The MBP200O from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 200 V, Series Resistance 1.6 to 3.2 Ohms, Thermal Resistance 55 Degree/W, Capacitance 0.07 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP200O can be seen below.