RN112-2-02-1M8

Overview

The Schaffner RN112-2-02-1M8 is a current compensated common mode choke designed for printed circuit board mounting. It features a ferrite core and through-hole termination with an unshielded construction. The component provides an inductance of 1.8 mH at a test frequency of 10 kHz, with a tolerance range of -30% to +50%. It supports a maximum DC current of 2 A and exhibits a maximum DC resistance of 74 mOhms. The physical dimensions are 18 mm x 12.5 mm x 20 mm, operating within a temperature range of -40°C to +100°C.

Feature Summary

• Current compensated design for effective common mode noise suppression
• Vertical PCB mount configuration for space-constrained applications
• Ferrite core construction ensuring stable performance across wide temperature ranges

Applications

• Power supply input filtering
• DC-DC converter noise attenuation
• General EMI suppression in electronic equipment

Procurement Notes

Verify the specific part number against official TE Connectivity or Schaffner documentation to confirm pinout orientation and mechanical footprint compatibility. Ensure that the 1.8 mH inductance value and 2 A current rating align with the target circuit requirements. Cross-reference the manufacturer's datasheet for any recent revisions to the RN series specifications before finalizing procurement decisions.

Selection Notes

Select this component when vertical mounting is required for common mode chokes in power circuits. The 1.8 mH inductance offers a balance between noise attenuation and size. Consider the 74 mOhm DC resistance for efficiency calculations. Verify that the 2 A current rating exceeds the peak load current of the application to prevent saturation.

Part Context

This component belongs to the RN series of common mode chokes manufactured by Schaffner EMC Inc., now part of TE Connectivity. The series is characterized by current compensated designs suitable for various EMC/EMI filtering needs. The RN112 variant specifically denotes a horizontal or vertical choke configuration depending on the suffix, with the 1M8 indicating the 1.8 mH inductance value.

Replacement Considerations

Check for direct substitutes within the RN series with matching inductance and current ratings. Verify mechanical compatibility if replacing with other manufacturers' components. Ensure equivalent thermal performance and impedance characteristics.