The MBP200R from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 200 V, Series Resistance 0.8 to 1.7 Ohms, Thermal Resistance 40 Degree/W, Capacitance 0.20 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP200R can be seen below.