B57211P0250M351

Overview

The B57211P0250M351 is a leaded inrush current limiter (ICL) from the P11 series by TDK. It features a nominal resistance of 25 Ohms with a tolerance of ±20% at 25°C. The component supports a maximum steady-state current of 2.5 A and has a power rating of 3 W. Physical dimensions include a diameter of 13.00 mm (0.512 inches) and a lead spacing of 7.50 mm (0.295 inches). The dissipation factor is 13 mW/K, and it exhibits a cold resistance of approximately 487 mOhms at maximum current.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences to protect downstream components.
• Features self-resetting functionality that returns to high resistance state after cooling down following a transient event.
• Constructed with nickel barrier termination for reliable soldering and long-term stability in various environments.

Applications

• Power supply input stages requiring surge protection
• Consumer electronic devices with AC/DC conversion
• Industrial control systems with sensitive circuitry

Procurement Notes

Verify the specific ordering suffix M351 to confirm lead length and packaging configuration. Ensure compatibility with RoHS3 standards if required by your assembly process. Cross-reference the manufacturer part number against distributor listings to confirm availability and authenticity. Check datasheet revisions for any marking or design changes that may affect mechanical fit.

Selection Notes

Select this component based on the required 25 Ohm nominal resistance and 2.5 A steady-state current capability. Consider the physical diameter of 13 mm for board space constraints. Evaluate the thermal management requirements given the 3 W power rating and dissipation factor. Ensure the lead spacing matches the PCB footprint design for proper installation.

Part Context

This component belongs to the B57211 series of inrush current limiters manufactured by EPCOS, now part of TDK Electronics. These devices are designed for general-purpose circuit protection against surge currents. The P11 series designation indicates specific performance characteristics within the broader product line.

Replacement Considerations

Check for direct substitutes within the B57211 family with similar resistance and current ratings. Verify mechanical dimensions and lead spacing compatibility before substituting. Consult official cross-reference lists for approved alternatives.

FAQ

What is the nominal resistance value of the B57211P0250M351?

The nominal resistance is 25 Ohms with a tolerance of ±20% at 25°C.

What is the maximum steady-state current rating?

The maximum steady-state current is 2.5 A.