The MBP100E from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 100 V, Series Resistance 0.5 to 0.9 Ohms, Thermal Resistance 55 Degree/W, Capacitance 0.20 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP100E can be seen below.