ST-3-28

Power Transformers Overview

The ST-3-28 is a laminated core power transformer manufactured by Signal Transformer, designed for through-hole mounting. It features a single primary winding rated for 115V and a secondary configuration with parallel connections at 14V and series connections at 28V. The unit provides a maximum power capacity of 2.4VA and operates at frequencies of 50Hz or 60Hz. It utilizes PC pin termination for board integration.

Power Transformers Feature Summary

• Laminated core construction for efficient magnetic coupling
• Through-hole mounting with PC pin termination
• Dual voltage secondary output options via parallel and series wiring

Power Transformers Applications

• General purpose AC to DC power supply circuits
• Industrial control panel power distribution
• Electronic equipment requiring isolated low-voltage AC sources

Power Transformers Procurement Notes

Verify the specific datasheet version for the exact terminal pinout and mechanical footprint dimensions prior to PCB layout finalization. Confirm that the 2.4VA rating aligns with the load requirements of the target circuit to prevent thermal overload during continuous operation.

Power Transformers Selection Notes

Select this component when a compact, board-mounted solution is required for low-power isolation applications. Ensure the available space accommodates the through-hole pins and that the operating frequency matches the system's 50/60Hz input standard.

Power Transformers Part Context

This part belongs to the ST series of power transformers from Signal Transformer, which are characterized by their small form factor and laminated core design. The series is intended for applications where space constraints limit the use of larger chassis-mounted alternatives.

Power Transformers Replacement Considerations

Cross-reference with other models in the ST series for similar VA ratings if different secondary voltage configurations are needed. Verify mechanical compatibility before substituting with generic equivalents.