ETA-USA RMS, TMS, & TNS EMI Power Line Filters

Introduction

ETA-USA RMS, TMS, and TNS EMI power line filters are off-the-shelf solutions designed to reduce conducted electromagnetic interference on AC and DC power lines. Available in single-phase and three-phase configurations, these filters help commercial and industrial equipment meet electromagnetic compatibility requirements while maintaining reliable power delivery.

Part Description

The ETA-USA RMS, TMS, and TNS series consists of two-stage EMI power line filters for applications that require effective suppression of electrical noise between 50 kHz and 1 MHz. They are suitable for systems operating from 250 V to 500 V AC or DC and support rated currents up to 400 A.

Key characteristics include:

• Single-phase and three-phase filter options
• Two-stage EMI filtering topology
• High attenuation over the 50 kHz to 1 MHz frequency range
• 250 V or 500 V AC/DC operating capability
• Current ratings up to 400 A
• Low voltage drop for efficient power distribution
• Commercial and industrial suitability
• ICC, cRU, and CE safety certifications

These filters can be used at equipment power inputs to prevent internally generated switching noise from reaching the mains supply and to reduce the impact of external line noise on sensitive electronics.

Applications

Potential applications for ETA-USA EMI power line filters include:

• Data center power distribution equipment
• Industrial automation cabinets
• Manufacturing machinery
• Motor drives and variable-frequency drives
• Power supplies and converter systems
• UPS and backup power systems
• HVAC and building automation equipment
• Telecommunications infrastructure
• Test and measurement equipment
• Renewable-energy power conversion systems
• Commercial electrical panels
• High-current electronic equipment

Industries

Possible industries include:

• Data center and cloud infrastructure
• Industrial manufacturing
• Factory automation
• Energy and utilities
• Telecommunications
• Commercial building systems
• Transportation infrastructure
• Renewable energy
• Medical equipment manufacturing
• Aerospace and defense support equipment
• Semiconductor manufacturing
• Test and measurement

Usage Ideas

1. EMI-Filtered Data Center Rack Power Input
   Install a suitable three-phase filter at the incoming power connection of a high-density server rack or power distribution unit to reduce conducted noise and improve EMC performance.

2. Industrial Motor Control Cabinet
   Add an RMS, TMS, or TNS filter ahead of a variable-frequency drive or motor controller to limit switching noise returning to the facility power line.

3. Low-Noise Manufacturing Test Station
   Integrate a single-phase or three-phase filter into the power entry section of an automated test fixture to help protect sensitive measurement electronics from line disturbances.

Conclusion

ETA-USA RMS, TMS, and TNS EMI power line filters provide a practical filtering option for commercial and industrial power systems. With two-stage attenuation, AC/DC voltage support up to 500 V, current ratings up to 400 A, and recognized safety certifications, they are well suited for reducing conducted EMI in data centers, manufacturing equipment, automation systems, and other demanding electrical installations.