4201-003LF

Overview

The 4201-003LF is a third-order low-pass LC (Pi) EMI feedthrough filter manufactured by Tusonix. It features a capacitance of 2000 pF and a rated voltage of 100 V, with a maximum DC current handling capacity of 15 A. The component utilizes an axial bushing package design for chassis mounting. Its physical dimensions are characterized by a diameter of 0.187 inches (4.75 mm). The unit operates reliably within a temperature range of -55°C to +125°C and provides significant attenuation, achieving 65 dB suppression at 100 MHz.

Feature Summary

• Third-order LC Pi-filter topology for enhanced high-frequency noise suppression
• Axial bushing construction enabling direct panel or chassis mounting
• High current handling capability suitable for power line filtering applications

Applications

• Data lines for mobile devices
• Chassis-mounted EMI/RFI filtering systems
• Power supply input stages requiring high current isolation

Procurement Notes

Verify the specific suffix 'LF' confirms RoHS 3 compliance when sourcing replacements. Confirm that the axial bushing package matches the mechanical constraints of the target chassis aperture. Ensure the 15 A current rating aligns with the operational load requirements of the circuit to prevent thermal degradation during continuous use.

Selection Notes

Select this component when a third-order attenuation profile is required for strict EMI compliance in mobile or industrial environments. The axial bushing form factor simplifies installation on metal enclosures compared to surface-mount alternatives. Consider the 100 V rating and 15 A current limit to ensure adequate headroom for the specific application's electrical stress conditions.

Part Context

This component belongs to the 4200 series of EMI feedthrough filters from Tusonix. These filters are engineered for robust electromagnetic interference mitigation in harsh environments. The series offers various capacitance and current ratings to suit different power and data line protection needs across aerospace, military, and commercial electronics sectors.

Replacement Considerations

Direct substitutes include other third-order LC Pi-filters with similar axial bushing packages. Verify that any replacement maintains the 2000 pF capacitance, 15 A current rating, and 100 V voltage specification to ensure equivalent performance characteristics.