RN122-3-02-4M5

Overview

The Schaffner RN122-3-02-4M5 is a current compensated common mode choke designed for PCB mounting. It features a ferrite core and through-hole termination. The component supports a maximum operating voltage of 300 VDC and a nominal current rating of 3 A. Its inductance is specified at 4.5 mH with a tolerance range of -30% to +50%. The maximum DC resistance is limited to 630 mOhms. It operates within a temperature range of -40°C to +100°C. The physical dimensions are 27 mm x 28 mm x 16.5 mm, and it is unshielded.

Feature Summary

• Provides common mode noise suppression for sensitive electronic circuits
• Utilizes a ferrite core for effective electromagnetic interference filtering
• Designed for direct printed circuit board integration via through-hole terminals

Applications

• Medical equipment such as CAT scanners and defibrillators
• X-ray imaging systems
• Laboratory diagnostic equipment

Procurement Notes

Verify the specific suffix '4M5' against official TE Connectivity or Schaffner documentation to confirm the exact inductance value and tolerance specifications. Ensure the procurement source provides valid RoHS compliance data. Confirm that the package dimensions and pin configuration match the target PCB layout requirements before finalizing orders.

Selection Notes

Select this component when designing medical or laboratory devices requiring compact EMI filtering. The 3 A current rating and 300 VDC voltage limit define its operational boundaries. Consider the horizontal mounting style and unshielded nature during PCB layout planning to ensure adequate clearance and thermal management within the enclosure.

Part Context

This part belongs to the RN series of EMC/RFI chokes manufactured by TE Connectivity / Schaffner. These components are specifically engineered for applications where space constraints and high performance are critical. The RN series is widely recognized in the medical electronics sector for providing reliable noise attenuation in diagnostic and therapeutic equipment.

Replacement Considerations

Publicly confirmed substitute part numbers for RN122-3-02-4M5 were not identified in available documentation. Verify compatibility with alternative Schaffner RN series variants only if electrical parameters and mechanical footprints are explicitly matched in manufacturer cross-reference lists.