RN218-0.9-02-27M

Overview

The RN218-0.9-02-27M is a common mode filter choke from the Schaffner RN series, designed for vertical through-hole PCB mounting. It features a ferrite core and operates within a temperature range of -40°C to +100°C. Key electrical parameters include an inductance of 27 mH with tolerances of -30% and +50%, measured at a test frequency of 10 kHz. The component supports a maximum DC current of 900 mA and has a maximum DC resistance of 620 mOhms. Its physical dimensions are 15.2 mm x 17.9 mm x 19.8 mm, utilizing 0.8 mm lead wires.

Feature Summary

• Vertical through-hole construction for direct PCB integration
• Ferrite core material for effective electromagnetic interference suppression
• Unshielded design suitable for standard circuit board layouts

Applications

• Power supply input filtering
• Battery charger circuits
• Portable electronic device power stages
• Energy-efficient system noise reduction

Procurement Notes

Verify the manufacturer part number RN218-0.9-02-27M against official TE Connectivity or Schaffner documentation to ensure authenticity. Confirm that the received components match the specified 27 mH inductance and 900 mA current rating. Check for physical integrity of the vertical pins and ferrite housing. Ensure compliance with RoHS directives as indicated in the product specifications before final acceptance.

Selection Notes

Select this component when a 27 mH common mode choke is required for low-current applications up to 900 mA. The vertical through-hole format is ideal for boards requiring specific pin spacing or mechanical stability. Consider the 620 mOhm DC resistance for efficiency calculations in sensitive power paths. The wide operating temperature range supports use in varied environmental conditions without derating concerns.

Part Context

This component belongs to the Schaffner RN series of common mode chokes, which are engineered for general-purpose electromagnetic compatibility (EMC) filtering. The series offers various inductance and current ratings to suit different power levels. The RN218 variant specifically targets mid-range current applications, providing a balance between size and filtering performance for consumer and industrial electronics.

Replacement Considerations

The part number alias 817636-SF may be used interchangeably if verified by the manufacturer. When substituting, ensure the replacement maintains the same 27 mH inductance, 900 mA current rating, and vertical through-hole footprint to preserve circuit functionality and mechanical fit.