B57213P0309M301

Overview

The B57213P0309M301 is a leaded inrush current limiter (ICL) from the EPCOS P13 series, manufactured by TDK Electronics. It features a nominal resistance of 3 Ohms at 25°C with a tolerance of ±20%. The component supports a maximum steady-state current of 7 A and has a disk diameter of 14.5 mm (0.571 inches). It achieves a minimum hot resistance of 0.074 Ohms at maximum current. The device utilizes a standard 7.50 mm lead spacing for through-hole mounting.

Feature Summary

• Provides effective suppression of high inrush currents during power-up to protect downstream electronic components.
• Features automatic reset functionality, eliminating the need for manual replacement after thermal cycling.
• Constructed as a coated ceramic disk designed for robust performance in industrial and consumer applications.

Applications

• Power supply input stages
• Consumer electronics equipment
• Industrial control systems

Procurement Notes

Verify that the specific ordering suffix matches the required resistance and current ratings for the target circuit design. Confirm that the physical dimensions and lead spacing are compatible with the printed circuit board layout. Ensure compliance with relevant safety certifications such as UL or VDE if required for the final product application.

Selection Notes

Select this component based on the calculated peak inrush current and the operating voltage requirements of the system. Ensure the steady-state current rating exceeds the normal operational load to prevent unnecessary heating. Consider the thermal environment and mounting orientation to maintain reliable long-term operation within specified temperature limits.

Part Context

This part belongs to the EPCOS P13 series of inrush current limiters, which are widely used for protecting sensitive circuits against transient overcurrents. As a TDK Electronics product, it adheres to strict quality standards for passive components used in automotive, industrial, and consumer markets.

Replacement Considerations

Compatible substitutes include other P13 series variants with similar electrical characteristics, such as the B57213P0259M301 or B57213P0160M351, provided their resistance and current ratings align with the specific application requirements.