General Description
The 4N25, 4N26, 4N27, and 4N28 series of optoisolatiors has a silicon npn Planar phototransistor coupled to a GaAs diode. Each is mounted in a 8-pin plastic dual in-line package.

Glassolated™
High Current Transfer Ratio - Typically 50%
500 V to 2500 V minimum isolation input-To-Output
1011Ω Isolation Resistance
Low Coupling Capacitance - Typically 1.0 pF