High Voltage HEMP Filters

API Technologies High Voltage HEMP Filters are designed to... API Technologies (formerly known as Spectrum Control) High Voltage HEMP Filters are designed to protect sensitive electronics equiptment during hazardous transient conditions. They are employed to absorb a potentially destructive overshoot voltage. Under normal operating conditions, the suppressor circuit exhibits high off-state impedance that appears transparent to the circuits they protect. If a voltage exceeding the switching voltage is applied to the circuit, the suppressor circuit switches to very low impedance, effectively shorting out the high voltage. The suppressor circuit will remain in the low impedance state until the current flowing through the suppressor is either interrupted, or drops to a safe level. Once this occurs, the suppressor resets and returns to a high off-state impedance.