AA119

The AA119 is a germanium general-purpose diode listed in the Agenda radioelectronistului (2nd edition, 1989) among the diodes of IPRS Băneasa, which made it only at the customer’s request; it has a peak reverse voltage VRM of 45 V and comes in a DO-7 (F-2) glass package with 1…3 coloured rings [1]. The package drawing is in the Gallery.

The code is printed „AA 119”. The table gives a peak reverse voltage VRM of 45 V, a reverse voltage VR of 30 V, a forward current IF of 50 mA, a surge forward current IFSM of 500 mA, a maximum forward voltage VFM of 2.2 V at IF = 10 mA and a maximum reverse current IRM of 150 µA at VR = 30 V [1].

A note to the table says that these diodes are not made routinely at IPRS-Băneasa, only at the customer’s request („nu se fabrică în mod curent la IPRS-Băneasa, ci doar la cererea beneficiarului”) [1].

The table of germanium signal and switching diodes of the same section prints the 1N 541 as „1N 541 (AA 119)”, with the same VRM of 45 V; that table has other columns (IFAV, VF at 5 mA, trr) [3].

Coded as (Pro Electron system) [2]:

Part	Meaning
A	base material with an activation energy of 0.6–1 eV, e.g. germanium (0.67 eV)
A	low-power signal diode
119	serial number: three digits (100–999), for components for general use