B57236S0509M054

Overview

The B57236S0509M054 is a negative temperature coefficient (NTC) thermistor from the TDK B57236S0 series, designed for inrush current limiting applications. It features a nominal resistance of 5 Ohms at 25°C with a tolerance of ±20%. The component has a maximum rated power of 2100 mW and withstands a steady-state current of 4.5 A. It operates within a temperature range of -55°C to +170°C and exhibits a thermal time constant of 70 seconds. The device utilizes a radial leaded package with coated disk construction.

Feature Summary

• Provides effective suppression of high inrush currents during power-up phases
• Features rapid self-heating response due to low thermal inertia
• Maintains stable electrical performance across wide industrial temperature ranges

Applications

• Inrush current limiting in AC/DC power supplies
• Protection circuits for switching mode power supplies
• Surge current protection in consumer electronic devices

Procurement Notes

Verify the specific suffix M054 against official TDK documentation to confirm packaging type and compliance status. Ensure the selected variant matches the required steady-state current rating of 4.5 A for the target circuit design. Cross-reference the part number with the latest datasheet to confirm availability and manufacturing status.

Selection Notes

Select this component based on the 5 Ohm resistance requirement and 4.5 A current handling capability. Consider the 70-second thermal time constant for circuit timing analysis. Verify that the radial leaded package fits the PCB layout constraints and that the operating temperature range meets environmental specifications.

Part Context

This part belongs to the EPCOS (TDK) B57236S0 series of NTC thermistors specifically engineered for inrush current limitation. The series offers various resistance values and current ratings to suit different power supply designs. These components are widely used in general electronics to protect downstream components from initial surge currents.

Replacement Considerations

Consult official TDK substitution guides for equivalent parts within the B57236S0 family or other compatible NTC thermistor series. Verify that any substitute matches the 5 Ohm resistance, 4.5 A current rating, and physical dimensions.