B57236S0121M000

Overview

The B57236S0121M000 is a leaded and coated NTC thermistor disk from the EPCOS B57236S series, designed for inrush current limiting. It features a nominal resistance of 120 Ω at 25 °C with a tolerance of ±20%. The component supports a maximum continuous current of 1.5 A and operates within a temperature range of -55 °C to 170 °C. It utilizes a radial through-hole mounting style with a body diameter of 11.5 mm.

Feature Summary

• Provides effective suppression of inrush currents during power-up cycles
• Features a robust leaded and coated disk construction for durability
• Designed for reliable thermal cycling in demanding electronic environments

Applications

• Inrush current limiting in AC/DC power supplies
• Protection circuits for industrial control systems
• Surge protection in consumer electronics equipment

Procurement Notes

Verify that the specific part number matches the required resistance value and current rating for the target application. Confirm compliance with RoHS standards and ensure the operating temperature range aligns with the system's environmental requirements. Cross-reference datasheet parameters against circuit design specifications before integration.

Selection Notes

Select this component based on its 120 Ω nominal resistance and 1.5 A current handling capability. Ensure the physical dimensions fit the PCB layout constraints. Consider the thermal characteristics and B-value stability for accurate temperature compensation or limiting performance in the specific circuit topology.

Part Context

This component belongs to the B57236S series of NTC thermistors manufactured by EPCOS (TDK). These devices are specialized for protecting sensitive electronic components from high initial charging currents. The series offers various resistance values tailored for different voltage and current levels in power conversion applications.

Replacement Considerations

Compatible substitutes include other NTC inrush limiters with similar 120 Ω resistance and 1.5 A ratings. Verify mechanical compatibility and electrical characteristics such as B-value and steady-state resistance when evaluating alternative sources.