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The 0A2 or OA2 is a cold cathode voltage stabiliser. 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 thin glass tube envelope is 17 mm in diameter, and excluding the B7G base pins, is 56 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.