Optocoupler ICs

An optocoupler IC, 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 IC 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. 284-1190
Mfr. Part No.SFH6156-2T
BrandVishay
£0.67
Each
Units
Surface Mount Transistor 1.25V 1 4 SMD DC 3µs 60 mA 5300 Vrms - 125% 63 % 14µs
RS Stock No. 159-6455
Mfr. Part No.SFH6156-2T
BrandVishay
£0.213
Each (On a Reel of 1000)
Units
Surface Mount Transistor 1.25V 1 4 SMD DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 145-1578
Mfr. Part No.SFH615A-2
BrandVishay
£0.244
Each (In a Tube of 100)
Units
Through Hole Transistor 1.65V 1 4 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 110-185
Mfr. Part No.SFH615A-2
BrandVishay
£0.61
Each
Units
Through Hole Transistor 1.65V 1 4 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 110-208
Mfr. Part No.ILQ615-2
BrandVishay
£2.61
Each
Units
Through Hole Transistor 1.3V 4 16 PDIP DC 2.8µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 145-1580
Mfr. Part No.ILQ615-2
BrandVishay
£1.856
Each (In a Tube of 25)
Units
Through Hole Transistor 1.3V 4 16 PDIP DC 2.8µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 165-2468
Mfr. Part No.4N35
BrandVishay
£0.206
Each (In a Tube of 50)
Units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5 kVrms - 50% 40 % -
RS Stock No. 699-8155
Mfr. Part No.4N35
BrandVishay
£0.206
Each (In a Pack of 20)
Units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5000 V ac - 50% 40 % -
RS Stock No. 145-1599
Mfr. Part No.CNY74-4H
BrandVishay
£0.903
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. 699-8170
Mfr. Part No.CNY74-4H
BrandVishay
£1.406
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. 165-4936
Mfr. Part No.4N35-X009T
BrandVishay
£0.196
Each (On a Reel of 1000)
Units
Surface Mount Phototransistor 1.7V 2 6 SMD DC 10µs 60 mA 5 kVrms - 50% - 10µs
RS Stock No. 902-6638
Mfr. Part No.4N35-X009T
BrandVishay
£0.44
Each (In a Pack of 25)
Units
Surface Mount Phototransistor 1.7V 2 6 SMD DC 10µs 60 mA 5000 Vrms - 50% - 10µs
RS Stock No. 708-5409
Mfr. Part No.ILQ74
BrandVishay
£2.948
Each (In a Pack of 5)
Units
Through Hole Transistor 1.5V 4 16 PDIP DC - 60 mA 5300 V ac - 35% 12.5 % -
RS Stock No. 192-5354
Mfr. Part No.SFH618A-2
BrandVishay
£0.846
Each (In a Pack of 5)
Units
Through Hole Transistor 1.25V 1 4 PDIP DC 3µs 60 mA 5300 Vrms - 125% 63 % 14µs
RS Stock No. 165-2475
Mfr. Part No.SFH618A-2
BrandVishay
£0.372
Each (In a Tube of 100)
Units
Through Hole Transistor 1.25V 1 4 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 919-0121
Mfr. Part No.ILQ74
BrandVishay
£2.101
Each (In a Tube of 25)
Units
Through Hole Transistor 1.5V 4 16 PDIP DC - 60 mA 5300 V ac - 35% 12.5 % -
RS Stock No. 919-0076
Mfr. Part No.CNY17-3
BrandVishay
£0.247
Each (In a Tube of 50)
Units
Through Hole Transistor 1.65V 1 6 DIP DC 3µs 60 mA 5 kVrms - 200% - 14µs
RS Stock No. 708-5291
Mfr. Part No.BRT12H
BrandVishay
£4.24
Each
Units
Through Hole Triac - 1 6 PDIP - - 20 mA 5300 V ac - - - -
RS Stock No. 773-3693
Mfr. Part No.VO615A-5
BrandVishay
£0.358
Each (In a Bag of 5)
Units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5000 Vrms - 150% - 4.7µs
RS Stock No. 170-8252
Mfr. Part No.VO615A-5
BrandVishay
£0.169
Each (In a Tube of 100)
Units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5 kVrms - 150% - 4.7µs