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. 885-1171
Mfr. Part No.TLP2395(E(T
BrandToshiba
MYR5.085
Each (In a Pack of 10)
units
Surface Mount Photo IC 1.63V 1 5 SO6 - 15ns ±20 mA 3750 Vrms Yes - - 12ns
RS Stock No. 919-0060
Mfr. Part No.4N33
BrandVishay
MYR1.659
Each (In a Tube of 50)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 885-0976
Mfr. Part No.TLP291-4(E(T
BrandToshiba
MYR5.476
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.4V 1 16 SOIC DC 2µs 50 mA 2.5 kVrms - 400% - 3µs
RS Stock No. 315-668
Mfr. Part No.PC457L0NIP0F
BrandSharp
MYR10.678
Each (In a Pack of 5)
units
Surface Mount Transistor 1.95V 1 5 Mini-Flat DC - 25 mA 3.75 kVrms - 50% 19 % -
RS Stock No. 145-4282
Mfr. Part No.CNY173M
MYR0.819
Each (In a Bag of 1000)
units
Through Hole Transistor 1.65V 1 6 PDIP DC - 60 mA 7.5 kVrms - 200% 100 % -
RS Stock No. 178-3190
Mfr. Part No.HCPL-7860-300E
BrandBroadcom
MYR22.596
Each (In a Tube of 50)
units
Surface Mount Transistor 0.2V 1 8 DIP DC - 15 mA 3.75 kVrms Yes - - -
RS Stock No. 178-3157
Mfr. Part No.HCPL-3150-000E
BrandBroadcom
MYR8.579
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 799-5321
Mfr. Part No.TLP291(Y,SE(T
BrandToshiba
MYR0.889
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 DC 4µs 50 mA 3750 Vrms - 400% - 7µs
RS Stock No. 169-8586
Mfr. Part No.MOC207M
MYR1.097
Each (On a Reel of 3000)
units
Surface Mount Phototransistor 1.5V 1 8 SOIC DC 3.2µs 60 mA 2.5 kVrms - 200% 100 % 4.7µs
RS Stock No. 124-1743
Mfr. Part No.MOC207R2M
MYR0.997
Each (On a Reel of 2500)
units
Surface Mount Transistor 1.5V 1 8 SOIC DC 3.2µs 60 mA 2500 V ac - 200% 100 % 4.7µs
RS Stock No. 818-8372
Mfr. Part No.HCPL-7860-300E
BrandBroadcom
MYR33.40
Each
units
Surface Mount Transistor 0.2V 1 8 DIP DC - 15 mA 20 kV Yes - - -
RS Stock No. 178-3159
Mfr. Part No.HCPL-2731-000E
BrandBroadcom
MYR9.519
Each (In a Tube of 50)
units
Through Hole Darlington 1.7V 2 8 PDIP DC - 20 mA 5 kVrms Yes 5000% 400 % -
RS Stock No. 903-4263
Mfr. Part No.HCPL0701
MYR7.722
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. 671-1352
Mfr. Part No.4N35M
MYR2.668
Each (In a Pack of 5)
units
Through Hole Transistor 1.5V 1 6 PDIP DC - 60 mA 7.5 kVrms - - 100 % -
RS Stock No. 166-2137
Mfr. Part No.HCPL0701R2
MYR3.984
Each (On a Reel of 2500)
units
Surface Mount Darlington 1.7V 1 8 MDIP DC - 20 mA 2.5 kVrms Yes 5000% - -
RS Stock No. 773-0247
Mfr. Part No.VOM617A-4X001T
BrandVishay
MYR2.11
Each (On a Tape of 25)
units
Surface Mount Phototransistor 1.6V 1 4 SOP DC 7µs 60 mA 3750 Vrms - 320% - 12µs
RS Stock No. 896-2489
Mfr. Part No.TLP183(GB,E(T
BrandToshiba
MYR0.896
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 805-1267
Mfr. Part No.6N137M
MYR5.47
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
MYR1.995
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. 168-7424
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
MYR10.849
Each (In a Tube of 50)
units
Surface Mount IGBT Gate Drive, MOSFET 1.8V 2 8 PDIP DC 15ns 20 mA 3.75 kVrms - - - 8ns