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The 0A2/150C2 is a cold cathode voltage stabiliser. This valves displays both Type codes showing that the 150C2 and OA2 are directly equal.

The mean voltage stabilised is 150 Volts. Between the 5 mA minimum current and 30 mA maximum current the voltage regulation is 6 Volts. The striking voltage is 185 Volts.

The seam on the cathode cylinder.

The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins, is 59 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type 0A2 was first introduced in 1954. See also 1954 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.