What Electronics Will Survive an EMP?

Updated September 23, 2026

No consumer electronics can be guaranteed to survive every electromagnetic pulse. Survival depends on pulse characteristics, field strength, distance, device design, cable length, operating state, and whether power, data, or antenna conductors are attached. Small disconnected electronics are generally easier to protect than equipment connected to long wires or the power grid.

Electronics Most Likely to Be Recoverable

What Makes Electronics Vulnerable?

Long conductors can collect electromagnetic energy and carry transients into connected equipment. Grid power, antennas, Ethernet, coaxial cable, telephone lines, solar wiring, and generator leads all create possible entry paths. Switching a device off is different from disconnecting every cable.

Faraday Storage for Small Backups

A conductive enclosure can reduce radiated energy when it provides continuous shielding at seams and closures. Disconnect every cable, prevent the device from touching the conductive shell, and inspect reusable bags for wear. A simple phone-call test is not a certification across all relevant frequencies.

The active Faraday Defense NX3 bag kit provides several sizes for disconnected electronics. Match bag size and closure instructions to the equipment.

Connected Home Equipment

Panel-mounted protection addresses conducted transients on selected wiring; it does not turn the house into a Faraday cage. A layered plan considers utility power, grounding and bonding, antennas, communications, solar, generators, and protected spares.

The active EMP Shield home model is one possible service-panel layer. Installation should follow the manufacturer, code, and a qualified electrician's assessment. Review the exact test configuration and do not interpret it as a guarantee that every connected device will survive every event.

Vehicles and Generators

Published testing does not justify calling all older vehicles safe or all newer vehicles doomed. Outcomes depend on the vehicle and exposure. Practical resilience includes maintenance, spare fuses and relays, alternative transportation, fuel planning, and—if chosen—properly installed protection such as the active vehicle EMP Shield.

For generators, store portable units with leads disconnected when practical. Modern inverter and standby generators contain electronic controls, so consider protected model-specific spares and a simpler backup power method.

A Priority Backup Kit

• Weather or shortwave radio
• LED lighting and compatible batteries
• Phone or tablet with offline maps and documents
• Charging cables and DC adapters
• Portable power bank
• Storage drive with critical records
• Spare charge controller or communications components

Common Myths

• “Unplugged means invulnerable.” It reduces conductive paths but is not an unlimited guarantee.
• “A metal building protects everything.” Doors, seams, windows, and utilities can compromise shielding.
• “Old electronics always survive.” Simplicity may reduce some vulnerabilities, but exposure and wiring still matter.
• “One protector covers the entire property.” Different conductive paths and disconnected backups require different measures.

Bottom Line

The most practical candidates for survival are small, disconnected backup electronics stored in an appropriate conductive enclosure. Connected systems need layered protection and redundancy. Prioritize communications, lighting, information, charging, and critical replacement controls.

Source

• CISA EMP Protection and Resilience Guidelines