The MBP70E from Massachusetts Bay Technologies is a RF PIN Diode with Reverse Voltage 70 V, Series Resistance 0.45 to 0.50 Ohms, Thermal Resistance 50 Degree/W, Capacitance 0.25 pF, Operating Temperature -55 to 150 Degree C. Tags: Chip. More details for MBP70E can be seen below.