749251020

Current Sense Transformers Overview

The Würth Elektronik 749251020 is a surface-mount current-sense transformer from the WE-CST series. It features a 1:20 turns ratio and supports a primary current of 10 A. The component has an inductance of 80 µH and an ET constant of 10 Vµs. Primary DC resistance is 0.75 mΩ, while secondary DC resistance is 0.2 Ω. Dimensions are 7.70 mm x 6.90 mm with a maximum height of 5.33 mm.

Current Sense Transformers Feature Summary

• Integrated magnetic core for compact current sensing
• Surface-mount鸥翼 (gull-wing) termination style
• RoHS compliant construction

Current Sense Transformers Applications

• Primary-side current monitoring in power supplies
• Overcurrent protection circuits
• Switching mode power supply (SMPS) designs

Current Sense Transformers Procurement Notes

Verify the specific datasheet version to confirm electrical tolerances and mechanical dimensions. Ensure compatibility with peak current requirements and thermal management strategies during integration. Cross-reference manufacturer documentation for any recent product change notifications or material updates.

Current Sense Transformers Selection Notes

Select this component when a low-profile, high-current solution is required for primary-side sensing. The 1:20 ratio suits applications needing moderate signal amplification. Evaluate footprint constraints against the 7.70 mm length and 5.33 mm height limits before finalizing the PCB layout.

Current Sense Transformers Part Context

This part belongs to the WE-CST series of current-sense transformers by Würth Elektronik. These components are designed for board-mount applications where space efficiency and reliable magnetic performance are critical. The series offers various ratios to match different circuit impedance and sensitivity needs.

Current Sense Transformers Replacement Considerations

No public confirmed substitute part numbers are available in the provided data.