MFJ-270N Lighting Protector, N-Type, 400W PEP Safeguards radio equipment from damaging static electricity and lightning induced surge arrest traveling on coax. Ultra-fast gas discharge tube safely shunts up to 5000 amps of peak impulse current harmlessly to an independent ground. 50 Ohm Impedance Handles up to 400 Watts PEP N-Type connectors