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. 818-8375
Mfr. Part No.HCPL-817-00DE
BrandBroadcom
€0.24
Each (In a Pack of 25)
units
Through Hole Transistor 1.4V 1 4 DIP DC 4µs 5 mA 5000 Vrms - 600% - 3µs
RS Stock No. 178-3247
Mfr. Part No.HCPL-817-00DE
BrandBroadcom
€0.138
Each (In a Tube of 100)
units
- - - - - - - - - - - - - -
RS Stock No. 547-4074
Mfr. Part No.HCNR201-000E
BrandBroadcom
€4.49
Each
units
Through Hole Photodiode 1.95V 1 8 PDIP-W DC - 25 mA 5 kVrms - - - -
RS Stock No. 922-5835
Mfr. Part No.HCNR201-000E
BrandBroadcom
€2.677
Each (In a Tube of 42)
units
Through Hole Photodiode 1.95V 1 8 PDIP-W DC - 25 mA 5000 V ac - - - -
RS Stock No. 145-1599
Mfr. Part No.CNY74-4H
BrandVishay
€1.002
Each (In a Tube of 25)
units
Through Hole Transistor 1.6V 4 16 PDIP DC 3µs 60 mA 5.3 kVrms - 600% 50 % 4.7µs
RS Stock No. 708-5437
Mfr. Part No.K847PH
BrandVishay
€1.154
Each (In a Pack of 10)
units
Through Hole Transistor 1.6V 4 16 DIP DC 3µs 60 mA 5000 V ac - 600% 50 % 4.7µs
RS Stock No. 169-6122
Mfr. Part No.K847PH
BrandVishay
€1.155
Each (In a Tube of 25)
units
Through Hole Transistor 1.6V 4 16 DIP DC 3µs 60 mA 5 kVrms - 600% 50 % 4.7µs
RS Stock No. 699-8170
Mfr. Part No.CNY74-4H
BrandVishay
€1.562
Each (In a Pack of 5)
units
Through Hole Transistor 1.6V 4 16 PDIP DC 3µs 60 mA 5300 V ac - 600% 50 % 4.7µs
RS Stock No. 450-957
Mfr. Part No.HCNW4503-000E
BrandBroadcom
€2.58
Each (In a Pack of 2)
units
Through Hole Transistor 1.85V 1 8 PDIP-W DC - 25 mA 3.75 kVrms Yes 50% 19 % -
RS Stock No. 922-5542
Mfr. Part No.HCPL-0601-000E
BrandBroadcom
€1.072
Each (In a Tube of 100)
units
Surface Mount Transistor 1.75V 1 8 SOIC DC 0.024µs 150 mA 3750 V ac Yes - - 0.01µs
RS Stock No. 168-9679
Mfr. Part No.LTV-847
BrandLite-On
€0.595
Each (In a Tube of 25)
units
Through Hole Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 796-5175
Mfr. Part No.TLP2955
BrandToshiba
€1.49
Each (In a Pack of 5)
units
Through Hole Logic Gate 1.7V 1 8 DIP AC 16ns 10 mA 5000 Vrms Yes - - 14ns
RS Stock No. 691-2233
Mfr. Part No.LTV-847
BrandLite-On
€0.695
Each (In a Pack of 2)
units
Through Hole Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 168-7797
Mfr. Part No.TLP2955
BrandToshiba
€0.777
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.7V 1 8 DIP AC 16ns 10 mA 5 kVrms Yes - - 14ns
RS Stock No. 173-2229
Mfr. Part No.K1010 B
BrandCosmo
€0.132
Each (On a Reel of 2000)
units
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS Stock No. 885-1174
Mfr. Part No.TLP2955(F)
BrandToshiba
€0.918
Each (In a Pack of 10)
units
Through Hole Photo IC 1.7V 1 8 DIP - 16ns 25 mA 5000 Vrms Yes - - 14ns
RS Stock No. 167-263
Mfr. Part No.HCPL-0601-000E
BrandBroadcom
€2.01
Each
units
Surface Mount Transistor 1.75V 1 8 SOIC DC 0.024µs 150 mA 3.75 kVrms Yes - - 0.01µs
RS Stock No. 922-5680
Mfr. Part No.HCNW4503-000E
BrandBroadcom
€1.751
Each (In a Tube of 42)
units
Through Hole Transistor 1.85V 1 8 PDIP-W DC - 25 mA 3750 V ac Yes 50% 19 % -
RS Stock No. 395-6344
Mfr. Part No.K1010 B
BrandCosmo
€0.242
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS Stock No. 699-8417
Mfr. Part No.VO610A-3X019T
BrandVishay
€0.297
Each (In a Pack of 20)
units
Surface Mount Phototransistor 1.6V 1 4 SMD - 3µs 60 mA 5000 V ac - 200% 100 % 4.7µs