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. 168-9656
Mfr. Part No.LTV-354T
BrandLite-On
MYR0.678
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat AC 4µs 50 mA 5 kVrms - 400% 20 % 3µs
RS Stock No. 691-2072
Mfr. Part No.LTV-354T
BrandLite-On
MYR1.287
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat AC 4µs 50 mA 5 kVrms - 400% 20 % 3µs
RS Stock No. 691-2265
Mfr. Part No.MOC3021
BrandLite-On
MYR2.298
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 168-9683
Mfr. Part No.MOC3021
BrandLite-On
MYR1.929
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 168-9679
Mfr. Part No.LTV-847
BrandLite-On
MYR2.93
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. 168-9662
Mfr. Part No.LTV-817A
BrandLite-On
MYR0.762
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. 691-2120
Mfr. Part No.LTV-817A
BrandLite-On
MYR1.05
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 160% 80 % 3µs
RS Stock No. 691-2233
Mfr. Part No.LTV-847
BrandLite-On
MYR3.585
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. 127-8463
Mfr. Part No.LTV-817S-TA1
BrandLite-On
MYR0.867
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5000 Vrms - 600% - 3µs
RS Stock No. 178-7025
Mfr. Part No.LTV-817S
BrandLite-On
MYR0.762
Each (In a Tube of 100)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 691-2154
Mfr. Part No.LTV-817-C
BrandLite-On
MYR1.05
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 400% 200 % 3µs
RS Stock No. 168-9667
Mfr. Part No.LTV-817-C
BrandLite-On
MYR0.762
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 400% 200 % 3µs
RS Stock No. 168-9510
Mfr. Part No.LTV-817S-TA
BrandLite-On
MYR0.543
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 600% - 3µs
RS Stock No. 168-9685
Mfr. Part No.MOC3022
BrandLite-On
MYR1.575
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 691-2182
Mfr. Part No.LTV-817S
BrandLite-On
MYR1.05
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 691-2271
Mfr. Part No.MOC3022
BrandLite-On
MYR2.236
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 127-8462
Mfr. Part No.LTV-817S-TA
BrandLite-On
MYR0.826
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5000 Vrms - 600% - 3µs
RS Stock No. 691-2088
Mfr. Part No.LTV-357T
BrandLite-On
MYR0.982
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 173-2645
Mfr. Part No.LTV-357T
BrandLite-On
MYR0.535
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 168-9692
Mfr. Part No.MOC3063
BrandLite-On
MYR2.016
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -