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. 671-1393
Mfr. Part No.H11L1M
MYR4.294
Each (In a Pack of 5)
units
Through Hole Logic Gate 1.5V - 6 DIP DC 0.1µs 60 mA 7.5 kVrms Yes - - 0.1µs
RS Stock No. 922-5775
Mfr. Part No.HCPL-2601-000E
BrandBroadcom
MYR6.34
Each (In a Tube of 50)
units
Through Hole Transistor 1.75V 1 8 DIP DC 24ns 20 mA 3750 V ac Yes - - 10ns
RS Stock No. 885-1070
Mfr. Part No.TLP188(GB,E(T
BrandToshiba
MYR3.605
Each (In a Pack of 15)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 922-5633
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
MYR10.416
Each (In a Tube of 50)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3750 V ac Yes - - 0.1µs
RS Stock No. 756-3570
Mfr. Part No.TLP570(F)
BrandToshiba
MYR5.596
Each (In a Pack of 5)
units
Through Hole Phototransistor 1.3V 1 6 DIP DC 40µs 25 mA 2500 V ac Yes 2000% 1000 % 30µs
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. 168-8557
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. 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. 903-4229
Mfr. Part No.FOD8523SD
MYR3.591
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. 178-3161
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
MYR24.171
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 415-304
Mfr. Part No.TLP701(TP,F)
BrandToshiba
MYR7.795
Each (In a Pack of 2)
units
Surface Mount Logic Gate 1.7V 1 6 SDIP DC 0.05µs - 5 kVrms Yes - - 0.05µs
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. 547-3879
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR12.57
Each
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
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. 811-6172
Mfr. Part No.4N37
BrandVishay
MYR2.369
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V 1 6 DIP DC 10µs 50 mA 5000 Vrms - 50% - 10µs
RS Stock No. 547-4153
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
MYR28.41
Each
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 453-1687
Mfr. Part No.CNY17-3X
BrandIsocom
MYR1.964
Each (In a Pack of 10)
units
Through Hole Transistor 1.65V - 6 DIP - 2µs 60 mA 5.3 kVrms - 200% 200 % 2µs
RS Stock No. 145-1837
Mfr. Part No.4N37
BrandVishay
MYR1.47
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. 178-3156
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR8.894
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. 756-3498
Mfr. Part No.TLP531(GR,F)
BrandToshiba
MYR3.78
Each (In a Pack of 5)
units
Through Hole Phototransistor 1.3V 1 6 DIP DC 2µs 25 mA 2500 V ac - 300% 50 % 3µs