B57237S0220M051

Inrush Current Limiters (ICL) Overview

The B57237S0220M051 is a leaded NTC thermistor designed for inrush current limiting. It features a nominal resistance of 22 Ohms at 25°C with a tolerance of ±20%. The component supports a steady-state current rating of 2.8 A and operates within voltage ratings of 110 VAC or 230 VAC. It utilizes a coated disk case measuring 15 mm in diameter and 6 mm in width, with a lead spacing of 5 mm. The device functions effectively across an operating temperature range from -55°C to +170°C.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up phases
• Utilizes negative temperature coefficient characteristics to reduce resistance as temperature rises
• Features a robust coated disk construction suitable for various mounting requirements

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Consumer electronic devices
• Industrial control equipment

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific series designation S237 and the M51 packaging suffix against official TDK Electronics documentation to ensure compatibility with automated assembly processes. Confirm that the thermal environment of the application remains within the specified -55°C to +170°C operating range to maintain performance integrity and prevent premature degradation of the thermistor material.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required 22 Ohm initial resistance and 2.8 A continuous current capacity. Ensure the physical dimensions of the 15 mm disk fit the available PCB space. Evaluate the energy absorption capabilities relative to the specific circuit's surge profile to guarantee reliable long-term operation without thermal failure.

Inrush Current Limiters (ICL) Part Context

This part belongs to the EPCOS B57237S series of inrush current limiters manufactured by TDK Electronics. These components are engineered to protect sensitive electronic circuits from damage caused by high initial charging currents. The series offers various resistance values and current ratings to accommodate diverse power supply designs and industrial applications.

Inrush Current Limiters (ICL) Replacement Considerations

Consult official TDK Electronics substitution guides for compatible alternatives within the B57237S family. Verify that any substitute maintains identical electrical parameters, including 22 Ohm resistance and 2.8 A rating, while ensuring mechanical compatibility with existing board layouts.