3EF-42 by Kollmorgen

The Kollmorgen 3EF-42 from the Mains EMI Filters series by Kollmorgen delivers robust suppression of electromagnetic interference for industrial power systems. This mains EMI filter provides a Rated DC Current capacity of 5A max and features an advanced monolithic discoidal capacitor design to stabilize filter performance under varying load conditions. Housed in a sturdy Case Material of cold rolled steel, it ensures mechanical durability and rigidity in harsh environments. The hermetically sealed enclosure, realized through glass hermetic & epoxy sealing, secures internal components against moisture, dust, and corrosive agents. These core capabilities make the 3EF-42 an ideal choice for industrial automation applications requiring consistent EMI mitigation and high reliability.

In terms of technical specifications, the 3EF-42 offers exceptionally low DC Resistance of 0.01? max and a maximum Dissipation Factor of 3% max, ensuring minimal insertion loss and heat generation. It meets stringent dielectric withstand requirements with DWV (Class B, S) at 2.5x rated DC voltage and DWV (R-level) at 2x rated DC voltage. Insulation performance is guaranteed by Insulation Resistance (25 degrees C) of 100,000 M? min. and Insulation Resistance (125 degrees C) of 10,000 M? min. The filter is equipped with Alloy 52 steel lead material for robust electrical connectivity and includes a 60/40 solder preform to facilitate secure PCB mounting. EMI Filtering is fully available, providing consistent attenuation of both differential and common-mode noise.

Operationally, the filter excels across a wide thermal range, with an Operating Temperature spanning -55 degrees C to +125 degrees C and a Maximum Installation Temperature rating of 300 degrees C. Its cold-rolled steel body combined with hermetic sealing ensures stable electrical performance even under significant temperature cycling and vibration. The R-level and Class B/S dielectric ratings offer enhanced voltage endurance during transient events, minimizing the risk of breakdown. Low dissipation factor and high insulation resistance contribute to long-term reliability and low maintenance requirements in continuous-duty industrial environments.

System integration of the Kollmorgen 3EF-42 is straightforward, with standard form factor and solder preform facilitating automated PCB assembly. As part of the Mains EMI Filters series, it seamlessly complements Kollmorgen motor drives, controllers, and power supplies in industrial automation, robotics, and factory power distribution panels. This EMI filter is particularly suited for applications in process control, packaging machinery, and high-voltage DC bus protection, where reliable noise suppression and component longevity are critical to overall system performance and uptime.