B57211P0809M351

Overview

The B57211P0809M351 is a leaded inrush current limiter (ICL) from the P11 series by TDK. It features a disk design with coated terminals and axial leads. The component has a nominal resistance of 8 Ohms at 25°C with a tolerance of ±20%. It supports a maximum steady-state current of 4A and exhibits a hot resistance of 380 mOhms. The physical dimensions include a diameter of 13mm (0.512 inches) and a lead spacing of 7.50mm (0.295 inches).

Feature Summary

• Leaded and coated disk construction for robust mechanical stability.
• Designed specifically for limiting inrush currents in electronic circuits.
• Features axial leads for through-hole mounting applications.

Applications

• Power supply input stages
• Transformer protection
• Capacitor charging circuits

Procurement Notes

Verify the specific suffix M351 to confirm tape and reel packaging requirements. Ensure the 8 Ohm resistance rating aligns with the target circuit's thermal management needs. Confirm that the 4A steady-state current capacity meets the operational load without exceeding the component's thermal limits during continuous operation.

Selection Notes

Select this component when an 8 Ohm initial resistance is required to limit peak charging currents. The 4A steady-state rating suits moderate power applications. Consider the 13mm diameter for available board space. Verify compatibility with standard through-hole soldering processes given the coated disk structure.

Part Context

This part belongs to the EPCOS P11 series of inrush current limiters. These components utilize negative temperature coefficient (NTC) ceramic materials to provide high initial resistance that drops as current flows. The series is designed for general-purpose circuit protection against surge currents during power-up phases.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Cross-reference with other P11 series variants if different resistance or current ratings are needed, ensuring dimensional compatibility with existing footprints.