B57211P0509M301

Overview

The B57211P0509M301 is a leaded and coated NTC inrush current limiter (ICL) from the P11 series by EPCOS (TDK). It features a disc diameter of 13 mm with a lead spacing of 7.50 mm. At 25°C, the resistance is 5 Ohms with a tolerance of ±20%. The maximum steady-state current rating is 5 A. The component operates within a temperature range of -40 to 170°C and supports soldering methods as specified in mounting instructions.

Feature Summary

• Leaded and coated disk construction for robust circuit protection
• Nickel barrier termination compatible with standard surface and through-hole processes
• High accuracy resistance tolerance for precise inrush current control
• Superior resistance stability during soldering with minimal change

Applications

• Inrush current limiting in power supply inputs
• Protection of electronic circuits against switching surges
• Temperature compensation in mobile phone battery packs
• Automotive electronics applications requiring overcurrent protection

Procurement Notes

Verify the specific ordering suffix to confirm resistance value and tolerance, as the P11 series offers multiple variants. Ensure compatibility with the required steady-state current and voltage ratings for the target application. Confirm that the leaded package format aligns with the PCB layout and assembly process specifications.

Selection Notes

Select this component based on the required 5 Ohm resistance at 25°C and the 5 A steady-state current capability. Consider the 13 mm diameter for spatial constraints and thermal dissipation needs. Verify that the operating temperature range of -40 to 170°C meets the environmental conditions of the intended deployment scenario.

Part Context

This part belongs to the B57211P series of NTC inrush current limiters designed by EPCOS (now TDK). These components are engineered to protect sensitive electronic circuits from high initial charging currents when power is applied. The series utilizes negative temperature coefficient technology to provide high resistance at startup, which decreases as the device heats up during normal operation.

Replacement Considerations

Compatible substitutes include other B57211P series variants with similar electrical characteristics, such as B57211P0470M301 or B57211P0209M301, provided they match the specific resistance and current requirements of the design.

FAQ

What is the maximum steady-state current rating for this component?

The maximum steady-state current rating is 5 A.

What is the resistance value at 25°C?

The resistance at 25°C is 5 Ohms with a tolerance of ±20%.

What is the operating temperature range?

The operating temperature range is from -40°C to 170°C.