B57211P0120M301

Overview

The B57211P0120M301 is a leaded negative temperature coefficient (NTC) thermistor designed for inrush current limiting applications. It features a nominal resistance of 12 Ohms with a tolerance of ±20%. The component supports a maximum continuous current of 4 Amperes and has a bead diameter of 13 millimeters. It utilizes a lead spacing of 7.50mm, ensuring compatibility with standard through-hole mounting configurations.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences
• Utilizes NTC material to automatically adjust resistance based on temperature changes
• Designed for robust protection of sensitive electronic circuits against surge damage

Applications

• Inrush current limiting in consumer electronics power supplies
• Surge protection for industrial equipment input stages
• Protection circuits in automotive electronic control units

Procurement Notes

Verify the specific thermal characteristics and steady-state resistance requirements against the official datasheet before finalizing procurement. Ensure that the selected component meets the necessary safety certifications for the intended end-use environment. Confirm lead dimensions and mounting orientation align with the target printed circuit board layout specifications.

Selection Notes

Select this component based on the required nominal resistance value and maximum continuous current rating for the specific application. Evaluate the energy absorption capability to ensure it can handle the expected surge profiles without degradation. Consider the physical size constraints and lead spacing requirements for proper integration into the assembly process.

Part Context

This part belongs to the EPCOS B57211 series of inrush current limiters. These components are manufactured by TDK Electronics following the acquisition of EPCOS. The series provides reliable protection solutions for various electronic systems requiring surge management.

Replacement Considerations

B57211P0120M301