RT8122-20-3M0

Overview

The Schaffner RT8122-20-3M0 is a current compensated common mode choke designed for horizontal PCB mounting. It features an inductance of 3 mH with a tolerance of -30% to +50%, rated for a maximum DC current of 20 A and a typical DC resistance of 7 mOhms. The component operates within a temperature range of -40°C to +100°C, utilizes ferrite core material, and is unshielded. It supports voltage ratings from 250VAC to 3000VAC depending on the specific application context within the series.

Feature Summary

• Horizontal two-wire through-hole PCB mounting configuration
• Current compensated design using ferrite core material
• Unshielded construction for standard EMI suppression

Applications

• Medical device power supply filtering
• Industrial equipment EMI suppression
• General purpose AC line filtering

Procurement Notes

Verify the exact datasheet version for the specific manufacturing batch, as electrical characteristics such as DC resistance may vary slightly between production runs. Confirm that the horizontal mounting orientation matches the target PCB layout constraints. Ensure the operating environment remains within the specified -40°C to +100°C thermal limits to maintain performance integrity.

Selection Notes

Select this component when a horizontal footprint is required for space-constrained PCB designs. The 20 A rating suits high-current applications where significant common mode noise reduction is necessary. Compare against vertical variants like the RT8522 series if board height restrictions differ or if vertical mounting offers better mechanical stability for the specific assembly process.

Part Context

This part belongs to the RT-Series of common mode chokes manufactured by TE Connectivity / Schaffner. The series provides various current and inductance combinations for EMC/EMI compliance. The RT8122 designation specifically indicates the horizontal mounting style, distinguishing it from the vertically mounted RT8522 counterparts within the same product family.

Replacement Considerations

The part number alias 816960-SF is documented for this component. Verify compatibility with any alternative suppliers offering equivalent 3 mH, 20 A horizontal chokes, ensuring identical pin spacing and thermal ratings are maintained.