ST-3-24

Power Transformers Overview

The Signal Transformer ST-3-24 is a laminated core power transformer designed for through-hole mounting. It features dual primary windings supporting 115V and 230V inputs at 50/60 Hz. The secondary configuration offers parallel 12V at 200mA or series 24V at 100mA, delivering a maximum power rating of 2.4VA. The unit provides 2500Vrms isolation voltage and measures 34.90mm in length, 28.60mm in width, with a maximum installation height of 30.80mm.

Power Transformers Feature Summary

• Dual primary winding capability for flexible 115V or 230V AC input selection
• Configurable secondary output allowing parallel 12V or series 24V operation
• Laminated core construction with high-voltage isolation protection

Power Transformers Applications

• Power supply units requiring isolated AC-to-AC conversion
• Industrial control systems utilizing standard mains voltages
• Equipment needing configurable 12V or 24V secondary rails

Power Transformers Procurement Notes

Verify the specific datasheet version to confirm compliance with current environmental directives such as RoHS. Ensure the ordering suffix matches the required packaging format, as variations may exist between tape-and-reel and box quantities. Confirm that the physical dimensions align with the target PCB footprint before finalizing procurement orders.

Power Transformers Selection Notes

Select this component when a 2.4VA capacity is sufficient for the load requirements. Choose the ST-3-24 over the DST-3-24 if only a single 115V primary input is needed, as the DST variant supports both 115V and 230V primaries. Ensure the application environment accommodates the through-hole mounting style and the specified thermal characteristics of the laminated core design.

Power Transformers Part Context

This transformer belongs to the Split/Tran Class B-3 series from Signal Transformer. The series utilizes split bobbin technology to enhance safety isolation between windings. The ST-3-24 represents the 115V primary variant within this family, distinct from models like the DST-3-24 which support dual primary voltages.

Power Transformers Replacement Considerations

Signal Transformer ST-3-24 is a direct substitute for Tamura 3FS-324. Triad Magnetics F24-100 is listed as a similar alternative. Verify pinout compatibility and mechanical fit when switching between these manufacturers.