VT20N2
Photoconductive Cell; 34 Kilohms (Typ.); 500 Kilohms (Min.); 0.80 (Typ.)

From Excelitas Technologies Sensors

Diameter, Lead0.016 in.
Dimensions0.178 in. L x 0.140 in. H x 0.209 in. Dia.
Gamma0.80 (Typ.)
Length, Lead1 in.
Package TypeTO-46
Power Dissipation50 mW
Resistance34 K (1 fc)
Resistance, Dark500 K
Resistance, Light34 Kiloohms (Typ.)
Temperature, Operating, Maximum75 °C
Temperature, Operating, Minimum-40 °C
Time, Fall8 ms (Typ.) @ 1 fc
Time, Rise78 ms (Typ.) @ 1 fc
Voltage, Rating100 V peak

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