AS321R036100

Overview

The AS321R036100 is a negative temperature coefficient (NTC) thermistor from the AS32 series, designed as an inrush current limiter. It features a nominal resistance of 1 Ohm at 25°C with a tolerance of ±25%. The component supports a maximum steady-state current of 36 A and operates across voltage ratings of 120 VAC, 240 VAC, 480 VAC, and 680 VAC. Physical dimensions include a diameter of 30 mm (1.181 inches), a width of 7.8 mm, and a lead spacing of 17.1 mm. It utilizes radial leads with a diameter of 0.8 mm and offers a dissipation factor of 79.4 mW/°C.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences to protect downstream components.
• Self-resetting operation allows automatic recovery to low resistance state after thermal stabilization.
• Capable of handling high steady-state currents up to 36 A for robust industrial applications.
• Complies with UL safety standards for enhanced reliability in electrical circuits.

Applications

• Power supply input stages
• Motor drive systems
• Industrial control equipment

Procurement Notes

Verify that the specific order matches the AS321R036100 part number exactly, ensuring the manufacturer is Vishay Ametherm. Confirm that the required steady-state current rating of 36 A and resistance value of 1 Ohm align with the circuit design requirements. Check for any specific packaging constraints or regional availability issues prior to finalizing the purchase order.

Selection Notes

Select this component when a 1 Ohm NTC thermistor is required for inrush current limiting in high-current applications. Ensure the operating environment supports the thermal characteristics defined by the 79.4 mW/°C dissipation factor. Verify that the physical footprint of 30 mm diameter fits within the available PCB space and that the radial lead configuration is compatible with the assembly process.

Part Context

This device belongs to the AS32 series of inrush current limiters manufactured by Vishay Ametherm. The series is characterized by its ability to handle significant current loads while maintaining compact physical dimensions. These components are widely used in scenarios requiring reliable protection against initial surge currents without permanent alteration to the circuit's operational state.

Replacement Considerations

Direct substitutes may include other Vishay Ametherm models within the AS32 series that match the 1 Ohm resistance and 36 A current rating. Cross-referencing datasheets is essential to ensure equivalent thermal and electrical performance characteristics before implementation.