Step-Down Transformers | McMaster-Carr

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Transformer Voltage Function

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Output Voltage

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Labeled Primary Voltage

Labeled Power Output

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Mounting Location

Printed Circuit Board

Input Electrical Connection

Labeled Secondary Voltage

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EAR99

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240 Products

About AC to AC Voltage Transformers

For single-phase equipment, use this formula to find power output: VA = Volts × Amps

For three-phase equipment, use this formula to find power output: VA = Volts × Amps × 1.73

Enclosed Isolating AC to AC Transformers

These transformers have isolated primary and secondary coils to protect your sensitive equipment from input voltage spikes.

Enclosed Step-Up/Step-Down
AC to AC Transformers

Improve the efficiency of your equipment—wire these transformers to step your input voltage up or down by as much as 20%.

Enclosed Voltage-Stabilizing AC to AC Transformers

Protect equipment from electromagnetic interference and maintain power during three-millisecond power dips.

High-Inrush Panel-Mount AC to AC Transformers

These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays.

Touch-Safe High-Inrush
Panel-Mount AC to AC Transformers

Prevent accidental contact with live electrical connections—the screw terminals are covered or recessed. These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays.

Harsh Environment High-Inrush
Panel-Mount AC to AC Transformers

Sealed coils protect against dust, dirt, oil, and moisture. These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays.

Outlet Box/Panel-Mount
High-Inrush AC to AC Transformers

Use the included mounting plate to mount these transformers to a panel. They can handle momentary high-inrush current associated with equipment start-up.

DIN-Rail/Panel-Mount High-Inrush
AC to AC Transformers

Use with DIN-rail to install wherever you need these transformers or mount them to a panel. They can handle momentary high-inrush current associated with equipment start-up.

Circuit Board AC to AC Transformers

Convert AC voltages without taking up too much space on your circuit board.

Low-Current Panel-Mount AC to AC Transformers

Hardwire this transformer into your panel.

Low-Current AC to AC Transformers

Power low-voltage devices such as alarms and sensors.

International AC to AC Transformers

These transformers convert voltage to continuously operate at 80% of the rated power output.

Panel-Mount Variable-Voltage
AC to AC Transformers

Permanently install these transformers in panels.

Bench-Top Variable-Voltage AC to AC Transformers

Mount these portable transformers to any flat surface.

AC to DC Electromagnet Transformers

High-Speed AC to DC Electromagnet Transformers

Suitable for high-speed automated applications, these transformers reverse the magnetic current and release your electromagnet's hold faster than other electromagnet transformers.

AC to DC Electromagnet Transformers

Flip the switch to reverse the magnetic current and release your electromagnet's hold.

About AC to AC Voltage Transformers

AC to AC Voltage Transformers

Enclosed Isolating AC to AC Transformers

Enclosed Step-Up/Step-DownAC to AC Transformers

Enclosed Voltage-Stabilizing AC to AC Transformers

High-Inrush Panel-Mount AC to AC Transformers

Touch-Safe High-InrushPanel-Mount AC to AC Transformers

Harsh Environment High-InrushPanel-Mount AC to AC Transformers

Outlet Box/Panel-MountHigh-Inrush AC to AC Transformers

DIN-Rail/Panel-Mount High-InrushAC to AC Transformers

Circuit Board AC to AC Transformers

Low-Current Panel-Mount AC to AC Transformers

Low-Current AC to AC Transformers

International AC to AC Transformers

Panel-Mount Variable-VoltageAC to AC Transformers

Bench-Top Variable-Voltage AC to AC Transformers

AC to DC Electromagnet Transformers

High-Speed AC to DC Electromagnet Transformers

AC to DC Electromagnet Transformers

Enclosed Step-Up/Step-Down
AC to AC Transformers

Touch-Safe High-Inrush
Panel-Mount AC to AC Transformers

Harsh Environment High-Inrush
Panel-Mount AC to AC Transformers

Outlet Box/Panel-Mount
High-Inrush AC to AC Transformers

DIN-Rail/Panel-Mount High-Inrush
AC to AC Transformers

Panel-Mount Variable-Voltage
AC to AC Transformers