B57211P0250M301

Overview

The B57211P0250M301 is a leaded inrush current limiter (ICL) manufactured by EPCOS, now part of TDK Electronics. This component features a disc shape with a diameter of 13 mm (0.512 inches). It provides a nominal resistance of 25 Ohms at 25°C with a tolerance of ±20%. The device supports a maximum steady-state current of 2.5 A and exhibits a resistance of 487 mOhms under operating current conditions. It includes a lead spacing of 7.50 mm and holds safety certifications including CQC, UL, and VDE.

Feature Summary

• Leaded thermistor design for inrush current limitation
• High accuracy resistance tolerance of ±20%
• Certified for industrial and consumer applications

Applications

• Power supply input stages
• Consumer electronics protection
• Industrial equipment circuits

Procurement Notes

Verify the specific suffix M301 against official TDK documentation to confirm lead configuration and packaging details. Ensure the requested quantity matches standard reel or bulk availability. Confirm that the 2.5 A steady-state rating aligns with the target circuit requirements before finalizing the order.

Selection Notes

Select this component when a 25 Ohm initial resistance is required to limit surge currents in low-power circuits. The 2.5 A steady-state capability suits applications where continuous current remains below this threshold. Consider the 13 mm form factor for board space constraints and verify thermal dissipation needs for the specific mounting environment.

Part Context

This part belongs to the B57211 series of inrush current limiters from EPCOS/TDK. These components are designed to protect electronic circuits from high initial charging currents. The series offers various resistance values and current ratings to accommodate different power supply designs and load requirements across multiple industries.

Replacement Considerations

Consult official TDK cross-reference lists for direct substitutes. Verify that any alternative maintains the 25 Ohm resistance, 2.5 A current rating, and 13 mm diameter dimensions to ensure mechanical and electrical compatibility.