Input Voltage Inrush Current Limiter Inrush Current Limiters Up To 120vac SL03 - SL08 Series Up To 240vac SL10 - SL32 Series Up To 480vac MS15 - MS32 Series Up To 680vac MS35 Series Full Line SL03 - MS35 UL & CSA Recognized UL & CSA - SL Series

### Inrush Current Limiter Information

 Inrush Current LimitersPower Electronics article on applications of inrush current limiting thermistors - Power Thermistors Inrush Current FAQFrequently Asked Questions about inrush current limiting thermistors -Power Thermistors Inrush Current in TransformersA sample application of inrush current limiters in transformers. Inrush Current Causes and PreventionA summary of what causes inrush current and how it can be addressed. How To Select An Inrush Current LimiterMore Detailed explanation of selecting an inrush current limiter -Power Thermistor. Thermal Time ConstantWhat is the thermal time constant of an inrush current limiter.

## Select an Inrush Current Limiter - Power Thermistor

### With Inrush Current Calculators

Step 1
Use the maximum allowable inrush current and Ohm's Law to determine the least allowable resistance at turn on for your application.

### Lowest Resistance Calculator

 V*1.414/A Input Voltage Max Inrush (A) Lowest Resistance Needed

Step 2
Determine the maximum steady state current that will flow through the Inrush Current Limiter.

 Vac/P(out) * 90% efficiency Output Power Input Voltage Steady State Current

Step 3
Using the formula J = ½CV², determine how much input energy the thermistor will absorb when the device is turned on.

### Joules Calculator

 Voltage (Vpeak) Capacitance (µF) Total Energy (J)

Step 4
Select a part from this list or any of the links to datasheets and get samples or click on a link to get it from one of our worldwide partners.