RN142-4-02-3M3

Overview

The Schaffner RN142-4-02-3M3 is a common mode choke from the RN series, designed for PCB mounting via through-hole termination. It features a ferrite core and operates within a temperature range of -40°C to +100°C. Key electrical parameters include an inductance of 3.3 mH with tolerances of -30% to +50%, a maximum DC current rating of 4 A, and a maximum DC resistance of 67 mOhms. The component measures 18 mm x 12.5 mm x 20 mm and is rated for 300 VDC.

Feature Summary

• Provides electromagnetic interference suppression for power lines
• Utilizes a ferrite core for effective noise attenuation
• Designed for vertical or horizontal board mounting configurations

Applications

• Power supply input filtering
• Battery charger circuits
• Portable electronic device power stages

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct pinout and mechanical orientation. Confirm that the voltage rating and current capacity align with the target circuit requirements before finalizing procurement orders.

Selection Notes

Select this component when a 4 A current rating and 3.3 mH inductance are required for common mode noise reduction. Ensure the PCB layout accommodates the specified physical dimensions and through-hole spacing for reliable assembly.

Part Context

This part belongs to the Schaffner RN series of EMC chokes, which are engineered for general-purpose noise suppression in electronic equipment. The series offers various current and inductance combinations to suit different power line filtering needs.

Replacement Considerations

Cross-reference with other RN series variants such as RN142-2-02-3M3 for lower current applications. Verify compatibility with alternative manufacturers' common mode chokes having identical inductance and current ratings.