B57236S0509M000

Overview

The B57236S0509M000 is a negative temperature coefficient (NTC) thermistor from the EPCOS S236 series, designed for inrush current limiting. It features a nominal resistance of 5 Ω at 25°C with a ±20% tolerance and a maximum rated power of 2.1 W. The component has a thermal time constant of 70 seconds and supports steady-state currents up to 4.5 A. Its physical dimensions are 16 mm in height, 11.5 mm in length, and 6 mm in depth. Operating temperatures range from -55°C to 170°C, with a maximum rated AC voltage of 265 V.

Feature Summary

• Coated thermistor disk construction for environmental protection
• Kinked leads made of tinned copper wire for secure mounting
• Capable of use in series connections up to 265 VRMS

Applications

• Inrush current limiting in electronic circuits
• Power supply input stages
• Transformer protection

Procurement Notes

Verify that the specific part number matches the required resistance value and tolerance for your design. Confirm that the lead configuration and package dimensions fit the PCB layout. Ensure the application does not exceed the maximum rated power or steady-state current limits specified in the datasheet. Check for compliance with relevant safety standards such as IEC 60539 if required for your region.

Selection Notes

Select this component based on the required nominal resistance and maximum steady-state current. Consider the thermal time constant for response speed requirements. Verify that the operating temperature range covers the expected environmental conditions. Ensure the voltage rating is sufficient for the circuit application. Compare alternative resistances within the same series if different current limiting characteristics are needed.

Part Context

This component belongs to the B57236S0 series of NTC thermistors manufactured by EPCOS, a TDK Group company. The series is characterized by coated disk designs and kinked leads, suitable for through-hole mounting. These components are widely used for protecting sensitive electronics against high initial charging currents.

Replacement Considerations

Substitutes must match the 5 Ω resistance, 2.1 W power rating, and 4.5 A current capacity. Verify dimensional compatibility and lead type. Cross-reference with other manufacturers' inrush current limiters offering similar electrical specifications and certifications.