B82801B0205A100

Current Sense Transformers Overview

The B82801B0205A100 is a surface-mount current sense transformer from the TDK B82801B series, utilizing an EE5 core. It features a primary DC resistance of 0.6 ohms and a secondary DC resistance of 5.5 ohms. The component has a turns ratio of 1:100 and an inductance of 2 mH. It operates within a frequency range of 50 kHz to 1 MHz and supports a sensed current of 20 A. The package dimensions are 7.11 mm x 8.13 mm with a maximum height of 5.08 mm. It complies with RoHS standards and functions between -40°C and 125°C.

Current Sense Transformers Feature Summary

• Surface mount construction with gull wing termination for automated assembly
• EE5 core design providing high isolation and low magnetic interference
• Low DC resistance characteristics for minimal power loss in sensing circuits

Current Sense Transformers Applications

• Switching power supplies
• Feedback control systems
• Overload sensing circuits
• Load drop detection

Current Sense Transformers Procurement Notes

Verify the specific manufacturer designation, as this component was originally part of the EPCOS portfolio now integrated into TDK Electronics. Confirm that the ordering suffix matches the required electrical parameters, particularly the 1:100 turns ratio and 2 mH inductance. Ensure the procurement channel provides genuine parts with traceable documentation to guarantee compliance with RoHS regulations and operational reliability in sensitive power electronics applications.

Current Sense Transformers Selection Notes

Select this component when a compact surface-mount solution is required for current monitoring in high-frequency environments up to 1 MHz. The 1:100 turns ratio makes it suitable for detecting currents up to 20 A while maintaining signal integrity for feedback loops. Consider the physical footprint constraints and thermal operating range requirements to ensure compatibility with the target printed circuit board layout and environmental conditions.

Current Sense Transformers Part Context

This device belongs to the B82801B series of SMT current sense transformers, which are designed for miniaturized power electronics. The series utilizes EE cores to provide robust performance in space-constrained designs. These components are widely used in modern switching mode power supplies where accurate current sensing is critical for regulation and protection without introducing significant insertion loss.

Current Sense Transformers Replacement Considerations

Direct substitutes within the same series include variants with different inductance values or turns ratios, such as those in the B82801B family. Cross-manufacturer replacements require matching the EE5 core size, 1:100 ratio, and 2 mH inductance. Verify that alternative components support the same 20 A sensed current and operate within the specified 50 kHz to 1 MHz frequency range.