AS321R030765

Overview

The AS321R030765 is an inrush current limiter from the Vishay Ametherm AS32 series. It features a nominal resistance of 1 Ohm with a tolerance of 25%. The component has a current rating of 30 A and supports voltage ratings of 120 VAC, 240 VAC, 480 VAC, and 680 VAC. It utilizes radial leads for PCB mounting. The physical dimensions include a diameter of 30 mm and a width of 7.8 mm. The lead spacing is 17.1 mm with a pitch distribution of 4.8 mm. The loss factor is 79.4 mW/C.

Feature Summary

• Radial leaded construction designed for printed circuit board mounting
• Thermistor-based mechanism to limit initial surge currents during power-up
• Supports multiple AC voltage ratings including 120V, 240V, 480V, and 680V

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and availability status. Confirm that the radial lead configuration matches the target PCB footprint requirements. Check RoHS compliance details directly from the datasheet before finalizing procurement specifications.

Selection Notes

Select this component based on the required steady-state resistance and maximum allowable inrush current. Ensure the operating voltage does not exceed the rated limits for the specific application environment. Consider the thermal dissipation characteristics and the physical size constraints within the assembly layout.

Part Context

This part belongs to the AS32 series of inrush current limiters manufactured by Vishay / Ametherm. These components are NTC thermistors specifically engineered to protect electronic equipment from high transient currents. The series offers various resistance values and current ratings to suit different power levels.

Replacement Considerations

Direct substitutes may include other Vishay Ametherm parts within the AS32 family with matching electrical parameters. Cross-manufacturer replacements require verification of resistance, current rating, and physical dimensions.