The MZB604-CS19-1 from MACOM is a RF Schottky Diode with Peak Reverse Voltage 4 V min.@ 100 µA, Forward continuous Current 35 mA, Power Dissipation 100 mW, Capacitance 0.2 pF, Operating Temperature -65 to + 150 Degrees C. Tags: Surface Mount, P Type. More details for MZB604-CS19-1 can be seen below.