B57237S259M54

Inrush Current Limiters (ICL) Overview

The B57237S259M54 is an NTC thermistor designed for inrush current limiting, manufactured by EPCOS (TDK). It features a nominal resistance of 2.5 Ohms with a tolerance of ±20%. The component supports a rated current of 6.5 A and operates within voltage ratings of 110 VAC and 230 VAC. Physical dimensions include a diameter of 15 mm and a width of 7 mm, with leads spaced at 7.5 mm. It functions reliably between -55°C and +170°C, offering stable protection against electrical surges in power circuits.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences to protect downstream components.
• Utilizes negative temperature coefficient characteristics to automatically reduce resistance as the device heats up during operation.
• Constructed with radial leads for secure through-hole mounting on printed circuit boards.

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Switching mode power supplies
• Consumer electronic devices

Inrush Current Limiters (ICL) Procurement Notes

Verify that the specific part number matches the required resistance and current ratings for your circuit design. Confirm compliance with RoHS standards if environmental regulations apply to your manufacturing process. Ensure the thermal management capabilities align with the expected operating temperatures of the final assembly to maintain long-term reliability.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the peak inrush current requirements of the target application. The 2.5 Ohm resistance value must be sufficient to limit initial surge currents without causing excessive voltage drop during steady-state operation. Consider the physical size constraints of the PCB layout when choosing between different diameter variants within the S237 series.

Inrush Current Limiters (ICL) Part Context

This component belongs to the B57237S series of inrush current limiters from EPCOS (TDK). These parts are specifically engineered for protecting sensitive electronics from transient overcurrents. The series offers various resistance values to suit different power levels, ensuring robust performance across diverse industrial and consumer applications.

Inrush Current Limiters (ICL) Replacement Considerations

• B57237S259M53

Inrush Current Limiters (ICL) FAQ

What is the nominal resistance of the B57237S259M54?

The nominal resistance is 2.5 Ohms with a tolerance of ±20%.

What is the maximum rated current for this thermistor?

The component has a rated current capacity of 6.5 A.