RN122-4-02-1M8

Overview

The Schaffner RN122-4-02-1M8 is a current-compensated common mode choke from the RN series, designed for through-hole PCB mounting. It features a ferrite core and horizontal orientation with four pins. Key electrical parameters include an inductance of 1.8 mH at a test frequency of 10 kHz, a maximum DC current rating of 4 A, and a maximum DC resistance of 42 mOhms. The component operates within a temperature range of -40°C to +100°C and has physical dimensions of approximately 27 mm x 28 mm x 16.5 mm.

Feature Summary

• Provides effective common mode noise suppression in electronic circuits
• Utilizes a ferrite core for high magnetic permeability and stability
• Designed for direct through-hole integration onto printed circuit boards

Applications

• Electromagnetic interference filtering in power supply inputs
• Noise reduction in data communication lines
• EMI suppression in industrial control equipment

Procurement Notes

Verify the specific manufacturer part number against official TE Connectivity or Schaffner documentation to ensure authenticity. Confirm that the component meets required RoHS compliance standards for your region. Check datasheets for exact mechanical tolerances and thermal characteristics relevant to your assembly process.

Selection Notes

Select this component when a 1.8 mH inductance and 4 A current handling capability are required for common mode noise attenuation. Ensure the PCB layout accommodates the horizontal footprint and pin spacing. Consider the operating temperature range and DC resistance limits relative to the circuit's power dissipation requirements.

Part Context

This component belongs to the Schaffner RN series of current-compensated chokes, widely used for EMI/RFI suppression. The RN122 variant specifically denotes a horizontal configuration with four leads, suitable for robust PCB mounting in environments requiring reliable noise filtration without excessive size constraints.

Replacement Considerations

Consult official substitution guides for equivalent parts with matching inductance, current ratings, and form factors. Verify compatibility with existing board layouts and regulatory certifications before replacing.