B57236S0809M000

Overview

The B57236S0809M000 is a negative temperature coefficient (NTC) thermistor from the EPCOS B57236S0 series, designed for inrush current limiting. It features an 8 Ω resistance at 25°C with ±20% tolerance and a maximum steady-state current rating of 5.5 A. The component utilizes a radial leaded disk package measuring 11.5 mm in diameter and 6 mm in depth. It operates within a temperature range of -55°C to 170°C and has a thermal time constant of 70 seconds. The unit supports a maximum rated power dissipation of 2.1 W and includes tin-plated copper leads for through-hole mounting.

Feature Summary

• Provides high-performance inrush current limitation with low steady-state resistance to protect sensitive electronics
• Features a coated disk construction suitable for robust through-hole installation
• Designed to extend capacitor lifespan by managing initial charging currents

Applications

• Inrush current limiting in AC/DC power supplies
• Protection of sensitive electronic components during startup
• Capacitor charging circuit protection

Procurement Notes

Verify the specific part number against official TDK/EPCOS documentation to ensure correct resistance and tolerance specifications. Confirm that the application environment remains within the -55°C to 170°C operating range. Check for required certifications such as UL or VDE if applicable to the end product. Ensure mechanical dimensions fit the target PCB layout.

Selection Notes

Select this component when an 8 Ω initial resistance and 5.5 A steady-state current capacity are required. Consider the 70-second thermal time constant for response speed requirements. Evaluate the 2.1 W power rating against expected energy absorption during inrush events. Ensure the radial leaded form factor aligns with the assembly process.

Part Context

This device belongs to the B57236S0 series of NTC thermistors manufactured by EPCOS, a TDK Group company. These components are specifically engineered as inrush current limiters (ICL). The series offers various resistance values to suit different power levels while maintaining consistent physical dimensions and performance characteristics for standardized design integration.

Replacement Considerations

Direct substitutes include other B57236S0 series variants with matching electrical parameters. Verify equivalent steady-state current ratings and thermal time constants. Cross-reference manufacturer datasheets for dimensional compatibility and certification approvals before substitution.