TRANSTECTOR's HT-RO-TSX-BNFM HEMP tested type N Female – Male bulkhead coaxial radio frquency (RF) surge protector, 698 MHz – 2.7 GHz, DC block, 500 W, IP67, 0.05 uJ, 40 kA, filter, low PIM. Bi-directional broadband DC short filter with rugged GDT technology provides electromagnetic pulse (EMP) RF surge protection for GPS and cellular applications. The TSX series of RF surge protection devices uses a patented high-pass filter design that allows for extremely low let-through voltage even at high surge current levels.