Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 55633
Brand: Intermetall Halbleiterwerk, Düsseldorf
Tube type:  Solid-State-Diode   Universal 
Identical to M550
Similar Tubes
Normally replaceable-slightly different:

Base Wires
Was used by Technology / Measurement
Description Material/Aufbau: Germanium Mess-Diode;
Form/Case: (axial, Isolierstoffhülse), Farbpunkt: weiss;
Daten/ I F: 5 mA; U F: 1 V; I sp: 800 µA; U sp: 50 V; Imax: __ mA; Umax: 55 V; fg: <500 MHz; t op: -20...+60 °C;
Varianten: M550a = Umax: 60 V, M550b = Umax: 70 V - 
Dimensions (WHD)
incl. pins / tip
7 x 21 x 5 mm / 0.28 x 0.83 x 0.20 inch
Weight 1 g / 0.04 oz
Information source - - Manufacturers Literature   Intermetall, Radio-Arlt-Katalog 1954

intermetall_messdioden_3.png M550: Intermetall
Günther Stabe † 19.8.20

Collection of



You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information