B82801A1333A020

Current Sense Transformers Overview

The B82801A1333A020 is a surface-mount current sense transformer manufactured by EPCOS, now part of TDK Electronics. It features a 1:20 turns ratio and operates within a frequency range of 50 kHz to 1 MHz. The component has a DC resistance of 2.5 mOhm on the primary side and 320 mOhm on the secondary side. Its physical dimensions are 3.50 mm in length and 4.70 mm in width. The device is designed for intrusive current sensing applications.

Current Sense Transformers Feature Summary

• Provides precise current measurement through a fixed 1:20 transformation ratio
• Optimized for high-frequency operation between 50 kHz and 1 MHz
• Designed for surface-mount assembly with compact footprint

Current Sense Transformers Applications

• Current sensing in switch-mode power supplies
• Overcurrent protection circuits in industrial electronics
• Feedback loops in DC/DC converters

Current Sense Transformers Procurement Notes

Verify the manufacturer designation as EPCOS or TDK Electronics, as the brand transition occurred. Confirm the specific suffix A020 matches the required 1:20 ratio and mounting style. Ensure the frequency range specification aligns with the target circuit's switching speed. Request original datasheets to validate the DC resistance values of 2.5 mOhm and 320 mOhm. Check for RoHS compliance status if required by the end product regulations.

Current Sense Transformers Selection Notes

Select this component when a compact, surface-mount solution for high-frequency current monitoring is required. The 1:20 ratio suits applications needing moderate signal amplification from the primary line. Verify that the 50 kHz to 1 MHz operational bandwidth covers the system's switching frequencies. Consider the small 3.50 mm x 4.70 mm package size for space-constrained PCB layouts. Evaluate the intrusive nature of the design against available non-intrusive alternatives.

Current Sense Transformers Part Context

This transformer belongs to the B82801A series of current sense transformers from EPCOS/TDK. These components are engineered for reliable performance in demanding electronic environments. The series supports various ratios and mounting options to accommodate different power management architectures. EPCOS, acquired by TDK, maintains a strong presence in automotive and industrial electronic components.

Current Sense Transformers Replacement Considerations

Publicly confirmed substitute part numbers for this specific model are not available in the provided documentation. Cross-referencing requires matching the 1:20 ratio, 50 kHz-1 MHz frequency range, and SMD package dimensions. Consult official TDK catalogs for direct equivalents.