Experimental and theoretical data show that a new compact lightning arrestor can be incorporated into a multipin connector housing to protect components in missile, aircraft, and ground systems from lightning energy. This energy is sometimes transmitted into component compartments causing component burnout, ignition of explosives, and circuit malfunctions. By properly incorporating the lightning arrestor-connector, these effects can be minimized or eliminated. The lightning arrestor-connector concept has been analyzed, and prototype devices have been tested extensively at Sandia Laboratories. Production for use in several missile systems has begun. The design and initial development of the device is described along with data demonstrating the device behavior under simulated lightning tests.