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marquardt electrical components are surge absorbers/varistor assemblies. Due to their nonlinear resistance change with voltage, they exhibit symmetry in both directions (positive and negative). They respond to abnormal voltages on the line, absorbing most of the surge/spike energy while suppressing the abnormal voltage to a safe range, thereby improving line safety and stability. In standby mode, surge absorbers (varistors) have very high impedance (several megaohms) relative to the protected electronic components and do not affect the characteristics of the original circuit design. However, when an instantaneous surge occurs