The HLM-20PSM from Marki Microwave is a Power Limiter with Frequency DC to 20 GHz, Input Power P1 dB 15 dBm, Peak Input Power 46.99 dBm, Peak Input Power 50 W, Limited Output Power 36.99 dBm. Tags: Surface Mount, Schottky Diode. More details for HLM-20PSM can be seen below.