The MBP25C from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 25 V, Series Resistance 0.45 to 0.70 Ohms, Thermal Resistance 40 Degree/W, Capacitance 0.20 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP25C can be seen below.