Protect sensitive electronics during HPEM threats

22 August 2019

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The world’s most critical systems run on sophisticated digital systems and data centers that leverage a vast networking infrastructure. This critical infrastructure is increasingly vulnerable to disruption, and even destruction, from high levels of electromagnetic interference, which may be caused by a natural phenomenon or the result of malicious intent. Though it may be impossible to predict both intentional and unintentional high power electromagnetic (HPEM) threats, it is not impractical to protect against it. A new class of electrical filters, electromagnetic pulse (EMP) and high altitude EMP (HEMP) filters, are designed to suppress the EMI onslaught from nuclear strike level events, and lesser forms of EMI.

API Technologies’ HEMP/EMP Filters are designed to protect sensitive electronics equipment 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. These High Voltage HEMP Filters will also help meet the requirements of MIL-STD-188-125.

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