F28-420

Overview

The Triad Magnetics F28-420 is a laminated core power transformer designed for PCB mounting. It features a single primary winding rated for 115V and dual secondary windings providing a center-tapped output of 28.0V at 0.420A. The unit has a power rating of 12VA and utilizes through-hole termination. Physical dimensions are 2.63 inches in length, 2.19 inches in width, and 1.56 inches in height. It carries UL/cUL certification.

Feature Summary

• Utilizes a split bobbin design for nonconcentrical winding arrangement to enhance versatility in PC board applications.
• Features a laminated core construction suitable for standard power transformation requirements.
• Includes UL and cUL safety certifications for compliance in regulated environments.

Applications

• General purpose AC power conversion for electronic circuits
• Power supply stages in consumer electronics
• Industrial control panel instrumentation

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as F28-420-C2 exist with different insulation or packaging specifications. Confirm that the 115V primary voltage matches your input source. Ensure the PCB layout accommodates the through-hole pin spacing and physical footprint defined by the datasheet dimensions to prevent mechanical interference during assembly.

Selection Notes

Select this component when a 12VA capacity is sufficient for the load current requirements. The 28VCT secondary configuration is appropriate for rectification circuits requiring a center tap. Consider the through-hole mounting style if surface-mount alternatives are not feasible. Verify that the operating frequency aligns with the transformer's design specifications to maintain efficiency and thermal performance within safe limits.

Part Context

This model belongs to the Triad Magnetics F28 series, which specializes in split pack transformers. These components are engineered for high reliability in board-mounted applications. The series offers various voltage and current combinations while maintaining consistent physical form factors to simplify inventory management and design reuse across different product lines.

Replacement Considerations

Direct substitutes include the F28-420-C2 variant, which shares similar electrical characteristics but may differ in packaging or certification details. Cross-referencing with other manufacturers requires matching the 12VA rating, 115V primary, and [email protected] secondary specifications precisely to ensure functional compatibility.

FAQ

What is the winding configuration of the F28-420?

It features a single primary winding and dual secondary windings arranged in a split bobbin design.

Is the F28-420 suitable for surface mount assembly?

No, it is designed for through-hole mounting on printed circuit boards.