AmethermMS22
Inrush Current Limiters
Input VoltageInrush Current Limiter
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
As322r025
 

Inrush Current Limiter Information

Inrush Current Limiters
Power Electronics article on applications of inrush current limiting thermistors - Power Thermistors
Inrush Current FAQ
Frequently Asked Questions about inrush current limiting thermistors -Power Thermistors
Inrush Current in Transformers
A sample application of inrush current limiters in transformers.
 
Inrush Current Causes and Prevention
A summary of what causes inrush current and how it can be addressed.
How To Select An Inrush Current Limiter
More Detailed explanation of selecting an inrush current limiter -Power Thermistor.
Thermal Time Constant
What 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.

 

Steady State Current Calculator

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.