DRA73-221-R

Fixed Inductors Overview

The DRA73-221-R is a shielded wirewound power inductor from Eaton Electronics, designed for automotive applications. It features a ferrite core and surface-mount construction with dimensions of 7.60mm x 7.60mm x 3.55mm. The component has an inductance of 220 µH with a ±20% tolerance. Key electrical parameters include a DC resistance (DCR) of 1.23 Ohms, a saturation current (Isat) of 510 mA, and an RMS current rating of 479 mA. It operates within a temperature range of -40°C to 165°C and holds AEC-Q200 qualification.

Fixed Inductors Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Shielded drum core design minimizes electromagnetic interference
• High thermal stability supporting extended operating temperatures

Fixed Inductors Applications

• Automotive power supply circuits
• SEPIC converter topologies
• DC-DC converter input/output filtering

Fixed Inductors Procurement Notes

Verify the specific suffix and manufacturer lot code against the latest Eaton datasheet to ensure compliance with AEC-Q200 requirements. Confirm that the received components match the specified 220 µH inductance and 1.23 Ohm DCR values. Check for any recent Product Change Notices (PCN) regarding manufacturing line updates or material substitutions that may affect performance characteristics.

Fixed Inductors Selection Notes

Select this component when space-constrained automotive designs require high power density in a 7.6x7.6mm footprint. Ensure the circuit's peak current does not exceed the 510 mA saturation limit to maintain inductance stability. Consider the 1.23 Ohm DCR for efficiency calculations in low-current applications. Verify compatibility with reflow soldering profiles suitable for components rated up to 165°C.

Fixed Inductors Part Context

This part belongs to the DRA series of shielded drum core inductors from Eaton Electronics. The series is specifically engineered for automotive electronics, offering robust performance under harsh environmental conditions. The DRA73 variant denotes the specific 7.6x7.6mm package size within the broader product family.

Fixed Inductors Replacement Considerations

Direct substitutes must match the 220 µH value, 7.6x7.6mm footprint, and AEC-Q200 qualification. Cross-reference with other Eaton DR series parts like DR127-221-R only if board space allows for larger packages. Verify equivalent Isat and DCR specifications before substitution.