B57211P0409M351

Overview

The B57211P0409M351 is a leaded inrush current limiter from the P11 series by EPCOS (TDK Electronics). It features a nominal resistance of 4 Ohms at 25°C with a tolerance of ±20%. The component supports a maximum steady-state current of 5 A and has a disk diameter of 13 mm. It utilizes a standard lead spacing of 7.50 mm for through-hole mounting.

Feature Summary

• Provides effective inrush current limitation during power-up sequences to protect downstream electronic components.
• Features a robust coated disk design suitable for high thermal stability and reliable operation in various environments.

Applications

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

Procurement Notes

Verify the specific part number suffix against official TDK documentation to confirm exact electrical tolerances and packaging specifications. Ensure compatibility with existing PCB footprint dimensions, particularly the 7.50 mm lead spacing. Cross-reference safety certifications such as UL or VDE if required for end-product compliance. Confirm RoHS status via the latest datasheet before finalizing procurement orders.

Selection Notes

Select this component based on the required nominal resistance value of 4 Ohms and the maximum steady-state current rating of 5 A. Consider the physical dimensions, specifically the 13 mm diameter, to ensure adequate clearance on the printed circuit board. Evaluate the thermal characteristics and energy absorption capabilities relative to the expected surge currents in the target application environment.

Part Context

This component belongs to the P11 series of inrush current limiters manufactured by EPCOS, now part of the TDK Group. These devices are designed to mitigate high initial charging currents in capacitive loads. The series offers various resistance and current ratings to suit different power levels and system requirements across industrial and consumer markets.

Replacement Considerations

Consult official TDK cross-reference lists for verified substitutes. Generic equivalents may differ in thermal performance or certification status. Verify that any replacement matches the 4 Ohm resistance, 5 A current rating, and 13 mm form factor.

FAQ

What is the nominal resistance value of the B57211P0409M351?

The nominal resistance is 4 Ohms measured at 25°C.

What is the maximum steady-state current rating?

The component is rated for a maximum steady-state current of 5 A.