F-257U

Overview

The Triad Magnetics F-257U is a laminated core power transformer designed for industrial applications. It features a 115V primary voltage and provides a 20.0V center-tapped secondary output capable of delivering 6.0A. The unit has a 120VA power rating and operates at 50Hz. Key electrical specifications include 1500Vrms isolation voltage and a maximum seated height of 95.25mm. The transformer weighs approximately 2.6 kg (5.7 lbs) and utilizes chassis mounting with leads.

Feature Summary

• Laminated core construction for stable power transformation
• Center-tapped secondary winding configuration
• High isolation voltage rating for safety compliance
• Chassis mount design with integrated leads

Applications

• Industrial power supply units
• Equipment requiring 115V to 20Vct step-down conversion
• Rectifier and filter circuit integration
• Heavy-duty electronic systems

Procurement Notes

Verify the specific datasheet version prior to ordering, as industrial components may undergo specification updates. Confirm that the 115V primary input matches your system's voltage requirements. Ensure chassis mounting space accommodates the 95.25mm height and 2.6kg weight. Check lead length and terminal compatibility with your assembly process. Validate RoHS and REACH compliance status against current regulatory standards for your region.

Selection Notes

Select this model when a robust 120VA transformer is needed for 115V primary systems. The 20Vct secondary suits bridge rectifier applications requiring higher current capacity than smaller transformers. Consider the physical dimensions and weight for mechanical enclosure design. This component is suitable for environments where high isolation and thermal stability are critical. Evaluate if the fixed 50Hz frequency aligns with your operational power source.

Part Context

The F-257U belongs to Triad Magnetics' industrial power transformer lineup. These components are engineered for durability in demanding environments. The series typically supports various voltage configurations and power ratings. This specific part emphasizes high current delivery and safety isolation. It complements Triad's portfolio of transformers for rectifier and filter circuits.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify pinout and dimensional compatibility before considering alternative manufacturers. Cross-reference electrical ratings strictly to ensure equivalent performance.