70004K

Power Transformers Overview

The 70004K is a toroidal power transformer manufactured by Talema Group LLC, designed for through-hole mounting. It features dual 115V primaries configured for parallel or series connection to support 115V and 230V input voltages. The secondary winding provides two distinct output configurations: an 18V winding rated at 88mA in parallel mode, and a 36V winding rated at 44mA in series mode. This component belongs to the low-profile PCB mounting series, offering a compact form factor with a power rating of 1.6VA.

Power Transformers Feature Summary

• Dual primary windings allow flexible connection for 115V or 230V operation
• Low-profile design suitable for space-constrained applications
• Toroidal core construction for efficient magnetic coupling

Power Transformers Applications

• General purpose AC power supply circuits
• Electronic equipment requiring isolated power conversion
• Industrial control systems

Power Transformers Procurement Notes

Verify that the specific application requires the 1.6VA power rating and the exact secondary voltage/current combinations (18V/88mA or 36V/44mA). Confirm that the through-hole mounting style aligns with the target PCB layout. Ensure the input voltage range matches the dual primary configuration capabilities before finalizing procurement.

Power Transformers Selection Notes

Select this model when a compact toroidal transformer is needed for standard line voltages. The choice depends on the required isolation and the specific secondary load requirements fitting within the 1.6VA limit. Consider the physical dimensions and lead spacing if replacing existing components.

Power Transformers Part Context

This component is part of Talema's standard product portfolio, which includes various toroidal transformers and magnetic components. The manufacturer specializes in custom and off-the-shelf designs established since 1975. The 70004K represents a standard low-profile variant within their broader catalog of power supply magnetics.

Power Transformers Replacement Considerations

When substituting this component, ensure the replacement matches the 1.6VA rating, toroidal shape, and through-hole pinout. Verify that the new unit supports the same dual primary voltage options and provides equivalent secondary isolation characteristics.

Power Transformers FAQ

Can the primary windings be connected in series?

Yes, the dual 115V primary windings can be connected in series to accommodate 230V input voltage.

What is the maximum power rating of this transformer?

The maximum power rating is 1.6VA.