749252150

Current Sense Transformers Overview

The Würth Elektronik 749252150 is a surface-mount current sense transformer from the WE-CST series. It features a 1:150 turns ratio and an inductance of 1.8 mH. The component supports a primary DC resistance of 3 milliohms and a secondary DC resistance of 21 ohms. It operates at a frequency of 1 MHz with a maximum primary current rating of 7 A.

Current Sense Transformers Feature Summary

• Integrated magnetic core for compact board-level integration
• High isolation voltage capability between primary and secondary windings
• Designed for precise current monitoring in switching power supplies

Current Sense Transformers Applications

• Current sensing in DC-DC converters
• Overcurrent protection circuits
• Power supply feedback loops

Current Sense Transformers Procurement Notes

Verify the complete part number against official Wurth Elektronik documentation to ensure correct specifications. Confirm that the surface-mount package dimensions match the design footprint. Check for any specific handling requirements during assembly.

Current Sense Transformers Selection Notes

Select this component when a high-isolation current transformer is required for low-current primary sides. The 1:150 ratio suits applications where secondary side loading must be minimal. Ensure the 7 A primary limit covers peak operational currents.

Current Sense Transformers Part Context

This device belongs to the WE-CST family of current sense transformers. These components are designed to replace bulky discrete current sensing methods. They provide galvanic isolation while maintaining signal integrity at high frequencies.

Current Sense Transformers Replacement Considerations

Direct substitutes include other WE-CST models with similar ratios, such as 749252030. Verify electrical parameters and pinout compatibility before substitution.