AS3540010

Overview

The AS3540010 is an NTC thermistor inrush current limiter from the AS35 series by Vishay Ametherm. It features a resistance of 40 Ohms at 25°C with a steady-state current rating of 10 A. The component has a diameter of 36 mm and utilizes radial leads with a spacing of 19 mm. Designed for PCB mounting, it provides surge protection against input energies ranging from 250 to 1000 joules.

Feature Summary

• Provides inrush current protection for high energy inputs
• Withstands high steady-state currents
• Minimizes high input energy absorption

Applications

• Power supply input stages
• Transformer protection
• DC circuit surge suppression

Procurement Notes

Verify the specific ordering suffix and tolerance requirements against the official Vishay datasheet before procurement. Confirm that the thermal environment supports the rated steady-state current. Ensure the PCB layout accommodates the radial lead spacing and physical dimensions for adequate heat dissipation during operation.

Selection Notes

Select this component when the application requires limiting inrush currents up to 10 A with a nominal resistance of 40 Ohms. Consider the 36 mm diameter for spatial constraints and verify compatibility with voltage ratings up to 680 VAC if applicable. Evaluate the B-parameter and energy absorption capabilities against the system's peak power demands.

Part Context

This part belongs to the AS35 series of NTC thermistors designed specifically for inrush current limiting. The series is recognized by Underwriters Laboratories for safety compliance. These components are engineered to protect electronic circuits from damage caused by high initial charging currents.

Replacement Considerations

Cross-reference with other Vishay AS35 series variants or equivalent NTC limiters from manufacturers like EPCOS or Murata. Ensure substitute parts match the 40 Ohm resistance, 10 A current rating, and 36 mm diameter specifications.