B57236S0800M051

Overview

The B57236S0800M051 is a radial leaded NTC thermistor designed for inrush current limiting. It features an 80 Ω resistance at 25°C with ±20% tolerance and a B value of 3435 K. The component supports a steady-state current of 1.6 A and handles peak currents up to 40 A. Rated power dissipation is 0.8 W, with a thermal time constant of 15 s. Operating temperature ranges from -55°C to +170°C. Dimensions are 11.5 mm diameter by 6.0 mm thickness.

Feature Summary

• Provides effective suppression of high inrush currents during power-up phases
• Utilizes negative temperature coefficient characteristics for automatic resistance adjustment
• Features robust disk construction suitable for through-hole mounting applications

Applications

• Power supply input stages
• Transformer protection circuits
• Capacitor charging control

Procurement Notes

Verify the specific suffix M051 against the manufacturer datasheet to confirm lead plating and packaging specifications. Ensure the selected variant matches the required voltage ratings and mechanical dimensions for the target PCB layout. Cross-reference the part number with official TDK documentation to avoid confusion with similar series components that may have different electrical characteristics or physical footprints.

Selection Notes

Select this component based on the required steady-state current handling capability of 1.6 A and the initial resistance value of 80 Ω. Consider the thermal time constant of 15 s for response speed requirements. Evaluate the maximum peak current rating of 40 A against potential surge conditions. Confirm compatibility with operating temperatures ranging from -55°C to +170°C for the intended environment.

Part Context

This part belongs to the B57236S series of NTC thermistors manufactured by EPCOS (TDK). These components are specifically engineered for inrush current limiting in electronic equipment. The series offers various resistance values and current ratings to suit different power levels. They are widely used in consumer electronics and industrial power supplies.

Replacement Considerations

Compatible substitutes include B57236S0800M000 and B57236S0800M052. Verify that alternative parts match the 80 Ω resistance, 1.6 A current rating, and 11.5 mm disk dimensions. Ensure the replacement maintains the same B value and thermal characteristics for equivalent performance.