ALFT-03A-4

Overview

The ALFT-03A-4 is a common mode filter choke manufactured by Abracon LLC, designed for through-hole PCB mounting. It features a ferrite core and operates within a temperature range of -25°C to +85°C. Key electrical specifications include an inductance of 19 mH at 1 kHz, a maximum DC current rating of 500 mA, and a maximum DC resistance of 1.2 Ohms (1200 mOhms). The component supports a withstand voltage of 2 kVrms and has a minimum insulation resistance of 100 MΩ. Physical dimensions are 23.9 mm in length, 18 mm in width, and 21.6 mm in height.

Feature Summary

• Utilizes a ferrite core material for effective common mode noise suppression in AC line applications.
• Designed for vertical through-hole mounting with a four-pin PC pin configuration.
• Provides high dielectric strength with a 2 kVrms withstand voltage rating.

Applications

• AC line filtering for commercial electronic equipment
• Industrial control systems requiring common mode noise reduction
• Power supply input stages for signal integrity protection

Procurement Notes

Verify the specific part number suffix against official Abracon documentation to ensure correct inductance and current ratings. Confirm that the required operating temperature range and physical footprint match your PCB design constraints. Check for RoHS compliance status if mandated by your project requirements. Ensure the through-hole spacing aligns with your manufacturing capabilities.

Selection Notes

Select this component when a 19 mH inductance is required for common mode noise attenuation at 500 mA. Consider the 2 kVrms isolation capability for safety-critical AC line interfaces. Evaluate the 23.9 x 18 x 21.6 mm package size against available board space. Compare the 1.2 Ohm DCR against power loss tolerances in the target circuit design.

Part Context

The ALFT-03A series comprises common mode chokes intended for AC line filtering. This specific model belongs to the ALFT-03A family, which offers various inductance values tailored for different current and noise suppression needs. These components are classified as Commercial-Off-The-Shelf (COTS) products suitable for general commercial and industrial use.

Replacement Considerations

Cross-reference with other ALFT-03A variants such as ALFT-03A-5 or ALFT-03A-6 if different inductance or current ratings are needed. Verify mechanical compatibility before substituting with non-Abracon equivalents. Ensure any replacement maintains the 2 kVrms withstand voltage and similar thermal characteristics.