NTE109 Germanium Diode Fast Switching General Purpose Description: The NTE109 is a high conductance device with good switching characteristics for low impedance circuits, high resistance–high conductance for efficient coupling, clamping and matrix service, and forward and inverse pulse recovery for critical pulse applications. Absolute Maximum Ratings: (TA = +25°C unles otherwise specified) Continuous Inverse Operating Voltage (Note 1), Vcont . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80V Continuous Average Forward Current, IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA Peak Recurrent Forward Current (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325mA Forward Surge Current (1 sec), IFSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA Electrical Characteristics: Peak Reverse Voltage, PRV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V Forward Voltage Drop (IF = 200mA), VF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0V Maximum Reverse Leakage (VR = 50V), IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100µA Additional Specifications: Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –78° to +90°C Absolute Maximum Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . –78° to +100°C Average Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mW/10°C Average Shunt Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5µfd Average 100mc Rect. Efficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55% Note 1 The continuous inverse operating voltage rating, Vcont must be reduced when the diode is operated at elevated junction temperature. The percent derating of Vcont for each 10°C temperature increment above 25°C is equal to Vcont/10. For critical high temperature–high voltage applications, is recommended that diodes be 100% tested and specified at the elevated temperature. Note 2 The peak operating current is generally the controlling factor in AC rectifier service and may be exceeded for pulses of less than 200µs duration. 1.000 (25.4) Min .300 (7.63) Typ .022 (.509) Dia Max .107 (2.72) Dia Max Color Band Denotes Cathode