• Use on 12V DC battery electrical systems only
  • Unique 3 stage surge protection with reverse polarity surge protection
  • 250kA surge current rating
  • Response time is almost instantaneous (Only limited by the electrical wiring inductance)
  • 10 gauge wire
  • Protects against all Transient Voltage spikes including Lightning, EMP and Solar Flare
  • Green Light = Protected, the surge protector is monitoring your electrical system
  • Red Light = Unprotected, the surge protector is damaged and needs to be replaced
  • Overwatch Protection Circuit
SKU: 12VEMP250KA Category:

12V DC Vehicle EMP protector rated at 250,000 amps of surge protection

Bad Wolf DC surge protection device SPD provides overvoltage protection. Built using our patented Overwatch protection circuitry that provides ultra-fast surge response and easy to read status indication.

12V EMP Defender

The SPD is built to handle surge currents up to 250,000 Amps (250kA). Designed using Metal Oxide Varistors (MOV), Transient Voltage Suppression (TVS) Diodes and Gas Discharge Tube (GDT) technology. With reaction speeds in the trillionth of a second and capable of surviving thousands of repetitive surges when we say this device is built tough that is an understatement. By using Military and Commercial grade components this SPD is designed to protect against every type of transient surge possible including EMP all phases, CME (coronal mass ejection), Solar Flare, Lightning and more...

Bad Wolf is a leader in high power surge protection devices SPDs and provides one of the largest selections of both AC or DC available. Bad Wolf is a Service-Disabled Veteran Owned Made in the USA company that is not only a contract manufacturer for private and federal agencies, but also backed by the SBA (small business administration) to provide custom solutions for consumer applications as well.

Additional information

Weight 9 oz
Dimensions 6 × 3.25 × 2 in

ATV, UTV, Motorcycle and more.., Commercial, Drone, Farm, Generator, Home, Irrigation, Marine, RV, Solar, Vehicle, Wind


MIL-STD, UL 1449

Connection Type

Ring Terminal

EM Rating

EMP (E1, E2 and E3 Phase), Solar Flare (CME)

Environment of Use

Indoor, Outdoor

Form Factor

Surface Mount

Product Dimensions


Product Weight


Service Type

DC Battery

Surge Current Rating (A)


Type of Surge Protection


Voltage (Vdc)


How powerful is this surge protector?

Answer: 250kA

How long are the wires?

Answer: 36 inches

What does the green light mean?

Answer: The surge protector is monitoring your electrical system and everything is ok

What does the red light mean?

Answer: Your electrical system has had a surge and the surge protector needs to be replaced