ST3-20B13

Power Transformers Overview

The ST3-20B13 is a low-frequency, open-style laminated power transformer from Pulse Electronics' Split Bobbin Plug-In series. It features a horizontal plug-in design with six terminal pins for through-hole mounting. The unit provides a maximum power rating of 2.4VA and supports an insulation voltage of 2500Vrms. The primary winding is configured for 115V input. Secondary outputs offer dual windings with parallel current capacity of 240mA or series configurations delivering 10V at 240mA and 20V at 120mA.

Power Transformers Feature Summary

• Open-style laminated core construction designed for horizontal plug-in applications
• Split bobbin architecture providing enhanced electrical isolation between windings
• Dual secondary winding configuration supporting flexible parallel or series circuit integration

Power Transformers Applications

• Low frequency signal transformation in electronic circuits
• Power supply units requiring split bobbin isolation
• Equipment utilizing horizontal plug-in transformer form factors

Power Transformers Procurement Notes

Verify the specific datasheet version against the manufacturer's official documentation to confirm pinout compatibility and thermal ratings. Ensure that the 2.4VA power rating aligns with the target application's load requirements. Confirm that the 2500Vrms insulation voltage meets safety standards for the intended operating environment. Cross-reference the 115V primary specification with available line voltages to prevent operational mismatch.

Power Transformers Selection Notes

Select this component when a split bobbin topology is required for improved isolation in low-frequency applications. The horizontal plug-in format suits chassis-mounted designs where space constraints favor through-hole assembly over surface mount alternatives. Consider the dual secondary options if variable voltage distribution or current sharing capabilities are necessary within the system architecture.

Power Transformers Part Context

This transformer belongs to the Split Bobbin Plug-In series by Pulse Electronics, which specializes in open-style laminated cores. The series is characterized by its robust construction and suitability for general-purpose power transformation tasks. It serves as a standard solution for applications demanding reliable electrical separation between primary and secondary circuits without encapsulation.

Power Transformers Replacement Considerations

Direct substitutes include other models within the same Split Bobbin series offering identical 2.4VA ratings and 115V primary specifications. Verify mechanical dimensions and pin spacing to ensure physical compatibility with existing PCB layouts or chassis mounts before implementing any alternative part numbers.