F28-040

Overview

The Triad Magnetics F28-040 is a laminated core power transformer from the Split Pack series, designed for through-hole mounting. It features a single primary winding rated for 115V input and dual secondary windings providing parallel 14V or series 28V output configurations. The unit delivers a maximum power of 1.1VA with parallel current capacity of 80mA and series current of 40mA. It offers 2500Vrms isolation voltage and utilizes PC pin termination.

Feature Summary

• Split bobbin construction enables nonconcentrically wound design for versatile PCB applications
• Dual secondary windings support flexible parallel or series voltage configuration
• Laminated core structure provides efficient magnetic coupling for low power requirements

Applications

• PC board mounted power supply circuits
• Low power electronic equipment requiring isolated AC voltage
• Control transformers in compact industrial devices

Procurement Notes

Verify that the replacement component matches the original electrical specifications, particularly the 1.1VA power rating and 2500Vrms isolation voltage. Confirm physical dimensions and pin spacing compatibility with the existing PCB footprint to ensure proper mechanical fit and reliable soldering during assembly processes.

Selection Notes

Select this component when a split bobbin transformer is required for space-constrained PCB designs. Ensure the application demands a single primary input and dual secondary outputs. Verify that the 1.1VA power rating meets the load requirements and that the 2500Vrms isolation level satisfies safety standards for the specific equipment environment.

Part Context

This part belongs to the Triad Magnetics Split Pack series, which specializes in split bobbin transformers for printed circuit board mounting. The series offers various power ratings and voltage configurations tailored for compact electronic systems requiring reliable isolation between primary and secondary circuits in small form factors.

Replacement Considerations

Triad Magnetics F28-040-C2 serves as a verified substitute offering enhanced 4200Vrms isolation while maintaining identical electrical parameters and physical dimensions.