheet