B57127P709M301

Overview

The B57127P709M301 is a leaded and coated NTC thermistor disk from the P27 series, designed for inrush current limiting. It features a nominal resistance of 7 Ohms at 25°C with a tolerance of ±20%. The component has a diameter of 30.5 mm (1.2 inches) and supports a maximum steady-state current of 17 A. Its hot resistance is 45 mOhms, and it operates within a temperature range of 0°C to 65°C.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences
• Features a robust leaded and coated disk construction for PCB mounting
• Offers stable performance across standard operating temperatures

Applications

• Power supply input stages
• Industrial equipment protection
• Consumer electronics circuits

Procurement Notes

Verify the manufacturer designation carefully, as TDK Electronics has discontinued the EPCOS brand name for passive components. Ensure the ordering suffix matches the required resistance and current ratings. Confirm that the specific package dimensions align with your PCB layout requirements before finalizing procurement.

Selection Notes

Select this component based on its 7 Ohm resistance and 17 A steady-state current capacity. Consider the thermal time constant and hot resistance values for circuit design. Ensure the operating temperature range meets the application's environmental demands. Compare against other series members for alternative current handling capabilities.

Part Context

This part belongs to the B57127P0***M301 series of inrush current limiters manufactured by TDK Electronics. These components are widely used for protecting electronic circuits from damaging surge currents. The series offers various resistance and current options to suit different power levels.

Replacement Considerations

Direct substitutes include other parts within the B57127P0***M301 series with matching electrical parameters. Verify compatibility with any legacy EPCOS branded components previously used in the design.