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. 919-0060
Mfr. Part No.4N33
BrandVishay
SGD0.59
Each (In a Tube of 50)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 708-5285
Mfr. Part No.4N33
BrandVishay
SGD0.818
Each (In a Pack of 10)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 168-6126
Mfr. Part No.PS2502-4-A
SGD4.676
Each (In a Tube of 20)
units
Through Hole Darlington 1.4V 4 16 PDIP DC 100µs 80 mA 5 kVrms - 2000% 200 % 100µs
RS Stock No. 632-4857
Mfr. Part No.PS2502-4-A
SGD9.86
Each
units
Through Hole Darlington 1.4V 4 16 PDIP DC 100µs 80 mA 5000 Vrms - 2000% 200 % 100µs
RS Stock No. 547-4181
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
SGD11.87
Each
units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3.75 kVrms Yes - - -
RS Stock No. 922-5851
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
SGD8.536
Each (In a Tube of 45)
units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3750 V ac Yes - - -
RS Stock No. 896-2527
Mfr. Part No.TLP240A(F(O
BrandToshiba
SGD3.07
Each (In a Pack of 2)
units
Through Hole MOSFET 1.4V 1 4 DIP AC - 30 mA 5000 Vrms - - - -
RS Stock No. 178-3161
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
SGD8.579
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 799-5292
Mfr. Part No.TLP240A(F(O
BrandToshiba
SGD2.825
Each (In a Pack of 2)
units
Through Hole MOSFET 1.4V 1 4 DIP AC - 30 mA 5000 Vrms - - - -
RS Stock No. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
SGD0.664
Each (In a Tube of 65)
units
Through Hole Schmitt Trigger 1.5V 1 6 - DC 0.1µs 60 (Forward) mA 5 kVrms - - - 0.1µs
RS Stock No. 453-1722
Mfr. Part No.H11L1
BrandIsocom
SGD1.381
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V - 6 DIP - 0.5µs 50 mA 5 kVrms - - - 0.5µs
RS Stock No. 547-4153
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
SGD10.09
Each
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 178-3126
Mfr. Part No.HCNR200-000E
BrandBroadcom
SGD4.22
Each (In a Tube of 42)
units
- - - - - - - - - - - - - -
RS Stock No. 696-1248
Mfr. Part No.HCNR200-000E
BrandBroadcom
SGD5.93
Each
units
Through Hole Photodiode 1.95V 1 8 PDIP-W DC - 25 mA 5000 V ac - - - -
RS Stock No. 111-166
Mfr. Part No.H11G1
BrandIsocom
SGD1.56
Each
units
Through Hole Darlington 1.5V 1 6 DIP DC 100µs 50 mA 5.3 kVrms - - 1000 % 20µs
RS Stock No. 169-8704
Mfr. Part No.4N28SM
SGD0.349
Each (In a Bag of 1000)
units
Surface Mount Phototransistor 1.5V 1 6 DIP DC 2µs 3 A 7.5 kVrms Yes 10% - 2µs
RS Stock No. 805-1185
Mfr. Part No.4N28SM
SGD0.776
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.5V 1 6 DIP DC 2µs 3 A 7500 Vrms Yes 10% - 2µs
RS Stock No. 803-0778
Mfr. Part No.HCNW2601-000E
BrandBroadcom
SGD4.83
Each (In a Pack of 3)
units
Through Hole Photodetector 2.05V 1 8 DIP DC 24ns 20 mA 5000 Vrms Yes - - 10ns
RS Stock No. 903-4087
Mfr. Part No.6N137SDM
SGD1.68
Each (In a Pack of 10)
units
Surface Mount Photodetector 1.8V 1 8 DIP DC 30ns 200 mA 5000 V ac Yes - - 10ns
RS Stock No. 671-1416
Mfr. Part No.MCT62
SGD1.554
Each (In a Pack of 5)
units
Through Hole Phototransistor 1.5V 2 8 PDIP, PDIP-W DC - 60 mA 5 kVrms - - 100 % -