MS321R036B

Inrush Current Limiters (ICL) Overview

The MS321R036B is a radial leaded NTC thermistor inrush current limiter manufactured by Vishay Ametherm. 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 up to 65°C and can withstand an inrush energy of 160 Joules. It has a maximum voltage rating of 265 VAC, a diameter of 31 mm, and a lead spacing of 7.8 mm.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective limitation of high inrush currents during power-up sequences
• Utilizes negative temperature coefficient characteristics for automatic resistance adjustment
• Designed for through-hole mounting with robust radial lead configuration

Inrush Current Limiters (ICL) Applications

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

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix against the official Vishay datasheet to ensure correct tolerance and package dimensions. Confirm that the application environment remains within the specified maximum steady-state current and thermal limits. Check for UL qualification requirements if safety certification is mandatory for the end product.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required cold resistance value and the peak inrush energy expected in the circuit. Ensure the steady-state current rating exceeds the operational load current. Verify that the physical dimensions fit the available PCB space and that the lead pitch matches the board layout.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL32/MS32 series of NTC inrush current limiters from Vishay Ametherm. These components are widely used in electronic equipment to protect sensitive downstream components from damage caused by high initial charging currents when capacitors are connected to a power source.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include the AS321R036100N and SL321R036B. Verify that alternative parts match the 1 Ohm resistance, 36 A current rating, and 160 J energy absorption capability before implementation.