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. 124-1346
Mfr. Part No.HCPL2631
TWD70.20
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.75V 2 8 MDIP DC 50ns 30 mA 2500 V ac Yes - - 12ns
RS Stock No. 165-2586
Mfr. Part No.SFH6156-3T
BrandVishay
TWD9.80
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.65V 1 4 SMD DC 3µs 60 mA 5.3 kVrms - 200% 100 % 14µs
RS Stock No. 885-1253
Mfr. Part No.TLP352(D4,F)
BrandToshiba
TWD66.40
Each (In a Pack of 5)
units
Through Hole Photo IC 1.7V 1 8 DIP - 15ns 3 mA 3750 Vrms Yes - - 8ns
RS Stock No. 761-3375
Mfr. Part No.HCPL2631
TWD83.00
Each (In a Pack of 2)
units
Through Hole Logic Gate 1.75V 2 8 MDIP DC 50ns 30 mA 2500 V ac Yes - - 12ns
RS Stock No. 699-8225
Mfr. Part No.SFH6156-3T
BrandVishay
TWD25.50
Each (In a Pack of 10)
units
Surface Mount Transistor 1.65V 1 4 SMD DC 3µs 60 mA 5300 V ac - 200% 100 % 14µs
RS Stock No. 796-5171
Mfr. Part No.TLP2766
BrandToshiba
TWD65.60
Each (In a Pack of 5)
units
Surface Mount Infrared LED 1.7V 1 6 SDIP AC 15ns 15 mA 5000 Vrms Yes - - 15ns
RS Stock No. 178-3161
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
TWD190.30
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 168-7796
Mfr. Part No.TLP2766
BrandToshiba
TWD35.70
Each (In a Tube of 100)
units
Surface Mount Infrared LED 1.7V 1 6 SDIP AC 15ns 15 mA 5 kVrms Yes - - 15ns
RS Stock No. 207-579
Mfr. Part No.TLP222A-2(F)
BrandToshiba
TWD126.20
Each (In a Pack of 5)
units
Through Hole MOSFET - - 8 PDIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 547-4153
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
TWD230.00
Each
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 166-2444
Mfr. Part No.MOC3083M
TWD11.20
Each (In a Bag of 1000)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms - - - -
RS Stock No. 739-0256
Mfr. Part No.MOC3083M
TWD33.20
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac - - - -
RS Stock No. 177-4798
Mfr. Part No.TLP251(F)
BrandToshiba
TWD34.60
Each (In a Tube of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 885-1266
Mfr. Part No.TLP352F(D4,F)
BrandToshiba
TWD72.00
Each (In a Pack of 5)
units
Through Hole Photo IC 1.7V 1 8 DIP - 15ns 3 mA 3750 Vrms Yes - - 8ns
RS Stock No. 169-8548
Mfr. Part No.MOC3062M
TWD12.50
Each (In a Bag of 1000)
units
Through Hole Triac - 1 6 PDIP - - 60 mA 7.5 kVrms - - - -
RS Stock No. 547-3712
Mfr. Part No.HCPL-4503-000E
BrandBroadcom
TWD74.00
Each
units
Through Hole Transistor 1.7V 1 8 PDIP DC - 25 mA 3.75 kVrms Yes 50% 19 % -
RS Stock No. 625-8413
Mfr. Part No.TLP251(F)
BrandToshiba
TWD63.00
Each
units
Through Hole Buffer, Totem-Pole 1.8V 1 8 PDIP DC - 10 mA 2.5 kVrms Yes - - -
RS Stock No. 186-139
Mfr. Part No.TLP559(F)
BrandToshiba
TWD107.00
Each
units
Through Hole Phototransistor 1.85V 1 8 PDIP DC - 25 mA 2.5 kVrms Yes 40% 20 % -
RS Stock No. 178-3154
Mfr. Part No.HCPL-4503-000E
BrandBroadcom
TWD67.20
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 1 8 PDIP DC - 25 mA 3.75 kVrms Yes 50% 19 % -
RS Stock No. 453-0959
Mfr. Part No.IS452
BrandIsocom
TWD28.30
Each (In a Pack of 10)
units
Surface Mount Darlington 1.4V 1 4 PDIP DC 4µs 50 mA 3.75 kVrms - - 1000 % 3µs