B57213P0121M301

Overview

The B57213P0121M301 is a leaded inrush current limiter manufactured by EPCOS, now part of TDK Electronics. This component features a nominal steady-state resistance of 120 Ohms with a tolerance of ±20%. It is rated for a maximum continuous current of 2 Amperes and utilizes a disc package measuring 14.50mm in diameter. Designed for robust performance, it effectively limits high initial surge currents to protect downstream electronic circuits from damage during power-up sequences.

Feature Summary

• Provides effective suppression of high inrush currents during device startup
• Features low steady-state resistance to minimize operational power loss
• Constructed with a robust ceramic composition for thermal stability

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct tolerance and packaging specifications. Confirm that the component meets all required safety certifications for the target application region. Cross-reference the datasheet parameters with system design requirements to guarantee compatibility with voltage and current ratings.

Selection Notes

Select this component based on the required steady-state resistance value and the maximum continuous current rating of the circuit. Ensure the physical dimensions fit the available board space and that the thermal characteristics align with the operating environment. Evaluate the surge current handling capability to match the peak inrush levels expected during operation.

Part Context

This component belongs to the B57213 series of inrush current limiters produced by EPCOS, which has been integrated into TDK Electronics. The series is designed for general-purpose overcurrent protection in various electronic applications. These devices are widely used to extend the lifespan of sensitive components by mitigating stress during power transitions.

Replacement Considerations

Consult official substitution lists for compatible equivalents within the same product family. Verify that any alternative part matches the electrical characteristics and physical footprint to ensure seamless integration without redesigning the circuit layout.