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The 1N3721 is a 22 mA / 100 pF germanium tunnel diode.



Peak current 22 mA ±2.5%
Valley current < 3.1 mA (typ. 2.1 mA)
Peak voltage 65 mV
Valley voltage 355 mV
Capacitance < 100 pF (typ. 55 pF)
Series Resistance 1 Ω max.
Negative conductance 190 mS
Self-resonant frequency 780 MHz
Rise time 1.2 ns