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. 691-2265
Mfr. Part No.MOC3021
BrandLite-On
SGD0.764
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
SGD0.522
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 168-9677
Mfr. Part No.LTV-846
BrandLite-On
SGD1.00
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. 691-2221
Mfr. Part No.LTV-846
BrandLite-On
SGD1.18
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. 168-9699
Mfr. Part No.6N139S-L
BrandLite-On
SGD1.198
Each (In a Tube of 50)
units
Surface Mount Transistor 1.7V 1 8 SMD DC - 20 mA 5 kVrms Yes 5000% 500 % -
RS Stock No. 691-2356
Mfr. Part No.6N139S-L
BrandLite-On
SGD1.876
Each (In a Pack of 5)
units
Surface Mount Transistor 1.7V 1 8 SMD DC - 20 mA 5 kVrms Yes 5000% 500 % -
RS Stock No. 168-9695
Mfr. Part No.6N137-L
BrandLite-On
SGD1.26
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 1 8 DIP DC 20ns 15 mA 5 kVrms Yes - - 6.6ns
RS Stock No. 168-9502
Mfr. Part No.LTV-217
BrandLite-On
SGD0.283
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3.75 kVrms - 600% - 3µs
RS Stock No. 125-7563
Mfr. Part No.4N35
BrandLite-On
SGD0.334
Each (In a Tube of 65)
units
Through Hole - 1.5V 1 6 PDIP DC - 60 mA 3550 Vrms - - - -
RS Stock No. 127-8454
Mfr. Part No.LTV-217
BrandLite-On
SGD0.311
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 691-2325
Mfr. Part No.6N137-L
BrandLite-On
SGD1.948
Each (In a Pack of 5)
units
Through Hole Transistor 1.7V 1 8 DIP DC 20ns 15 mA 5 kVrms Yes - - 6.6ns
RS Stock No. 168-9658
Mfr. Part No.LTV-814S-TA1
BrandLite-On
SGD0.239
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.4V 1 4 SMT AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 691-2218
Mfr. Part No.LTV-844
BrandLite-On
SGD1.645
Each (In a Pack of 2)
units
Through Hole Transistor 1.4V 4 16 PDIP AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 168-9673
Mfr. Part No.LTV-827
BrandLite-On
SGD0.497
Each (In a Tube of 50)
units
Through Hole Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 125-7569
Mfr. Part No.CNY17-2
BrandLite-On
SGD0.401
Each (In a Tube of 65)
units
Through Hole - 1.65V 1 6 PDIP DC - 60 mA 5000 Vrms - - - -
RS Stock No. 125-7575
Mfr. Part No.CNY17-4
BrandLite-On
SGD0.316
Each (In a Tube of 65)
units
Through Hole - 1.65V 1 6 PDIP DC - 60 mA 5000 Vrms - - - -
RS Stock No. 691-2120
Mfr. Part No.LTV-817A
BrandLite-On
SGD0.361
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. 691-2209
Mfr. Part No.LTV-827S-TA1
BrandLite-On
SGD0.564
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 168-9676
Mfr. Part No.LTV-844
BrandLite-On
SGD1.448
Each (In a Tube of 25)
units
Through Hole Transistor 1.4V 4 16 PDIP AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 168-9693
Mfr. Part No.MOC3063S-TA1
BrandLite-On
SGD0.318
Each (On a Reel of 1000)
units
Surface Mount Phototriac - 1 6 PDIP - - 50 mA 5 kVrms - - - -