Inrush Current Solutions

Inrush Current Limiters are used to reduce the inrush current that occurs when an electrical device is switched on. High inrush current is the result of the maximum instantaneous input current drawn by an electrical device during the initial power up. As technology continues to advance, most systems today run efficiently and maintain a low impedance which in turn contributes to high inrush current.

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Inrush Current Limiters

as-series

The AS Series of Inrush Current Limiters are used in high energy applications and short term high current.

surge-gard

Surge-Gard Inrush Current Limiters Formerly of RTI Electronics.

Standard Inrush Current Limiters

Standard Inrush Current Limiters come in a wide array of sizes, values, and ratings.

bigampscaled

The Big AMP series of Inrush Current Limiters are used in high energy applications and short term high current.

MS35 Inrush Current Limiter

The MS35 is our most rugged Inrush Current Limiter for up to 680 volts.

PTC Inrush Current Limiters

PTC Thermistor for Inrush Current Protection.  Rated for up to 680 Volts.

ul-and-csa-approved-updated

These Inrush Current Limiters are UL and CSA approved.

Mini Amp Miniature Inrush Current Limiters where cool operation is desired

The Mini-AMP Inrush Current Limiter is great for compact power applications.

Mega Surge Inrush Current Limiters

The Mega Surge Inrush Current Limiters are best used when you have higher than average voltage and current requirements.

Inrush Current Limiter Data Sheets

Additionally, devices that produce alternating current such as electric motors or transformers can draw several times their steady state current at switch on.

Although this additional draw of inrush often lasts less than ½ of a normal 60 hertz cycle, that is enough time to cause possible damage to the equipment.

 

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Equations to Calculate Inrush Current

Calculate Inrush Current in Three Steps

Why do I need to Use Inrush Current Calculators to Select an Inrush Current Limiter? An Inrush Current Limiter (ICL) can protect electrical equipment from overheating at switch-on due to inrush current. And, because inrush current equals the maximum instantaneous surge of incoming current from a power source, it can equate to as much as 2-3 times the steady state current of the attached device. So, Inrush Current Calculators are the … Continue Reading

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Alternative Energy Applications for MS35 Inrush Current Limiters

Application Overview Ametherm’s MS35 series inrush current limiting thermistors play a key role in alternative energy applications by avoiding current spikes in the power generated by wind turbines, solar panels, and other sources as it’s fed into batteries, inverters, and other energy storage components. The MS35 devices are also used to regulate the release of battery energy in electric vehicles and in pre-charge circuits for many different types of battery … Continue Reading

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Toroidal Transformer Inrush Current Issues Got You Down? We’ve Got the Answer

What You Need to Know About Toroidal Transformer Inrush Current Toroidal Transformer Inrush Current can cause some serious damage if not appropriately managed. Inrush current can cause circuit breakers to trip and fuses to blow. Additionally, it can cause a complete failure of the transformer itself. And if that weren’t enough to give you a headache, excessive inrush current can also limit the total number of devices which can be … Continue Reading

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Resource Center

Inrush current limiting solutions, tips and tricks.

Inrush Current Limiters

Inrush Current APP Notes

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