SL225R012

Overview

The SL225R012 is a negative temperature coefficient (NTC) thermistor designed as an inrush current limiter. It features a nominal resistance of 5 Ohms with a tolerance of ±20%. The component has a maximum steady-state current rating of 12 A and a diameter of 22 mm. It utilizes radial leads for PCB mounting and is UL approved for safety compliance.

Feature Summary

• Provides effective limitation of high inrush currents to protect switching power supply components from damage.
• Utilizes NTC thermistor technology to reduce resistance as temperature increases during operation.

Applications

• Switching power supplies
• Power electronics circuits
• Electronic equipment requiring surge protection

Procurement Notes

Verify the specific datasheet version and UL certification status directly with Vishay or authorized distributors before integration. Confirm that the 12 A current rating and 5 Ohm resistance align with the target circuit's thermal and electrical requirements to ensure reliable long-term performance.

Selection Notes

Select this component when a 22 mm diameter form factor is required for thermal mass and current handling. Ensure the design accommodates the radial lead spacing and PCB mount style. Consider the 12 A steady-state limit and 5 Ohm initial resistance to match the specific inrush suppression needs of the application.

Part Context

This part belongs to the SL22 series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance values and current ratings within a standardized 22 mm diameter package, providing consistent physical dimensions for designers while allowing flexibility in electrical specifications.

Replacement Considerations

No public substitute part numbers are confirmed in the provided documentation. Cross-referencing requires matching the 5 Ohm resistance, 12 A current rating, and 22 mm diameter constraints.