B57234S0479M000

Overview

The B57234S0479M000 is a leaded NTC thermistor designed for inrush current limiting applications. It features a resistance of 4.7 Ohms at 25°C with a tolerance of ±20%. The component supports a maximum steady-state current of 6.6 A and operates at voltages up to 110 VAC or 230 VAC. It has a case diameter of 15.00 mm (0.591 inches) and a lead spacing of 7.50 mm (0.295 inches). The device is rated for an operating temperature range from -55°C to +170°C and holds UL approval.

Feature Summary

• Designed specifically for inrush current limiting in electronic circuits
• Provides reliable protection against high initial current surges
• Capable of handling significant steady-state currents up to 6.6 A

Applications

• Power supply input stages
• Consumer electronics power inputs
• Industrial equipment power management

Procurement Notes

Verify the specific ordering code matches the required resistance and current ratings. Confirm that the lead spacing and case dimensions fit the target PCB layout. Ensure the application voltage does not exceed the 230 VAC rating. Check for UL certification requirements if applicable to the end product. Validate thermal management needs given the 170°C maximum operating temperature.

Selection Notes

Select this component when inrush current suppression is required for AC mains or DC inputs. Consider the 4.7 Ohm cold resistance value for circuit design calculations. Evaluate the 6.6 A steady-state current capacity against peak load requirements. Ensure the physical size of the 15 mm disk fits within the available space constraints.

Part Context

This part belongs to the EPCOS (now TDK Electronics) NTC thermistor family specialized for circuit protection. These components are widely used in automotive, industrial, and consumer electronics to protect sensitive downstream components from damage caused by high startup currents.

Replacement Considerations

Direct substitutes must match the 4.7 Ohm resistance, 6.6 A current rating, and 15 mm diameter. Verify equivalent lead spacing and voltage ratings. Cross-reference with other TDK E-series inrush limiters for dimensional compatibility.