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Designed to limit inrush current when power is applied to a system Surge-Gard NTC thermistors help reduce circuit failures and lower rectifier costs by reducing peak forward surge current ratings. Surge-Gard is manufactured using specifically formulated metal oxide ceramic materials, allowing thermistors to suppress high inrush current surges. Surge-Gard thermistors feature steady state current ratings ranging from 1 to 36 amps and resistance values from 0.5Ω to 220Ω.