3-143-903

Overview

The Schurter 3-143-903 is a two-line current compensated choke belonging to the DKUH-1 series. It features an inductance of 7 mH and supports a maximum DC current of 100 A with a DCR of 0.35 mΩ. Rated for 250 V AC and 800 V DC, this component utilizes through-hole terminals for panel or board mounting. Designed for high-current applications, it operates effectively at a test frequency of 400 Hz.

Feature Summary

• Provides electromagnetic interference suppression through current compensation technology
• Engineered for high direct current handling capabilities up to 100 A
• Constructed with through-hole termination style for robust electrical connections

Applications

• Two-phase power supply input filtering
• High-current DC link chokes
• Industrial power conversion systems

Procurement Notes

Verify the specific voltage rating requirements against the 250 V AC and 800 V DC specifications before integration. Confirm that the physical dimensions and terminal spacing match the target PCB or chassis layout. Ensure the operating environment remains within the thermal limits defined by the manufacturer's datasheet to maintain performance integrity.

Selection Notes

Select this component when high current capacity and low resistance are critical for efficiency. The compensated design reduces overall size compared to standard chokes carrying similar currents. Evaluate the 7 mH inductance value against the required ripple current attenuation needs of the specific circuit topology.

Part Context

This part belongs to the DKUH-1 series of current compensated chokes from Schurter. These components are designed to replace traditional common mode chokes in high-current applications, offering significant volume reduction while maintaining effective noise suppression characteristics for demanding industrial and commercial power electronics environments.

Replacement Considerations

No public confirmed substitute part numbers are available.