Standard set of information for any transformer requirement

Transformers are a very versatile electrical equipment that is needed in several situations. Transformers are important equipment that accompanies several industrial machines. But transformers are not only confined in factories and industries, they can be found in homes as well as they have many domestic uses.

Transformers come in all shapes and sizes and there are many different types of transformers that suit different needs. Transformers can be custom designed by professionals to specifically meet the needs and requirements of the customers or they can be purchased from among the stock.

Buying a transformer can be a little daunting if you do not know what you are looking for, because transformers can come with several different specifications including design, requirements for installation etc.

This page provides direction for people interested in submitting their transformer requirements. Keep in mind, you’re always welcome to call in your specs or send them to us through the Quote Request page.

As you may expect, our design engineers gather a standard set of information when taking transformer requirements. If you are unable to locate any of this information, we may be able to help fill in the blanks. The following list describes each specification our engineers will request.

There are some key features of the transformers that need to be considered before purchasing the transformers. The following are some of the important features:

Input Voltage

This is the amount of voltage applied to the terminals of the primary winding of the transformer. If this is the voltage coming from your wall power outlet, it would likely be 110-120 volts (for North America) or 220-240 volts (for much of the rest of the world). North American industrial applications often use 220, 240, or 277 volts. Refer to the Worldwide Voltage & Frequency Standards for more detailed information.

Input Frequency

This is the frequency of the voltage applied to the terminals of the transformer’s primary winding. If your input power comes from your wall outlet, the likely input frequency would be 50 Hz (in India/Europe) or 60 Hz (for North America). Refer to the Worldwide Voltage & Frequency Standards for more detailed information.

Output Voltage

This is the amount of voltage supplied by the transformer to the applied equipment. The equipment to be powered by the transformer will typically require a specific voltage and current for proper operation.

Output Current

This is the amount of amperage supplied by the transformer to the applied equipment. The output current (along with the output voltage) determines the output power.

Output Power (often referred to as “VA”)

This is the output voltage multiplied by the output current, and it is the main determining factor when it comes to the physical size of the transformer (the greater the output power, the larger the physical size—for comparable construction types).

Because the voltage and current of the secondary circuit may not be in phase, the actual power delivered to the load may be lower than the VA (apparent power) rating.

Physical Size Requirements

As you would expect, there is a limit to how small a transformer can be built for a required output voltage and current. However, there are different configurations that may allow us to change the shape of the transformer so it might fit the available space or enclosure.

Estimated Annual Usage

This information is good to know because it helps us determine material and price. As you would expect, the cost-per-transformer is likely to decrease with a higher annual usage amount.

Mounting Method

This is the preferred way the transformer will be attached to the equipment, and there are three common methods:

Chasis Mount

The transformer frame is mounted directly to the equipment, either by its frame or an attached bracket

PCB Surface Mount

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

PCB Through-hole Mount

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Termination Type

This is the preferred way the input and output windings will be terminated. The equipment to be powered by the transformer may also require a specific type of termination. The following termination types are commonly configured by Shreejee Electronics

Wire Leads

The transformer frame is mounted directly to the equipment, either by its frame or an attached bracket

Quick Connects

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Terminal Board

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Inline Connectors

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Bolt Terminals

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Solder Lugs

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Screw Terminals

The transformer is mounted on a printed circuit board with pads (or feet) that are soldered directly to the surface of the board.

Other Requirements

Copper Shielding Band

Some applications may require unique features, such as a Copper Shielding Band (as shown) to further reduce transformer noise.

RoHS Compliance

Some applications may require unique features, such as a Copper Quieting Band (as shown) to further reduce transformer noise.

Whatever your requirement for the transformers, Shreejee Electronics has you covered. We provide the transformers of the highest quality and are capable of providing the best solution for your need.

Need Custom Magnetics?

We work with you to build a component that fits your need perfectly.

Subscribe Newsletter

Stay up to date with industry news, new product highlights, upcoming exhibitions, webinars and other alerts for Shreejee Electronics.

  • This field is for validation purposes and should be left unchanged.