4203-003LF

Overview

The 4203-003LF is an LC (Pi) EMI feedthrough filter manufactured by Tusonix, a subsidiary of CTS Electronic Components. This component functions as a third-order low-pass filter designed for chassis mounting applications. It features a capacitance value of 1500 pF and supports a continuous current rating of 10 A. The device is rated for operation at voltages up to 350 VDC at temperatures reaching 85°C. It utilizes an axial bushing configuration with one turret lead, providing robust electromagnetic interference suppression in high-power environments.

Feature Summary

• Provides third-order low-pass filtering characteristics for effective noise attenuation
• Features a chassis-mountable axial bushing design with a single turret lead
• Capable of handling high continuous current loads up to 10 amperes

Applications

• Chassis-mounted power line filtering in industrial equipment
• Electromagnetic interference suppression in high-voltage DC systems
• Signal conditioning in aerospace and defense electronic assemblies

Procurement Notes

Verify the specific voltage derating requirements against your operational temperature profile, as the 350V rating is specified at 85°C. Confirm that the mechanical dimensions of the axial bushing fit your panel cutout specifications. Ensure the 10A current capacity aligns with your circuit's maximum load to prevent thermal degradation. Check for RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when a third-order LC filter topology is required for superior high-frequency attenuation compared to standard capacitive filters. The choice is driven by the need for high current handling capability combined with a compact chassis-mount form factor. Consider the 1500pF capacitance value relative to your cutoff frequency requirements and ensure the 350VDC rating exceeds your system's peak operating voltage under all conditions.

Part Context

This part belongs to the Tusonix family of EMI feedthrough filters, which are specialized components designed for harsh electrical environments. These filters integrate passive components into a single hermetically sealed or robust housing to minimize parasitic effects. The 4203 series specifically targets applications requiring reliable noise suppression on power lines where space constraints favor direct panel mounting over PCB-based solutions.

Replacement Considerations

Direct substitutes must match the 1500pF capacitance, 10A current rating, and 350VDC voltage rating. Verify that any alternative maintains the same axial bushing mechanical interface and turret lead configuration to ensure compatibility with existing panel cutouts and wiring harnesses.