B57238S0250M000: High-Performance Inrush Current Limiter by EPCOS - TDK Electronics | Circuit Protection 2025-04-19 The B57238S0250M000 is a high-performance inrush current limiter by EPCOS - TDK Electronics, designed to protect circuits from excessive inrush currents. Features 25 Ohms resistance, 3.4A steady-state current, and UL approval.