70033K

Power Transformers Overview

The Talema Group LLC 70033K is a toroidal power transformer with a 7VA rating. It features dual 115V primaries configurable for parallel or series connection to support 115V or 230V input. The secondary provides dual 15V windings, offering 466mA in parallel configuration and 233mA in series configuration for 30V output. Designed for through-hole mounting, this component utilizes low-profile construction to minimize size and weight while maintaining standard electrical isolation and performance characteristics for general power supply applications.

Power Transformers Feature Summary

• Toroidal core design for compact footprint and low profile
• Dual primary windings allowing flexible 115V or 230V operation via parallel or series connection
• Dual secondary windings providing selectable voltage and current outputs
• Through-hole mounting style for PCB integration

Power Transformers Applications

• Low-power AC/DC power supply units
• Electronic equipment requiring isolated low-voltage DC rails
• Consumer electronics with space-constrained designs
• Industrial control systems utilizing standard toroidal transformers

Power Transformers Procurement Notes

Verify the specific datasheet version from Talema Group LLC to confirm pinout orientation and insulation class requirements. Ensure the selected configuration (parallel vs. series) matches the target system's voltage and current needs. Confirm that through-hole mounting pads on the PCB align with the transformer's lead spacing. Check for any regional compliance certifications required for the end application market.

Power Transformers Selection Notes

Select this model when a 7VA capacity is sufficient and low profile dimensions are critical. Choose the parallel secondary configuration for higher current availability at lower voltage, or the series configuration for higher voltage at reduced current. Verify that the dual primary winding setup accommodates the available mains voltage. Consider thermal management requirements based on the expected load duty cycle within the enclosure.

Power Transformers Part Context

This component belongs to the Talema 70000K series of low-profile PCB mounting toroidal transformers, which range from 1.6VA to 50VA. The series is characterized by small size and low weight compared to traditional laminated transformers. Talema Group LLC manufactures these components using toroidal cores to optimize magnetic efficiency and reduce electromagnetic interference, catering to markets requiring compact magnetic solutions.

Power Transformers Replacement Considerations

Direct replacements must match the 7VA rating, 115V/230V primary options, and 15V secondary specifications. Verify physical dimensions and lead spacing to ensure PCB compatibility. Alternative models from the same 70000K series may offer different VA ratings but require circuit redesign if electrical parameters differ significantly.