B57238S0309M000

Inrush Current Limiters (ICL) Overview

The B57238S0309M000 is a leaded NTC thermistor designed for inrush current limiting. It features a zero-power resistance of 3 Ohms with a tolerance of ±20% at 25°C. The component utilizes a 16.00mm (0.630-inch) disc package with a maximum steady-state current rating of 7.4A. Lead dimensions include a diameter of 1.00mm ±0.05mm and a spacing of 7.50mm ±0.80mm. This device belongs to the B57238S0 series, providing reliable protection against high initial currents in electronic circuits.

Inrush Current Limiters (ICL) Feature Summary

• Leaded NTC thermistor construction for robust circuit integration
• Designed specifically for limiting high inrush currents during power-up
• Coated disk format ensuring environmental stability and mechanical durability

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary side protection
• Capacitor charging circuit limitation

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific datasheet version for the B57238S0309M000 to confirm thermal characteristics and pulse load ratings. Ensure that the 7.4A steady-state current limit aligns with the target application's operational requirements. Cross-reference lead spacing and disc dimensions with PCB layout constraints before finalizing procurement decisions.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 3 Ohm resistance value is required to effectively suppress inrush currents without excessive power loss during normal operation. The 16mm disc size offers a balance between energy absorption capacity and physical footprint. Consider the 7.4A current rating to ensure the device can handle the peak surge currents typical in the intended power supply or transformer applications.

Inrush Current Limiters (ICL) Part Context

This part belongs to the EPCOS B57238S0 series of NTC thermistors. These components are engineered for inrush current limiting in various electronic systems. The series provides standardized dimensions and electrical characteristics, facilitating consistent design implementation across different product lines from TDK Electronics.

Inrush Current Limiters (ICL) Replacement Considerations

Consult official TDK documentation for direct substitutes within the B57238S0 series. Verify that alternative parts match the 3 Ohm resistance, 16mm disc size, and 7.4A current rating to maintain circuit performance and safety compliance.