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Optoisolator
An optoisolator (also known as optical coupler, optocoupler and opto-isolator) is a semiconductor device that uses a short optical transmission path to transfer an electrical signal between circuits or elements of a circuit, while keeping them electrically isolated from each other.
These components are used in a wide variety of communications, control and monitoring systems that use light to prevent electrical high voltage from affecting a lower power system receiving a signal.
Optoisolators are available in a multitude of package styles including rectangles, cylinders, and specialty configurations. These package types are designed to provide higher isolation voltages than what can be achieved with DIP and SMD packages.
While using the optoisolator, the designer may need to take into consideration the environmental conditions. For example, percentage of humidity in the environment would be a key consideration if the system requires 50,000 V of dc isolation.
If the humidity in the air is too high, an arc may occur around the optoisolator or along the surface of the PCB, resulting in a conductive path and shorting around the device. Distance, temperature, barometric pressure, type, and amount of contaminate in the air, as well as humidity, define the breakdown potential exterior to the optoisolator.
4N35 Optocoupler Phototransistor 30V 60mA 6 Pin
FEATURES
• Isolation test voltage 50..
R10.50
Ex Vat: R9.13
Ex Vat: R9.13
Mounting Type
Through Hole
Output Device
Transistor
Maxi..
R14.50
Ex Vat: R12.61
Ex Vat: R12.61
MOC3021 MOC 3021 Triac Optoisolator DIP 6Pin
FEATURES
• Excellent IFT stabilit..
R8.50
Ex Vat: R7.39
Ex Vat: R7.39
MOC3041 / MOC3040 Optocoupler Triac 6 Pin 400V
Applications:
■ Solenoid/valve controls
■ Li..
R13.50
Ex Vat: R11.74
Ex Vat: R11.74
PC817 is your standard optocoupler.
Use this IC to isolate two parts of a circuit.
Isolation p..
R3.50
Ex Vat: R3.04
Ex Vat: R3.04
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