Optocoupler ICs

An optocoupler, also known as an opto-isolator or photocoupler, is a semiconductor device which is used to couple isolated circuits. Within an optocoupler you will find a light emitter and a light sensor. Optocouplers usually come in a semiconductor package, such as SOIC or PDIP.

How does an optocoupler work?
Optocouplers work by transferring energy from one circuit to another circuit via an optical transmission path, while providing electrical isolation
The light emitter device can come in the form of an LED (light emitting diode) that produces IR or visible light, or a laser diode. The light emitter receives the input and converts it into a light signal. The light detector senses the light emitter and converts it back into an electrical signal.

Optocouplers are often used in high-voltage applications to block the high voltages and variations in voltage. This ensures that, if there is a spike in one part of a circuit, it will not affect other parts. Therefore they are ideal for applications which may experience variations in voltage.

Types of Optocoupler:
• Resistive
• Photodiode
• Phototransistor
• Bidirectional

Output Types
• CMOS
• Darlington
• IGBT Gate Drive
• Logic Gate
• MOSFET
• Photodarlington
• Phototransistor
• Single Transistor
• TRIAC

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Description Price Mounting Type Output Device Maximum Forward Voltage Number of Channels Number of Pins Package Type Input Current Type Typical Rise Time Maximum Input Current Isolation Voltage Logic Output Maximum Current Transfer Ratio Minimum Current Transfer Ratio Typical Fall Time
RS Stock No. 908-7273
Mfr. Part No.OPI1268
BrandOptek
MYR26.05
Each
units
Through Hole Transistor 1.6V 1 5 DIP DC - 50 mA 16 kV dc Yes - - -
RS Stock No. 170-0764
Mfr. Part No.OPI 1264B
BrandOptek
MYR9.89
Each (In a Bag of 25)
units
Through Hole Transistor 1.6V 1 4 - DC - 40 mA 10 kV dc - - 50 % -
RS Stock No. 170-0946
Mfr. Part No.OPI1264A
BrandOptek
MYR15.006
Each (In a Bag of 25)
units
Through Hole NPN Phototransistor, Photosensor 1.6V - 4 - DC - 40 mA 15 kV dc Vrms - Minimum of 25% - -
RS Stock No. 880-1965
Mfr. Part No.OPI1280-026
BrandOptek
MYR25.03
Each
units
Through Hole NPN Phototransistor 2.3V - 4 - DC - - 15 kV - - - -
RS Stock No. 880-1968
Mfr. Part No.OPI1264A
BrandOptek
MYR14.845
Each (In a Pack of 2)
units
Through Hole NPN Phototransistor, Photosensor 1.6V - 4 - DC - 40 mA 10 Vrms - Minimum of 25% - -
RS Stock No. 170-0942
Mfr. Part No.OPI120
BrandOptek
MYR36.36
Each (In a Bag of 25)
units
Through Hole Photodarlington, Photosensor, Phototransistor 1.5V - 5 - DC 2µs 150 mA 15 kV dc Vrms - 50% - 2µs
RS Stock No. 170-0945
Mfr. Part No.OPI1280-026
BrandOptek
MYR33.371
Each (In a Bag of 100)
units
Through Hole NPN Phototransistor 2.3V - 4 - DC - - 15 kV dc Vrms - - - -
RS Stock No. 170-0941
Mfr. Part No.OPI1264C
BrandOptek
MYR9.89
Each (In a Bag of 25)
units
Through Hole NPN Phototransistor, Photosensor 1.6V - 4 - DC - 40 mA 15 kV dc Vrms - Minimum of 100% - -
RS Stock No. 880-1955
Mfr. Part No.OPI120
BrandOptek
MYR37.10
Each
units
Through Hole Photodarlington, Photosensor, Phototransistor 1.5V - 5 - DC 2µs 150 mA 15 Vrms - 50% - 2µs
RS Stock No. 171-3892
Mfr. Part No.OPI 1264B
BrandOptek
MYR9.89
Each
units
Through Hole Transistor 1.6V 1 4 - DC - 40 mA 10 kV dc - - 50 % -
RS Stock No. 880-1952
Mfr. Part No.OPI1264C
BrandOptek
MYR9.89
Each (In a Pack of 2)
units
Through Hole NPN Phototransistor, Photosensor 1.6V - 4 - DC - 40 mA 10 Vrms - Minimum of 100% - -