SL324R023

Overview

The SL324R023 is a MegaSurge NTC inrush current limiter manufactured by Vishay Ametherm. It features a nominal resistance of 4 Ohms with a tolerance of ±20% at 25°C. The component supports a maximum steady-state current of 23 Amps up to 65°C and has a mechanical diameter of 32mm. Key electrical specifications include a dissipation factor of 65.4 mW/C, a pitch spacing of 4.33 mm, and a maximum recommended energy rating of 200 Joules.

Feature Summary

• Provides effective limitation of high inrush currents during power-up phases
• Utilizes negative temperature coefficient thermistor technology for self-regulating resistance
• Designed for robust performance in high-energy surge applications

Applications

• Power supply input stages
• Transformer primary circuits
• Capacitive load protection

Procurement Notes

Verify the specific datasheet version for the SL324R023 to confirm UL or CSA recognition status, as availability varies by region. Ensure the application voltage does not exceed the component's rated limits. Confirm that the physical footprint matches the 32mm diameter and radial lead spacing requirements before finalizing the design.

Selection Notes

Select this component when a 4-ohm initial resistance is required to limit peak charging currents. The 23-amp steady-state rating suits moderate power applications. Consider the 200-joule energy rating for capacitive loads. Verify thermal management needs, as the device operates effectively within standard ambient temperatures up to 65°C without derating.

Part Context

This part belongs to the SL32 series of MegaSurge inrush current limiters from Vishay Ametherm. The series offers various resistance and current ratings tailored for different power levels. These components are widely used in industrial and consumer electronics to protect downstream circuitry from damage caused by sudden current spikes.

Replacement Considerations

Consult official Vishay documentation for direct cross-references. Similar parts in the SL32 family may offer different resistance values or current capacities. Ensure any substitute maintains the same 32mm form factor and electrical ratings to fit existing PCB layouts.