SL2212103B

Overview

The SL2212103B is a radial lead inrush current limiter from the SL22 series, manufactured by Vishay Ametherm. It features a 22 mm diameter disc with a nominal resistance of 120 Ohms at 25°C and a tolerance of ±25%. The device supports a steady-state maximum current of 3 A and is rated for voltages up to 115 VAC and 230 VAC. Physical dimensions include a width of 6 mm, lead diameter of 1 mm, and lead spacing of 7.8 mm. It utilizes kinked leads for PCB mounting and carries UL approval.

Feature Summary

• Utilizes NTC thermistor technology to suppress high inrush currents during power-up
• Features kinked radial leads designed for secure PCB mounting
• Provides UL certification for safety compliance

Applications

• Transformer protection against inrush current
• Capacitive load switching circuits
• Power supply input stages

Procurement Notes

Verify the specific suffix 'B' corresponds to the kinked lead configuration required for your assembly process. Confirm that the 120 Ohm initial resistance and 3 A steady-state current rating align with the thermal and electrical constraints of the target circuit design before finalizing orders.

Selection Notes

Select this component when a 22 mm form factor is required for thermal management. Ensure the application voltage does not exceed 230 VAC. Consider the 120 Ohm cold resistance impact on startup time and the 3 A continuous current limit for steady-state operation requirements.

Part Context

This part belongs to the SL22 series of inrush current limiters. It shares the standard 22 mm diameter package geometry with other variants in the family but differs in resistance and current ratings. The series is designed for general-purpose circuit protection applications.

Replacement Considerations

Cross-reference with MS2212103B for similar MegaSurge series specifications. Verify lead type compatibility as the SL22 uses kinked leads while other series may use straight leads.