The LP-18-400-NF-X (150W) from Times Microwave Systems is a RF Surge Protector with Frequency 0 to 6000 MHz, Input Power 150 W, Return Loss 23 dB, Storage Temperature -40 to 85 Degree C, Surge Current 10kA multiple (8x20µs wave-form). More details for LP-18-400-NF-X (150W) can be seen below.