749251060

Current Sense Transformers Overview

The Würth Elektronik 749251060 is a surface-mount current sense transformer from the WE-CST series. It features a primary-to-secondary turns ratio of 1:60 and supports a maximum primary current of 10A. The component has a DC resistance of 1.75 ohms on the secondary side and an inductance of 720 µH. It operates with an ET value of 30 Vµs and a frequency range up to 1MHz. The package dimensions are 7.70mm x 6.90mm x 5.33mm, utilizing gull-wing termination for PCB mounting.

Current Sense Transformers Feature Summary

• Provides galvanic isolation between primary and secondary circuits for accurate current monitoring
• Designed for high-frequency operation suitable for switching power supply applications
• Compact surface-mount footprint facilitates automated assembly and space-constrained designs

Current Sense Transformers Applications

• Current sensing in AC-DC converters
• Offline flyback converter topologies
• Primary-side current regulation systems

Current Sense Transformers Procurement Notes

Verify the specific manufacturer part number against official Wurth Elektronik documentation to ensure compatibility with design requirements. Confirm that the selected component meets all electrical specifications, including the 1:60 turns ratio and 10A primary current rating. Check for any recent product change notices or environmental compliance updates prior to finalizing procurement orders.

Current Sense Transformers Selection Notes

Select this component when a 1:60 transformation ratio is required for primary-side current sensing. Ensure the PCB layout accommodates the 7.70mm x 6.90mm footprint and 5.33mm height. Verify that the operating frequency does not exceed 1MHz and that the peak primary current remains within the 10A limit to maintain performance integrity.

Current Sense Transformers Part Context

This device belongs to the WE-CST series of current-sense transformers manufactured by Würth Elektronik. These components are engineered for isolated current measurement in power electronics. The series offers various turns ratios and current ratings to suit different converter architectures, providing reliable performance in compact surface-mount packages.

Current Sense Transformers Replacement Considerations

The 749251070 is a documented substitute within the same WE-CST series, offering a 1:70 turns ratio and 980 µH inductance. Designers must verify that the altered ratio and electrical characteristics align with their specific circuit requirements before substitution.