The MBP200S from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 200 V, Series Resistance 0.7 to 1.4 Ohms, Thermal Resistance 35 Degree/W, Capacitance 0.30 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP200S can be seen below.