B57237S0229M051

Inrush Current Limiters (ICL) Overview

The B57237S0229M051 is an NTC thermistor for inrush current limiting manufactured by EPCOS (TDK). It features a nominal resistance of 2.2 Ohms with a tolerance of ±20% and a steady-state current rating of 7 A. The component supports voltage ratings of 115 VAC and 230 VAC, with a power rating of 3.1 W. Physical dimensions include a 15 mm diameter and 7 mm width. It operates within a temperature range of -55°C to +170°C.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective limitation of high inrush currents during power-up sequences
• Utilizes negative temperature coefficient characteristics for self-regulating thermal response
• Designed for radial PCB mounting with coated disk construction

Inrush Current Limiters (ICL) Applications

• Switching power supply input stages
• Industrial control equipment protection
• Consumer electronics power management

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix against official TDK documentation to confirm lead spacing and packaging details. Ensure application voltage and current requirements align with the 7 A steady-state rating. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement specifications.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required 2.2 Ohm initial resistance and 7 A current handling capacity. Consider the 15 mm form factor for board space constraints. Evaluate the thermal environment to ensure operation remains within the specified -55°C to +170°C range for reliable long-term performance.

Inrush Current Limiters (ICL) Part Context

This part belongs to the S237 series of NTC thermistors designed specifically for inrush current limiting applications. The series offers various resistance and current combinations to suit different power supply designs. TDK manufactures these components using standardized ceramic processes for consistent electrical characteristics.

Inrush Current Limiters (ICL) Replacement Considerations

Consult official TDK substitution guides for compatible alternatives. Verify that any substitute matches the 2.2 Ohm resistance, 7 A rating, and 15 mm diameter dimensions to maintain circuit integrity and mechanical fit.