B57236S0479M054

Overview

The B57236S0479M054 is a radial leaded NTC thermistor from the S236 series, designed for inrush current limiting. It features a nominal resistance of 4.7 Ω at 25°C with a tolerance of ±20%. The component has a maximum rated power dissipation of 2.1 W and operates within a temperature range of -55°C to +170°C. Its physical dimensions are 16 mm in height, 11.5 mm in length, and 6 mm in depth, with a thermal time constant of 70 seconds.

Feature Summary

• Provides effective suppression of high initial surge currents during power-up cycles
• Ensures stable performance under continuous operation across wide temperature extremes
• Offers precise resistance tolerance for consistent circuit protection reliability

Applications

• Inrush current limiting in power supply inputs
• Protection of electronic circuits against startup surges
• General purpose overcurrent protection in consumer electronics

Procurement Notes

Verify the specific ordering suffix M054 against official TDK documentation to confirm packaging and marking details. Ensure the selected variant matches the required PCB mounting style and lead configuration. Cross-reference the part number with the latest datasheet to validate compliance with relevant safety standards and environmental regulations before finalizing procurement.

Selection Notes

Select this component based on its 4.7 Ω nominal resistance and 2.1 W power rating to match the specific energy absorption requirements of the target application. Consider the 70-second thermal time constant for response speed analysis. Verify that the operating temperature range of -55°C to 170°C covers the environmental conditions of the end product.

Part Context

This device belongs to the B57236S0M0 series of coated disk NTC thermistors manufactured by EPCOS (TDK). These components are engineered for robust inrush current limiting applications. The series utilizes negative temperature coefficient technology to provide high initial resistance that drops significantly as current flows and temperature rises.

Replacement Considerations

Direct substitutes include other B57236S0 series variants with matching resistance values, such as B57236S0479M000. Verify dimensional compatibility and thermal characteristics when considering alternative manufacturers or series.