B57211P0259M301

Overview

The B57211P0259M301 is an SMD NTC thermistor from the EPCOS (TDK) B57211 series, designed for temperature measurement and compensation. It features a nominal resistance of 2.5 Ohms with a tolerance of ±20% at 25°C. The component utilizes a multilayer construction with nickel barrier termination (Ag/Ni/Sn) to ensure superior resistance stability during soldering processes. It is housed in a compact 0402 surface-mount package, offering high accuracy and excellent long-term ageing stability suitable for demanding electronic environments.

Feature Summary

• Multilayer SMD NTC structure with inner electrodes
• Nickel barrier termination for enhanced soldering stability
• High accuracy with tight resistance and B value tolerances
• Excellent long-term ageing stability in high-temperature conditions

Applications

• Mobile phone applications including battery packs
• Temperature compensation for TCXO and LCD modules
• Data systems requiring precise thermal monitoring
• Automotive electronics temperature sensing

Procurement Notes

Verify the specific suffix M301 against official TDK documentation to confirm packaging format and reel specifications. Ensure compatibility with standard reflow soldering profiles given the nickel barrier termination. Cross-reference the exact resistance tolerance and B-value limits required by your design against the manufacturer's datasheet to guarantee performance within the intended operating range.

Selection Notes

Select this component when a compact 0402 footprint is required for precise temperature monitoring in mobile or automotive devices. The nickel barrier termination makes it suitable for applications requiring robust solder joint integrity. Consider the low nominal resistance value for circuits where minimal self-heating is critical. Verify that the operating temperature range aligns with the device's environmental requirements.

Part Context

This part belongs to the B57211 series of SMD NTC thermistors manufactured by EPCOS, now integrated into TDK Electronics. The series is characterized by its small form factor and reliability in consumer and automotive electronics. These components are engineered to provide stable thermal feedback in space-constrained designs, supporting the growing demand for miniaturized yet accurate temperature sensing solutions.

Replacement Considerations

Check for direct substitutes within the B57211 family with matching resistance values. Verify if alternative manufacturers offer equivalent 0402 NTCs with compatible nickel barrier terminations. Ensure any replacement maintains the same B-value tolerance and thermal time constant characteristics to preserve circuit performance.