B57236S0250M051

Overview

The B57236S0250M051 is a radial leaded NTC thermistor from the S236 series, designed for inrush current limiting. It features a nominal resistance of 25 Ohms 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. Physical dimensions include an 11.5 mm diameter and 6 mm depth. It utilizes tin-plated copper leads with a 5 mm spacing.

Feature Summary

• Provides effective inrush current limitation to protect sensitive electronic components during power-up.
• Features a robust disk package construction suitable for through-hole mounting on PCBs.
• Offers reliable thermal performance across a wide operating temperature range.

Applications

• Inrush current limiting in AC/DC power supplies
• Protection circuits for consumer electronics
• Industrial control system power inputs

Procurement Notes

Verify that the specific part number matches the required 25 Ohm resistance value and ±20% tolerance. Confirm the radial lead configuration and 11.5 mm disk diameter are compatible with the target PCB layout. Ensure the supplier provides documentation confirming compliance with RoHS3 standards and relevant safety certifications such as UL recognition for the intended application environment.

Selection Notes

Select this component when a 25 Ohm initial resistance is required to limit peak charging currents effectively. Consider the 2.1 W power rating and thermal time constant relative to the circuit's duty cycle. Ensure the operating voltage ratings align with the system's AC or DC input levels. Verify that the physical size fits within the available board space constraints.

Part Context

This component belongs to the EPCOS (TDK) S236 series of NTC thermistors specifically engineered for inrush current suppression. The series offers various resistance values tailored to different load requirements while maintaining consistent physical dimensions and mounting characteristics for standardized design integration.

Replacement Considerations

Compatible substitutes within the same series include B57236S0100M051 (10 Ohms), B57236S0309M051 (3 Ohms), and B57236S0479M051 (4.7 Ohms). Selection depends on matching the specific resistance value required for the circuit's inrush current profile.