Inrush Current Limiter Calculator

When designing a circuit that uses an inrush current limiter, one of the most important parameters is the energy rating of the circuit. Once the energy rating of the circuit has been determined, a suitable inrush current limiter can be selected. This calculator helps to determine this energy rating.

Enter voltage and capacitance below in order to calculate energy. This will be populated automatically.

Voltage (peak VAC or VDC):   V
Capacitance:   µF
 
Energy (Joules):   J
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The below table lists some of the inrush current limiter series available through us by Ametherm, along with their specifications:

SL Series
SeriesMaximum Steady State CurrentResistance at +25°CMaximum Capacitance at 120VACMaximum Recommended Energy
SL031A to 2A10Ω to 220Ω100μF2J
SL050.25A to 3A4Ω to 120Ω200μF to 340μF3J to 12J
SL081.1A to 3A4Ω to 120Ω550μF to 697μF8J to 12J
SL101A to 5A10Ω to 30Ω700μF to 2000μF2J to 120J
SL121A to 10A1Ω to 220Ω1389μF to 2778μF10J to 60J
SL152A to 10A1Ω to 220Ω2778μF to 4167μF35J to 55J
SL183A to 12A0.7Ω to 47Ω4500μF to 8335μF65J to 120J
SL221A to 16A0.5Ω to 220Ω3473μF to 10000μF2J to 160J
SL3215A to 36A0.25Ω to 10Ω6946μF to 20839μF100J to 300J

MS Series
SeriesMaximum Steady State CurrentResistance at +25°CMaximum Capacitance at 120VACMaximum Recommended Energy
MS122A to 2A150Ω to 150Ω7500μF to 7500μF110J to 110J
MS154.2A to 4.2A30Ω to 40Ω9300μF to 9300μF135J to 135J
MS222A to 8A0.5Ω to 220Ω5100μF to 16400μF75J to 240J
MS326A to 40A0.5Ω to 50Ω13500μF to 20700μF250J to 300J
MS3510A to 50A0.5Ω to 20Ω34000μF to 62000μF500J to 800J

AS Series
SeriesMaximum Steady State CurrentResistance at +25°CMaximum Capacitance at 120VACMaximum Recommended Energy
AS326A to 36A0.5Ω to 50Ω17500µF to 20700µF250J to 300J
AS3510A to 50A0.5Ω to 20Ω500J to 800J

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