B82801A1824A100

Current Sense Transformers Overview

The B82801A1824A100 is a surface-mount current sense transformer from the EPCOS (TDK) B82801A series, utilizing an EE4.2 core. It operates within a frequency range of 50 kHz to 1 MHz. The component supports a maximum sensed input current of 7 A. Key electrical parameters include a minimum inductance of 100 µH measured at 100 kHz and 100 mV, and a high-potential insulation test rating of 500 Vrms for 2 seconds between primary and secondary windings. The device features a compact SMT package with a maximum height of 3.5 mm and is rated for a maximum operating temperature of +125 °C.

Current Sense Transformers Feature Summary

• Surface-mount construction for automated assembly
• High insulation voltage capability between windings
• Wide operational frequency range up to 1 MHz
• Compact form factor suitable for dense PCB layouts

Current Sense Transformers Applications

• Current sensing in switch-mode power supplies
• Overcurrent protection circuits
• Feedback control loops in DC-DC converters
• Isolated current monitoring in industrial power systems

Current Sense Transformers Procurement Notes

Verify the specific suffix '100' against official TDK documentation to confirm exact winding ratio and tolerance specifications. Ensure that the selected variant matches the required inductance and saturation current characteristics for the target application. Cross-reference the datasheet revision date to confirm compliance with current safety standards and RoHS directives before finalizing procurement orders.

Current Sense Transformers Selection Notes

Select this component based on the required isolation voltage and frequency range compatibility with the switching converter topology. Evaluate the physical dimensions to ensure fit within the designated PCB footprint, considering the 3.5 mm height constraint. Confirm that the 7 A maximum sensed current aligns with the peak load requirements of the circuit design without causing core saturation or excessive signal distortion.

Current Sense Transformers Part Context

This part belongs to the B82801A family of SMT current sense transformers manufactured by EPCOS, now integrated into TDK Electronics. These components are designed for precise current measurement in isolated power conversion applications. The series offers various inductance values and winding ratios to suit different power levels and control loop requirements, providing a reliable solution for modern electronic power management systems.

Current Sense Transformers Replacement Considerations

Direct substitutes may include other B82801A variants with matching EE4.2 core geometry and similar electrical parameters. Verify equivalent inductance, insulation ratings, and thermal performance when considering alternative part numbers from the same manufacturer or competing suppliers offering comparable surface-mount current transformers.