The MBP200M from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 200 V, Series Resistance 0.6 to 1.2 Ohms, Thermal Resistance 20 Degree/W, Capacitance 0.50 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP200M can be seen below.