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Inrush Current Limiting
        Power Thermistors


Inrush Current Limiters

MegaSurge Inrush Current Limiters

Inrush Current Protection for big power supplies, motor drives, and audio amplifiers. more info>>
 

BigAmp Inrush Current Limiters

Specially designed thermistor able to withstand up to 36 amperes of continuous current and 260 joules of input energy.Inrush Current Limiters more info>>




Power Thermistor Data

Input Voltage Inrush Current Limiter
Up To 120vac SL03 - SL10 Series
Up To 240vac SL10 - SL32 Series
Up To 480vac MS15 - MS32 Series
Up To 680vac MS22 - MS35 Series
   
Full Line SL03 - MS35
UL & CSA Recognized UL & CSA - SL Series
News
1/31/2010
Ametherm Announces New Partnership With Rhopoint Components. more info>>
1/05/2010
RTI Electronics Announces Planned Liquidation of Assets. more info>>
12/15/2009 Ametherm receives CSA certification on all SL22 Series Power Thermistors for Inrush Current Limiting.
   
Applications Info

What is Inrush Current?

When motors, audio amplifiers, and power supplies are first turned on, they present high initial currents as a result of filter capacitor impedance. more info>>

How To Stop Inrush Current

There are several component options for inrush current limiting. The two most common alternatives are the use of NTC (Negative Temperature Coefficient) thermistors or various forms of active circuits. more info>>
Inrush Current Application Notes

Inrush Current Limiters
Power Electronics article discusses applications and uses of inrush current limiting thermistors  


Inrush Current FAQ
Frequently Asked Questions about inrush current limiting thermistors.
Inrush Current in Transformers
A sample application of inrush current limiters in transformers 

Surge Current Causes and Prevention
A summary of inrush current causes and prevention
Ametherm Imax Derating Curve
Ametherm Derating Curve  
Ametherm Zero Power Resistance Curve
Ametherm Zero Power Resistance Curve  

 

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