SL225R012B

Overview

The SL225R012B is a negative temperature coefficient (NTC) thermistor inrush current limiter manufactured by Vishay Ametherm. It features a radial leaded package with a 22 mm diameter and a kinked lead configuration for secure PCB mounting. The component has a nominal resistance of 5 ohms and an electrical rating of 12 A. It is designed to protect switching power supplies from damaging inrush currents during initial power-up.

Feature Summary

• Provides effective limitation of inrush current to protect sensitive components in switching power supplies
• Features a kinked lead design for secure mechanical attachment to printed circuit boards
• Utilizes NTC thermistor technology to reduce resistance as temperature increases during operation

Applications

• Switching power supply input protection
• Electronic equipment power stage initialization
• Consumer electronics power management circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm physical dimensions and lead style. Ensure the selected variant matches the required kinked lead configuration for the intended PCB footprint. Cross-reference the part number with the latest Vishay datasheet to validate compliance requirements and thermal characteristics before finalizing procurement.

Selection Notes

Select this component based on the required steady-state current handling capability and initial resistance value for the target application. Consider the maximum allowable voltage rating and the thermal time constant relative to the power supply startup sequence. Evaluate the physical size constraints to ensure the 22 mm diameter fits within the available board space without interfering with adjacent components.

Part Context

This device belongs to the SL22 series of MegaSurge inrush current limiters, which are engineered for robust performance in high-reliability applications. The series offers various resistance and current ratings to accommodate different power levels. Vishay Ametherm designs these components to provide consistent protection across industrial and consumer electronic markets.

Replacement Considerations

SL225R012B