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. 903-4229
Mfr. Part No.FOD8523SD
MYR2.764
Each (In a Pack of 10)
units
Surface Mount Photodarlington 1.4V 1 4 PDIP DC 100µs - 5000 V ac Yes 15000% - 20µs
RS Stock No. 699-8155
Mfr. Part No.4N35
BrandVishay
MYR1.46
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. 691-2233
Mfr. Part No.LTV-847
BrandLite-On
MYR3.245
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. 547-4153
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
MYR26.54
Each
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 168-9679
Mfr. Part No.LTV-847
BrandLite-On
MYR2.74
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. 145-1837
Mfr. Part No.4N37
BrandVishay
MYR1.441
Each (In a Tube of 50)
units
Through Hole Transistor 1.5V 1 6 DIP DC 10µs 50 mA 5 kVrms - 50% - 10µs
RS Stock No. 168-7431
Mfr. Part No.TLP558(F)
BrandToshiba
MYR12.831
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.7V 1 8 DIP DC 75ns 10 mA 2.5 kVrms Yes - - 75ns
RS Stock No. 691-2265
Mfr. Part No.MOC3021
BrandLite-On
MYR2.048
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 547-3879
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR11.74
Each
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
RS Stock No. 168-9662
Mfr. Part No.LTV-817A
BrandLite-On
MYR0.698
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 160% 80 % 3µs
RS Stock No. 168-8557
Mfr. Part No.CNY17-3X
BrandIsocom
MYR1.813
Each (In a Tube of 65)
units
Through Hole Transistor 1.65V - 6 DIP - 2µs 60 mA 5.3 kVrms - 200% 200 % 2µs
RS Stock No. 178-3156
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR8.30
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
RS Stock No. 165-2468
Mfr. Part No.4N35
BrandVishay
MYR1.46
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. 453-7512
Mfr. Part No.PS2501-4
MYR13.45
Each
units
Through Hole Transistor 1.4V 4 16 PDIP DC 3µs 80 mA 5000 Vrms - 600% 80 % 5µs
RS Stock No. 756-3716
Mfr. Part No.TLP759(LF2,J,F)
BrandToshiba
MYR14.58
Each
units
Through Hole Phototransistor 1.85V 1 8 DIP DC - 25 mA 5000 V ac Yes 40% - -
RS Stock No. 145-2598
Mfr. Part No.TCMT4100
BrandVishay
MYR3.24
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.6V 4 16 Mini-Flat DC 3µs 60 mA 3.75 kVrms - 600% 50 % 4.7µs
RS Stock No. 839-9979
Mfr. Part No.HCNW4504-300E
BrandBroadcom
MYR11.70
Each (In a Pack of 2)
units
Surface Mount Phototransistor 1.95V 1 8 DIP DC - 400 mA 5000 Vrms Yes 68% - -
RS Stock No. 919-0076
Mfr. Part No.CNY17-3
BrandVishay
MYR1.08
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. 178-0898
Mfr. Part No.CNY17F-2
BrandVishay
MYR1.72
Each (In a Tube of 65)
units
Through Hole Phototransistor 1.65V 1 6 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 691-2182
Mfr. Part No.LTV-817S
BrandLite-On
MYR0.966
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
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