B57235S0259M000

Overview

The B57235S0259M000 is an NTC thermistor from the S235 series designed for inrush current limiting. It features a resistance of 2.5 Ω at 25°C with ±20% tolerance and a steady-state current rating of 5.2 A. The component has a disk body diameter of 9.5 mm and thickness of 6 mm, utilizing radial leads for PCB mounting. It operates within a temperature range of -55°C to +170°C.

Feature Summary

• Provides effective suppression of high initial charging currents in electronic circuits
• Utilizes negative temperature coefficient characteristics to reduce resistance as it heats up
• Features robust leaded and coated disk construction for reliable performance

Applications

• Inrush current limiting in power supply inputs
• Protection of capacitive loads during startup
• Surge current suppression in AC/DC converters

Procurement Notes

Verify the specific resistance value and tolerance against project requirements before integration. Confirm that the thermal time constant and steady-state current rating align with the circuit's operational profile. Ensure the mounting configuration matches the PCB layout constraints. Cross-reference the manufacturer datasheet for detailed derating curves and mechanical dimensions to guarantee compatibility.

Selection Notes

Select this component based on its 2.5 Ω resistance and 5.2 A current handling capability. Consider the physical dimensions of 9.5 mm diameter and 6 mm thickness for spatial constraints. Evaluate the operating temperature range of -55°C to +170°C against environmental conditions. Compare with other S235 series variants if different resistance or current ratings are required.

Part Context

This part belongs to the EPCOS (TDK) S235 series of NTC thermistors specifically engineered for inrush current limiting applications. These components are widely used in consumer electronics and industrial equipment to protect sensitive downstream components from damage caused by high initial surge currents when power is applied.

Replacement Considerations

Compatible substitutes include other S235 series parts such as B57235S0109M000 or B57235S0479M000, depending on required resistance values. Verify that any replacement maintains equivalent current ratings, thermal characteristics, and mechanical dimensions.