B57153S0479M000

Overview

The B57153S0479M000 is an NTC thermistor inrush current limiter from the S153 series. It features a nominal resistance of 4.7 Ohms with a tolerance of ±20% at 25°C. The device supports voltage ratings of 115 VAC and 230 VAC, with a maximum rated power of 1.4 W. Key electrical parameters include a B-parameter of 2800 K and a loss factor of 8 mW/K. It has a radial lead spacing of 5 mm and operates within a temperature range of -55°C to +170°C.

Feature Summary

• Provides high electrical stability for effective surge protection during circuit startup
• Reduces power consumption by lowering resistance significantly as temperature rises
• Designed for PCB mounting with radial leads for secure installation

Applications

• Protection against high surge currents in electronic circuits
• Inrush current limiting in power supply inputs
• Surge suppression in AC mains applications

Procurement Notes

Verify the exact part number suffix when ordering, as TDK may update identifiers without changing functionality. Confirm that the required voltage rating aligns with your specific application's AC line requirements. Ensure the thermal environment allows for proper heat dissipation given the 1.4 W power rating. Check for any recent product change notices regarding packaging or material composition updates.

Selection Notes

Select this component based on the required 4.7 Ohm initial resistance and 3 A current rating. Consider the 8.5 mm body diameter for spatial constraints on the PCB layout. Verify compatibility with the target operating temperature range up to 170°C. Ensure the B-parameter of 2800 K matches the thermal characteristics needed for your specific inrush limiting profile.

Part Context

This component belongs to the EPCOS (TDK) B57153S series of NTC thermistors specifically designed for inrush current limiting. These devices are engineered to protect sensitive electronic components from damage caused by high initial charging currents. The series offers various resistance values to suit different power levels and circuit requirements.

Replacement Considerations

Public confirmed substitute part numbers: B57153S0479M054