3-138-331

Overview

The SCHURTER 3-138-331 is a three-phase AC/DC power line filter module designed for industrial applications. It features a rated current of 25 A and operates at voltages up to 520 VAC with frequencies of 50 Hz or 60 Hz. The unit utilizes a two-stage filtering architecture housed in a metal enclosure, providing robust electromagnetic compatibility (EMC) and electromagnetic interference (EMI) suppression. Key electrical parameters include a maximum leakage current of 9.42 mA. The device supports screw clamp termination methods and is engineered for reliable performance across an operating temperature range from -40°C to +100°C.

Feature Summary

• Two-stage EMC/EMI filtering architecture for effective noise suppression
• Metal housing construction for enhanced durability and thermal management
• Screw clamp terminal connections ensuring secure electrical interfaces
• High operational temperature tolerance suitable for demanding environments

Applications

• Industrial machinery power distribution systems
• Three-phase motor drive protection circuits
• Factory automation control panels requiring EMI mitigation
• Heavy-duty equipment power line conditioning

Procurement Notes

Verify the specific voltage rating and current capacity requirements against the 25A/520VAC specifications before procurement. Confirm that the installation environment accommodates the specified operating temperature range of -40°C to +100°C. Ensure that the mounting infrastructure supports the physical dimensions and weight of the metal housing unit. Check for compliance with local electrical safety standards relevant to your region.

Selection Notes

Select this component when a dedicated three-phase solution is required for high-current applications up to 25A. The two-stage design offers superior attenuation compared to single-stage alternatives. Consider the metal housing for improved heat dissipation in enclosed spaces. Verify that the screw clamp termination method aligns with existing wiring practices and torque specifications within the assembly.

Part Context

This model belongs to Schurter's FMBC EP series of power line filters. These modules are specifically engineered for three-phase AC/DC applications where significant electromagnetic interference needs to be controlled. The series emphasizes robust construction and high current handling capabilities, making it suitable for critical industrial infrastructure where reliability and compliance are paramount.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.