B57236S0500M051

Overview

The B57236S0500M051 is a negative temperature coefficient (NTC) thermistor designed for inrush current limiting applications. It features a nominal resistance of 50 Ω at 25 °C with a tolerance of ±20%. The device has a maximum power rating of 2.1 W and a thermal index (B value) of 3165 K. It supports a continuous operating temperature range from -55 °C to +170 °C. The component utilizes a radial leaded disk package with a diameter of 11.5 mm and a height of 6 mm, suitable for through-hole mounting.

Feature Summary

• Provides effective suppression of high inrush currents during power-up phases in electronic circuits.
• Features a robust NTC ceramic core that automatically increases resistance as temperature rises to limit steady-state current.
• Designed for reliable operation within extended industrial temperature ranges up to 170 °C.

Applications

• Switch-mode power supply input stages
• Consumer electronics power inputs
• Industrial control system protection

Procurement Notes

Verify the specific suffix M051 against official TDK documentation to confirm the tape and reel packaging configuration. Ensure the voltage ratings align with the target circuit requirements before procurement. Cross-reference the manufacturer part number to distinguish between bulk and reel variants.

Selection Notes

Select this component based on the required 50 Ω cold resistance and 1.9 A current handling capability. Evaluate the thermal time constant and dissipation factor to ensure adequate protection speed. Confirm that the physical dimensions fit the available PCB footprint and clearance constraints.

Part Context

This part belongs to the B57236S series of NTC inrush current limiters manufactured by EPCOS, now part of TDK Electronics. The series offers various resistance values and package sizes to accommodate different power levels. These components are widely used for protecting downstream capacitors and rectifiers from initial surge currents.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify compatibility with alternative NTC thermistors by matching resistance, current rating, and physical dimensions.