B57234S0220M051

Overview

The B57234S0220M051 is a leaded NTC thermistor designed for inrush current limiting. It features a resistance of 22 ohms at 25°C with a tolerance of ±20%. The component has a power rating of 1.8 W and withstands AC voltages up to 265 V. Operating temperature ranges from -55°C to +170°C. Physical dimensions include a case diameter of 9.5 mm, width of 6 mm, and lead spacing of 7.50 mm (0.295 inches).

Feature Summary

• Provides effective inrush current limiting in electronic circuits.
• Constructed as a leaded and coated disk for robust mounting.
• Ensures high reliability under demanding thermal conditions.

Applications

• Power supply input stages
• Transformer protection circuits
• Motor drive systems

Procurement Notes

Verify the specific part number against official EPCOS/TDK documentation to confirm electrical ratings and physical dimensions. Ensure compatibility with target voltage and current requirements. Check for RoHS compliance status and UL approval agency markings on the datasheet before finalizing procurement specifications.

Selection Notes

Select this component based on its 22-ohm cold resistance and 1.8-watt power dissipation capability. Consider the 7.50 mm lead spacing for PCB layout constraints. Evaluate the operating temperature range to ensure suitability for the intended environmental conditions and thermal management strategy.

Part Context

This component belongs to the B57234 series of NTC thermistors manufactured by EPCOS, now part of TDK Electronics. These devices are specialized for circuit protection applications, specifically managing startup currents in sensitive electronics. The series is known for consistent performance in industrial and consumer electronics markets.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Generic equivalents may differ in B-value or mechanical tolerances. Verify that any replacement matches the 22-ohm resistance and 9.5 mm diameter specifications exactly.