The 1N3712  (P/N 152-0189-00) is a 1 mA, 10 pF germanium tunnel diode

Data

Key Specifications

Peak current 1 mA +/- 10%
Valley current < 0.18 mA (typ. 0.12 mA)
Peak voltage 65 mV
Valley voltage 350 mV
Capacitance < 10 pF (typ. 5 pF)

Used in

Some instruments using part 1N3712

Instrument Manufacturer Class Model Description Introduced
Pentrix L20 Pentrix Plug-in L20 4 GHz Spectrum Analyzer plug-in 1963
Pentrix L30 Pentrix Plug-in L30 10.4 GHz Spectrum Analyzer plug-in (?)

Photos