AS321R030100

Overview

The Vishay Ametherm AS321R030100 is a radial leaded inrush current limiter (ICL) designed for PCB mounting. It features a nominal resistance of 1 Ohm with a tolerance of ±25%. The component has a maximum steady-state current rating of 30 A and supports voltage ratings of 120 VAC, 240 VAC, 480 VAC, and 680 VAC. Physical dimensions include a diameter of 30 mm, width of 7.8 mm, and lead spacing of 17.1 mm. The dissipation factor is specified at 79.4 mW/C.

Feature Summary

• Provides inrush current protection for input energy levels ranging from 250 to 1000 joules
• Supports steady-state currents between 10A and 50A within the SSI range
• UL approved for safety compliance

Applications

• Power supply units requiring surge protection
• Industrial control systems
• Consumer electronics power inputs

Procurement Notes

Verify the specific suffix against official Vishay documentation to ensure correct resistance and current ratings. Confirm RoHS compliance status through the manufacturer's datasheet or certification documents before procurement. Check for any regional distribution restrictions or specific handling requirements listed in the product specifications.

Selection Notes

Select this component based on the required 1 Ohm resistance and 30 A current capacity. Ensure the PCB layout accommodates the 30 mm diameter and 17.1 mm lead spacing. Verify that the application's input energy does not exceed the 1000 joule limit defined for the series.

Part Context

This part belongs to the AS32 series of inrush current limiters manufactured by Vishay / Ametherm. These components are thermistors designed to limit initial charging current in capacitive loads. The series offers various resistance values and physical sizes to match different power requirements.

Replacement Considerations

Public confirmed substitute part numbers: None identified.