The ML4615 from Spectrum Control is a RF PIN Diode with Forward Current 10 to 40 mA, Reverse Current 10 uA, Breakdown Voltage 70 to 90 V, Thermal Resistance 40 to 50 Degree C/W, Forward Resistance 1 to 1.3 Ohms. Tags: Surface Mount. More details for ML4615 can be seen below.