Part | RoHS | Manufacturer | Optoelectronic Type | Mounting Feature | Terminal Finish | Configuration | Maximum Dark Current | Control Current | No. of Functions | Maximum Forward Current | No. of Elements | Nominal Supply Voltage | Packing Method | Output Circuit Type | Maximum Response Time | Sub-Category | Minimum Supply Voltage | Maximum Operating Temperature | Height | Nominal Response Time | Minimum Operating Temperature | Minimum Collector-emitter Breakdown Voltage | Nominal Current Transfer Ratio | Maximum Isolation Voltage | Control Voltage | Maximum Power Dissipation | Nominal Data Rate | Input Type | Additional Features | Minimum Current Transfer Ratio | Length | JESD-609 Code | Maximum Forward Voltage | Maximum On State Current |
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An optocoupler is an electronic device that uses an optical sensor to transfer electrical signals between two circuits. The two circuits are physically isolated from each other and are connected only by a beam of light that is emitted by an LED and detected by a photodetector.
The optocoupler transistor output is the electrical signal that is generated by the photodetector in response to the light emitted by the LED. The output signal is used to control or communicate with the circuit that is connected to the optocoupler.
Optocouplers are commonly used in applications where electrical isolation is required, such as in power supplies, motor control, and medical equipment. The isolation provided by the optocoupler helps to protect sensitive electronic components and circuits from electrical interference and noise.