AS325R020

Overview

The AS325R020 is a radial lead inrush current limiter from the SL32 series, manufactured by Vishay Ametherm. It features a nominal resistance of 5 Ohms with a tolerance of ±25%. The component is rated for a steady-state current of 20 A and supports voltage ratings up to 480 VAC. It has a cylindrical body diameter of 32 mm (1.181 inches) and utilizes radial termination for PCB mounting.

Feature Summary

• Provides effective limitation of high inrush currents during power-up sequences
• Features negative temperature coefficient characteristics for automatic resistance reduction after startup
• Includes UL approval for compliance with safety standards

Applications

• Power supply input stages
• Transformer primary circuits
• Motor drive inputs

Procurement Notes

Verify that the specific part number matches the required electrical parameters, particularly the 5 Ohm resistance and 20 A current rating. Confirm that the 32 mm diameter fits the available PCB space. Ensure the application voltage does not exceed the 480 VAC limit. Check for UL certification requirements if applicable to the end product.

Selection Notes

Select this component when a 5 Ohm initial resistance is required to limit inrush current to 20 A. Consider the 32 mm physical size for board layout constraints. Verify compatibility with the system's operating voltage up to 480 VAC. Compare against other series like MS or SL if different thermal or mechanical properties are needed.

Part Context

This device belongs to the SL32 family of NTC thermistors designed for general-purpose inrush current limiting. It shares the standard radial lead form factor and cylindrical package geometry common to Vishay Ametherm's SL series components used in AC/DC conversion applications.

Replacement Considerations

SL325R020