ADH20028

Power Transformers Overview

The ADH20028 is a 1.1VA laminated power transformer from Zettler Magnetics, designed for through-hole mounting. It features a primary winding configuration supporting 115V or 230VAC input via parallel connection at 50/60Hz. The secondary output provides dual voltages: 14V at 80mA in parallel mode, and 28V at 40mA in series mode. This component utilizes an open-frame construction suitable for general-purpose power supply applications requiring reliable voltage transformation.

Power Transformers Feature Summary

• Open-frame laminated core construction for efficient thermal dissipation
• Dual-voltage secondary output capability with configurable parallel or series connections
• Through-hole termination style for standard PCB integration

Power Transformers Applications

• General purpose AC to DC power supply circuits
• Industrial control panel power distribution
• Electronic equipment requiring isolated low-voltage AC sources

Power Transformers Procurement Notes

Verify the specific datasheet revision and physical dimensions against your PCB footprint requirements before ordering. Confirm that the operating frequency matches your system design (50/60Hz). Ensure the primary voltage selection aligns with your regional mains supply standards. Check for any RoHS compliance documentation if required by your manufacturing regulations.

Power Transformers Selection Notes

Select this model when a 1.1VA capacity is sufficient for the load requirements. Choose between the 14V/80mA or 28V/40mA secondary configurations based on downstream rectification needs. Consider the through-hole form factor if surface-mount alternatives are unsuitable for mechanical stability or thermal reasons. Verify insulation class requirements against safety standards applicable to the final product.

Power Transformers Part Context

The ADH20028 belongs to the AH/ADH series of split bobbin power transformers manufactured by Zettler Magnetics. This series offers various power ratings and voltage combinations, sharing common construction methodologies. The ADH variant typically denotes specific packaging or terminal styles within the broader family, distinguishing it from similar models like the ADH20024 or ADH20036.

Power Transformers Replacement Considerations

Direct substitutes include other ADH series units with matching VA ratings, such as the ADH20024 or ADH20036, provided secondary voltages and currents meet circuit requirements. Cross-reference pinouts and physical dimensions carefully when considering alternative brands or series.