B57236S0500M000

Overview

The B57236S0500M000 is a negative temperature coefficient (NTC) inrush current limiter manufactured by EPCOS, now TDK Electronics. It features a nominal resistance of 50 Ohms at 25°C with a tolerance of ±20%. The component has a maximum rated power dissipation of 2.1W and supports a peak current of 1.9A to 2A. It operates within a temperature range of -55°C to 170°C. The physical dimensions include a diameter of 11.5mm, a height of 16mm, and a depth of 6mm. It utilizes radial leads for through-hole mounting.

Feature Summary

• Functions as an NTC thermistor to limit high inrush currents during power-up
• Provides automatic resistance adjustment based on operating temperature
• Designed for robust protection in electronic circuits against surge damage

Applications

• Inrush current limiting in power supply units
• Protection for AC mains input stages
• Surge current suppression in industrial electronics

Procurement Notes

Verify the specific manufacturer designation, as the component may be listed under either EPCOS or TDK Electronics due to corporate restructuring. Confirm that the part number suffix matches the required resistance value and tolerance. Ensure the procurement documentation references the correct datasheet version to validate electrical parameters such as peak current and thermal time constants before integration.

Selection Notes

Select this component when a 50 Ohm nominal resistance is required for inrush current control. Verify that the 1.9A peak current rating meets the circuit's startup surge requirements. Ensure the PCB layout accommodates the radial lead spacing and the 11.5mm disk diameter. Check that the operating environment stays within the specified -55°C to 170°C range for reliable performance.

Part Context

This component belongs to the B57236S0 series of coated disk NTC thermistors. These parts are widely used for their reliability in protecting sensitive electronic components from high initial currents. The series is characterized by its standardized dimensions and consistent thermal performance across various industrial and consumer applications.

Replacement Considerations

Compatible substitutes must match the 50 Ohm resistance, 20% tolerance, and radial package style. Verify that alternative parts support similar peak current ratings and operate within the same temperature range. Cross-reference with other manufacturers' NTC inrush limiters ensuring identical form factor and electrical specifications.