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. 450-812
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
TWD105.00
Each (In a Pack of 2)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs
RS Stock No. 922-5633
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
TWD104.90
Each (In a Tube of 50)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3750 V ac Yes - - 0.1µs
RS Stock No. 166-2235
Mfr. Part No.HCPL2611
TWD28.60
Each (In a Bag of 1000)
units
Through Hole Photodetector 1.8V 1 8 PDIP DC 50ns 50 mA 2.5 kVrms Yes - - 12ns
RS Stock No. 917-5532
Mfr. Part No.MOCD217M
TWD27.80
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.3V 2 8 SOIC DC 3.2µs 200 mA 2500 V ac Yes 100% - 4.7µs
RS Stock No. 547-4197
Mfr. Part No.HCPL-7800-000E
BrandBroadcom
TWD681.00
Each
units
Through Hole Transistor - 1 8 PDIP - 4.3µs - 3.75 kVrms Yes - - -
RS Stock No. 373-1167
Mfr. Part No.AQY210EHA
BrandPanasonic
TWD129.00
Each
units
Surface Mount MOSFET 1.5V - 4 SMT DC - 50 mA 5 kVrms - - - -
RS Stock No. 168-9681
Mfr. Part No.MOC3020
BrandLite-On
TWD13.90
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 691-2306
Mfr. Part No.MOC3063
BrandLite-On
TWD18.00
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 919-0092
Mfr. Part No.IL300
BrandVishay
TWD116.70
Each (In a Tube of 50)
units
Through Hole Photodiode 1.5V 1 8 PDIP DC 1.75µs 60 mA 5300 V ac - - - 1.75µs
RS Stock No. 691-2328
Mfr. Part No.6N138-L
BrandLite-On
TWD37.20
Each (In a Pack of 5)
units
Through Hole Phototransistor 1.7V 1 8 DIP DC - 20 mA 5 kVrms Yes 2600% 2000 % -
RS Stock No. 761-4530
Mfr. Part No.MOCD217R2M
TWD34.60
Each (In a Pack of 5)
units
Surface Mount Transistor 1.3V 2 8 SOIC DC 3.2µs 60 mA 2500 V ac - 130% 100 % 4.7µs
RS Stock No. 922-5860
Mfr. Part No.HCPL-7800-000E
BrandBroadcom
TWD271.30
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 4.3µs - 3750 V ac Yes - - -
RS Stock No. 178-3205
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
TWD78.70
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 708-5364
Mfr. Part No.IL300
BrandVishay
TWD170.20
Each (In a Pack of 5)
units
Through Hole Photodiode 1.5V 1 8 PDIP DC 1.75µs 60 mA 5300 V ac - - - 1.75µs
RS Stock No. 178-7558
Mfr. Part No.MOCD217R2M
TWD10.90
Each (On a Reel of 2500)
units
Surface Mount Transistor 1.3V 2 8 SOIC DC 3.2µs 60 mA 2.5 kVrms - 130% 100 % 4.7µs
RS Stock No. 450-874
Mfr. Part No.HCPL-7710-300E
BrandBroadcom
TWD178.00
Each
units
Surface Mount Transistor 6.5V - 8 DIP DC 9ns 10 mA 3.75 kVrms Yes - - 8ns
RS Stock No. 281-5422
Mfr. Part No.HCPL-7860-000E
BrandBroadcom
TWD206.00
Each
units
Through Hole Transistor 0.2V - 8 DIP DC - 15 mA 3.75 kVrms Yes - - -
RS Stock No. 761-3647
Mfr. Part No.H11N1M
TWD197.00
Each (In a Pack of 2)
units
Through Hole Schmitt Trigger 2V 1 6 DIP DC 7.5ns 30 mA 7500 V Yes - - 12ns
RS Stock No. 922-6573
Mfr. Part No.CNY17-3-300E
BrandBroadcom
TWD11.00
Each (In a Tube of 65)
units
Surface Mount Transistor 1.7V 1 6 PDIP DC 5µs 60 mA 5000 V ac - 200% 100 % 5µs
RS Stock No. 671-2768
Mfr. Part No.MOCD207R2M
TWD35.00
Each (In a Pack of 5)
units
Surface Mount Transistor 1.55V 2 8 SOIC DC 1.6µs 60 mA 2.5 kVrms - 200% 100 % 2.2µs