F-139P

Overview

The Triad Magnetics F-139P is a power transformer with a laminated core, designed for through-hole mounting. It features a single primary winding rated for 115V input. The secondary side offers dual windings providing 12.6VCT; these can be configured in series for 0.12A output or in parallel for 0.24A output. The unit has a 1.5VA power rating and provides 1500Vrms isolation voltage. Dimensions are approximately 39.7mm length, 35.3mm width, and 30.1mm height.

Feature Summary

• Single primary winding configuration for standard line voltage operation
• Dual secondary windings allowing flexible series or parallel connection
• Laminated core construction for efficient magnetic coupling
• Through-hole PC pin termination for secure board mounting

Applications

• Solid-state power supply designs
• PC board power distribution systems
• Industrial control circuitry requiring isolated power
• Audio equipment power stages

Procurement Notes

Verify the specific datasheet version to confirm terminal pinout and insulation class requirements. Ensure the selected configuration matches the required secondary current and voltage polarity. Check compliance documentation for RoHS status if environmental regulations apply to the final assembly. Confirm mechanical dimensions fit the designated PCB footprint before ordering.

Selection Notes

Choose this component when a 1.5VA isolated power source is needed with flexible secondary output options. The single primary design simplifies wiring for fixed voltage applications. Consider the through-hole mounting style for robust mechanical stability. Evaluate thermal performance based on the total load current drawn from the secondary windings.

Part Context

This model belongs to Triad Magnetics' general-purpose power transformer lineup. It utilizes a bobbin-wound laminated core structure typical for low-voltage AC power conversion. The F-series designation indicates a standard industrial grade component suitable for various electronic assemblies requiring reliable electrical isolation.

Replacement Considerations

Direct substitutes must match the 1.5VA rating, 115V primary, and 12.6VCT secondary specifications. Verify that alternative parts support the same series/parallel secondary configurations and maintain equivalent 1500Vrms isolation. Ensure physical dimensions and pin spacing are compatible with existing PCB layouts.