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MCI Transformer Corporation 4-53 Series chassis mount autotransformers
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MCI 4-53 Series

115/277V Autotransformers

The MCI 4-53 Series chassis mount autotransformers provide the most cost effective solution for voltage conversion when electrical isolation is not required.

Standard products range from 50VA to 5000VA and can either step up 115V to 277V or step down 277V to 115V 50/60hz (Bi-Directional). These open frame transformers are provided with color coded stranded lead wires 12″ long and stripped 1/2 inch from lead end to make installation in any equipment easy.

All models are made with Class F (155 degree C) insulation consistent with high temperature construction. Dielectric strength 2500VRMS Hipot Mounting options include Channel frame style for lower VA sizes and “L” Brackets for larger sizes. Other Voltage combinations and additional power ratings are available on a special order basis. Adaptations of standard transformers are also available.

MCI 4-53 Series
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MCI 4-53 Series
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Product Dimensions

Dimensions included below in Parts List

Output Voltage & Current Rating (AMPS RMS)

VA L H W ML MW A B Lead UL3271 Length  Weight  Style
4-53-0050 3.25 1.98 1.7 2.81 --- 2.4 0.9 18 AWG 12" 1 A
4-53-0100 3.25 1.98 2.2 2.81 --- 2.4 1.4 18 AWG 12" 1.6 A
4-53-0250 3.38 2.81 2.6 2.81 2.25 --- --- 18 AWG 12" 3.7 B
4-53-0500 3.75 3.13 3.7 3.13 3 --- --- 18 AWG 12" 6.6 B
4-53-1000 5.25 4.38 4.1 4.38 3.13 --- --- 14 AWG 12" 14.3 B
4-53-2000 5.25 4.38 6 4.38 5.13 --- --- 12 AWG 12" 25.5 B
4-53-3000 7.5 6.25 6 6.75 3.72 --- --- 12 AWG 12" 36 B
4-53-5000 7.5 6.25 7.7 6.75 5.46 --- ---  8AWG 12" 57.2 B
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