Vishay, SFH618A-5 Phototransistor Output Optocoupler, Through Hole, 4-Pin DIP

The Vishay SFH618A feature a high current transfer ratio, low coupling capacitance and high isolation voltage. These coupler have a GaAs infrared diode emitter, which is optically coupled to silicon planar phototransistor detector, and is incorporated in a plastic DIP-4 package. The coupling device are designed for signal transmission between two electrically separated circuits

Good CTR linearity depending on forward current
Low CTR degradation
Low coupling capacitance
High common mode transient immunity

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