ECST1V0805-1040-R

Overview

The ECST1V0805-1040-R is a surface-mount current sense transformer from Eaton Electronics, designed for board-level integration. It features a turns ratio of 40:1 and supports primary currents up to 10 A. The device operates within a frequency range of 50 kHz to 1 MHz, with a maximum inductance of 320 µH. Electrical characteristics include a primary resistance of 0.7 mΩ and a secondary resistance of 1.14 Ω. It is qualified under AEC-Q200 standards, ensuring reliability for automotive applications across an operating temperature range of -40°C to +125°C.

Feature Summary

• AEC-Q200 qualified for automotive reliability
• Surface mount design for automated assembly
• High-frequency operation up to 1 MHz

Applications

• Automotive power electronics monitoring
• Current sensing in DC-DC converters
• Battery management systems

Procurement Notes

Verify the specific suffix and revision level against the manufacturer's latest datasheet to ensure compatibility with target designs. Confirm that the AEC-Q200 qualification meets the specific automotive grade requirements of the end application. Check for any recent supply chain updates or alternative packaging options if reel quantities differ from standard cut-tape availability.

Selection Notes

Select this component when a high-isolation current transformer is required for frequencies above 50 kHz. The 40:1 ratio suits applications needing significant signal attenuation for downstream ADCs. Ensure the PCB footprint matches the 8.38 mm x 8 mm dimensions. Consider thermal dissipation limits given the low primary resistance and 10 A rating.

Part Context

This part belongs to the ECST series of current sense transformers, optimized for SMT processes. It complements other Eaton components like the ECSTA series by offering specific ratio and inductance combinations tailored for compact automotive and industrial power stages.

Replacement Considerations

Direct substitutes may include other 40:1 ratio current transformers from Eaton or competitors with matching 0805-like footprints. Verify inductance values near 320 µH and secondary resistance around 1.14 Ω to maintain circuit accuracy.