7492540070

Current Sense Transformers Overview

The Würth Elektronik 7492540070 is a surface-mount current sense transformer from the WE-CST series. It features a 1:70 turns ratio and supports a primary current rating of 40 A. The component exhibits a primary DC resistance of 0.28 mΩ and a secondary DC resistance of 367 mΩ. It has an inductance of 2.74 mH and operates effectively up to a frequency of 1 MHz. The device utilizes 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 surface-mount assembly with gull-wing termination style.
• Supports high-frequency operation up to 1 MHz for precise signal sensing.

Current Sense Transformers Applications

• Current sensing in AC/DC converters
• Offline switching power supplies
• General industrial power control systems

Current Sense Transformers Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, such as tape-and-reel or cut tape options. Confirm that the selected variant matches the required termination style and reel specifications for automated assembly lines. Cross-reference the manufacturer part number against official distributor catalogs to avoid substitution errors during procurement.

Current Sense Transformers Selection Notes

Select this component when a 40 A current rating and 1:70 transformation ratio are required for isolated current measurement. Ensure the operating temperature range of -40°C to 125°C aligns with the thermal environment of the target application. Verify that the 1 MHz frequency response meets the switching speed requirements of the power converter design.

Current Sense Transformers Part Context

This component belongs to the WE-CST series of current-sense transformers manufactured by Würth Elektronik. These devices are engineered for compact electronic designs requiring reliable isolation and accurate current feedback. The series is commonly integrated into intelligent power systems and control boards where space efficiency and performance are critical.

Current Sense Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Wurth Elektronik resources for direct equivalents within the WE-CST family if alternative sourcing is necessary.