3FD-228

Power Transformers Overview

The Tamura 3FD-228 is a laminated core power transformer designed for through-hole mounting. It features dual primary windings supporting 115V and 230V inputs in parallel configuration. The secondary output provides dual windings with 14V at 80mA (parallel) or 28V at 40mA (series). Rated at 1.1VA, it offers 2500Vrms isolation voltage. Physical dimensions are 34.93mm length, 28.56mm width, and 23.80mm maximum height.

Power Transformers Feature Summary

• Dual primary winding configuration for flexible 115V or 230V AC input selection
• Dual secondary winding design allowing parallel or series connection options
• Laminated core construction for standard power transformation applications

Power Transformers Applications

• General purpose AC to DC power supply circuits
• Industrial control equipment requiring isolated low-voltage DC
• Consumer electronics utilizing standard wall-wart style internal transformers

Power Transformers Procurement Notes

Verify the specific datasheet version for the 3FD-228 to confirm RoHS compliance status and exact pinout configurations before integration. Ensure that the selected mounting orientation accommodates the specified maximum height of 23.80mm within the enclosure design constraints. Cross-reference electrical ratings against the load requirements to prevent saturation under peak operating conditions.

Power Transformers Selection Notes

Select this component when a 1.1VA rating suffices for the target circuit load. The dual primary capability simplifies global distribution by accommodating both 115V and 230V mains without variant changes. Consider the physical footprint of 34.93mm x 28.56mm during PCB layout planning to ensure adequate clearance for through-hole pins and surrounding components.

Power Transformers Part Context

This part belongs to Tamura's general-purpose laminated core transformer lineup. These components are widely used in legacy and modern designs requiring reliable galvanic isolation between mains and low-voltage DC sections. The 3FD series typically utilizes epoxy encapsulation for environmental protection and mechanical stability in standard industrial environments.

Power Transformers Replacement Considerations

Triad Magnetics FS28-040 shares identical 1.1VA rating, 115/230V primary, and 14V/28V secondary specifications. Verify pin-to-pin compatibility and physical envelope dimensions before substitution to ensure board fitment.