B57234S0220M000

Overview

The B57234S0220M000 is a leaded and coated NTC thermistor from the S234 series, designed for inrush current limiting. It features a disk package with radial leads and through-hole mounting. The component has a nominal resistance of 22 ohms at 25 °C with a tolerance of ±20%. It supports a maximum steady-state current of 4 A and operates within a temperature range of -55 °C to +170 °C.

Feature Summary

• Provides effective inrush current limitation during power-up phases
• Utilizes a leaded and coated disk construction for robust mechanical stability
• Offers automatic reset functionality after thermal cooling

Applications

• Inrush current limiting in switching power supplies
• Protection circuits for AC/DC converters
• Electronic equipment input stages requiring surge suppression

Procurement Notes

Verify the specific ordering code against official TDK documentation to ensure correct tolerance and current ratings. Confirm that the lead spacing matches the target PCB footprint requirements. Ensure compliance with RoHS standards if required by the end-product specifications.

Selection Notes

Select this component based on the required nominal resistance value and maximum steady-state current capacity. Evaluate the thermal environment to ensure the operating temperature remains within the specified limits. Consider the physical dimensions and lead configuration for proper board layout integration.

Part Context

This part belongs to the EPCOS (now TDK) B57234 series of inrush current limiters. These components are widely used in industrial and consumer electronics to protect sensitive downstream circuitry from high initial charging currents.

Replacement Considerations

Direct substitutes include other NTC inrush limiters with matching 22 ohm resistance and 4 A current rating. Verify equivalent thermal characteristics and physical dimensions before substitution.