B57127P100M301

Overview

The B57127P100M301 is a PTC inrush current limiter from the EPCOS B57127P series, designed for PCB mounting. It features a nominal resistance of 10 Ohms at 25°C with a tolerance of ±20%. The component has a disk diameter of 30.5mm and supports a maximum steady-state current of 15A. It utilizes radial leads for termination and holds UL certification under standard 1434.

Feature Summary

• Provides effective inrush current limiting to protect downstream electronic circuits during power-up phases.
• Features automatic reset capability, allowing the device to return to high-resistance state after fault conditions clear.
• Constructed as a coated leaded disk suitable for through-hole PCB mounting applications.

Applications

• Switching power supplies
• Industrial control systems
• Consumer electronics

Procurement Notes

Verify the specific part number suffix against official TDK/EPCOS documentation to ensure correct resistance and current ratings. Confirm that the procurement source provides genuine components with valid UL certification marks. Check for RoHS compliance status if required by project specifications. Ensure storage conditions maintain component integrity prior to assembly.

Selection Notes

Select this component when a 10 Ohm nominal resistance and 15A steady-state current rating are required for inrush protection. Consider the 30.5mm diameter for spatial constraints on the PCB layout. Evaluate the thermal characteristics and time-current curves to ensure compatibility with the specific load profile and ambient operating temperatures of the target application circuit.

Part Context

This component belongs to the B57127P series of NTC inrush current limiters manufactured by EPCOS, now part of the TDK Group. These devices are engineered to suppress high initial charging currents in capacitive loads. The series offers various resistance values to suit different power levels while maintaining consistent physical dimensions for standardized design integration across multiple product lines.

Replacement Considerations

• B57127P-KIT