The ML4617 from Spectrum Control is a RF PIN Diode with Forward Current 10 to 40 mA, Reverse Current 10 uA, Breakdown Voltage 100 to 120 V, Thermal Resistance 40 to 50 Degree C/W, Forward Resistance 1.3 to 1.5 Ohms. Tags: Surface Mount. More details for ML4617 can be seen below.