FN402-0.5-02

Overview

The Schaffner FN402-0.5-02 is a single-phase EMC/EMI power line filter designed for printed circuit board mounting. It features through-hole termination with PC pins and supports rated voltages up to 250VAC. The component handles a continuous current of 500 mA and operates within a frequency range of DC to 400 Hz. Key electrical parameters include an inductance of 40 mH, a leakage current of 210 mA, and compliance with UL, CSA, and IEC/EN standards. It functions as a single-stage filter suitable for general-purpose applications.

Feature Summary

• Provides electromagnetic interference suppression for single-phase AC power lines
• Designed for direct printed circuit board integration via through-hole technology
• Constructed for durability in general-purpose electronic equipment environments

Applications

• General-purpose electrical and electronic equipment
• Single-phase power supply input stages
• EMC/EMI mitigation in consumer electronics

Procurement Notes

Verify the specific manufacturer designation, as TE Connectivity acquired Schaffner. Confirm that the part number corresponds to the standard FN402 series rather than specialized variants like the FN402B medical grade. Ensure the voltage rating matches the application requirements, as some sources cite 250VAC while others may reference different ratings for similar form factors.

Selection Notes

Select this component when a low-current, single-phase PCB-mounted solution is required. The 500 mA rating limits its use to small signal or low-power devices. Verify that the 40 mH inductance provides sufficient attenuation for the target noise spectrum. Consider the physical dimensions and pin spacing to ensure compatibility with the PCB layout constraints.

Part Context

This component belongs to the FN402 series of power line filters manufactured by Schaffner, now part of TE Connectivity. The series offers various current ratings for single-phase applications. The FN402-0.5-02 specifically addresses the lowest current requirement in the standard lineup, providing a compact footprint for space-constrained designs requiring basic EMI filtering capabilities.

Replacement Considerations

The FN402B-0.5-02 serves as a verified alternative within the same family, offering similar electrical characteristics but potentially differing in certification scope or cost structure. Cross-reference datasheets to confirm identical pinout and inductance values before substitution.