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The CV2133 photocell is a gas filled device for enhanced sensitivity.
The normal anode voltage would be in the order of 90 Volts with 100 Volts as a maximum. The cathode current is 2 μA maximum and the sensitivity is 125 μA/Lumen.
The identification label marks this as a pre-production type approval sample.
See CV2133 for more details.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 46 mm tall.
 
Pin Connections