Optocouplers

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. 805-1267
Mfr. Part No.6N137M
Brandonsemi
kr 18,024
Each (In a Pack of 5)
Units
Through Hole Logic Gate 1.8V 1 8 MDIP DC 30ns 50 mA 5000 Vrms Yes - - 10ns
RS Stock No. 166-1710
Mfr. Part No.6N137M
Brandonsemi
kr 6,811
Each (In a Bag of 1000)
Units
Through Hole Logic Gate 1.8V 1 8 MDIP DC 30ns 50 mA 5 kVrms Yes - - 10ns
RS Stock No. 922-6447
Mfr. Part No.HCPL-4506-300E
BrandBroadcom
kr 21,625
Each (In a Tube of 50)
Units
Surface Mount Transistor 1.8V 1 8 DIP DC 5ns 25 mA 3750 Vrms Yes 90% - 5ns
RS Stock No. 803-0826
Mfr. Part No.HCPL-4506-300E
BrandBroadcom
kr 32,484
Each (In a Pack of 5)
Units
Surface Mount Transistor 1.8V 1 8 DIP DC 5ns 25 mA 3750 Vrms Yes 90% - 5ns
RS Stock No. 178-7005
Mfr. Part No.MOC3022M
BrandLite-On
kr 3,833
Each (In a Tube of 65)
Units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 691-2280
Mfr. Part No.MOC3022M
BrandLite-On
kr 4,37
Each (In a Pack of 5)
Units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 631-1182
Mfr. Part No.ILD206T
BrandVishay
kr 13,709
Each (In a Pack of 10)
Units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4 kVrms - 125% 63 % -
RS Stock No. 159-6466
Mfr. Part No.ILD206T
BrandVishay
kr 6,517
Each (On a Reel of 2000)
Units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4 kVrms - 125% 63 % -
RS Stock No. 178-3211
Mfr. Part No.ACPL-H342-000E
BrandBroadcom
kr 26,291
Each (In a Tube of 80)
Units
Surface Mount Phototransistor 1.95V 1 8 SOIC DC 22ns 16 mA 3.75 kVrms Yes - - 18ns
RS Stock No. 691-2325
Mfr. Part No.6N137-L
BrandLite-On
kr 13,154
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. 691-2265
Mfr. Part No.MOC3021
BrandLite-On
kr 6,502
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
kr 4,235
Each (In a Tube of 65)
Units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 734-4947
Mfr. Part No.ACPL-H342-000E
BrandBroadcom
kr 43,27
Each
Units
Surface Mount Phototransistor 1.95V 1 8 SOIC DC 22ns 16 mA 3750 V ac Yes - - 18ns
RS Stock No. 145-4480
Mfr. Part No.HCPL0701
Brandonsemi
kr 20,834
Each (In a Tube of 50)
Units
Surface Mount Darlington Photodetector 1.7V 1 8 SOIC DC - 20 mA 2.5 kVrms Yes 2600% - -
RS Stock No. 168-9695
Mfr. Part No.6N137-L
BrandLite-On
kr 8,423
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. 903-4263
Mfr. Part No.HCPL0701
Brandonsemi
kr 23,20
Each (In a Pack of 5)
Units
Surface Mount Darlington Photodetector 1.7V 1 8 SOIC DC - 20 mA 2500 Vrms Yes 2600% - -
RS Stock No. 710-4853
Mfr. Part No.CNY17-3X007T
BrandVishay
kr 7,871
Each (In a Pack of 10)
Units
Surface Mount Phototransistor 1.65V 1 6 PDIP DC 3µs 60 mA 5300 V ac - 200% 100 % 14µs
RS Stock No. 796-5165
Mfr. Part No.TLP220G
BrandToshiba
kr 32,40
Each
Units
Through Hole MOSFET 1.75V 1 4 DIP AC 0.1ms 100 mA 5000 Vrms - - - 0.2ms
RS Stock No. 773-3669
Mfr. Part No.VO2223A-X001
BrandVishay
kr 22,18
Each (In a Bag of 2)
Units
Through Hole Phototriac 1.4V 1 7 DIP DC - 50 mA 5300 Vrms - - - -
RS Stock No. 796-5184
Mfr. Part No.TLP2958
BrandToshiba
kr 18,22
Each (In a Pack of 5)
Units
Through Hole Infrared LED 1.7V 1 8 DIP AC 15ns 10 mA 5000 Vrms Yes - - 10ns