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. 547-3740
Mfr. Part No.HCPL-2601-000E
BrandBroadcom
MYR9.18
Each
units
Through Hole Transistor 1.75V 1 8 DIP DC 24ns 20 mA 3.75 kVrms Yes - - 10ns
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. 450-812
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
MYR12.89
Each (In a Pack of 2)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs
RS Stock No. 756-3570
Mfr. Part No.TLP570(F)
BrandToshiba
MYR4.234
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. 922-5633
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
MYR8.719
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. 178-4827
Mfr. Part No.H11L1M
MYR1.331
Each (In a Bag of 1000)
units
Through Hole Logic Gate 1.5V - 6 DIP DC 0.1µs 60 mA 7.5 kVrms Yes - - 0.1µs
RS Stock No. 671-1393
Mfr. Part No.H11L1M
MYR3.828
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. 885-1070
Mfr. Part No.TLP188(GB,E(T
BrandToshiba
MYR3.529
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. 178-3156
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR8.34
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. 547-3879
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
MYR10.56
Each
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
RS Stock No. 547-4153
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
MYR27.33
Each
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 178-3161
Mfr. Part No.HCPL-7840-000E
BrandBroadcom
MYR22.716
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 3.4µs - 3.75 kVrms Yes - - -
RS Stock No. 168-9662
Mfr. Part No.LTV-817A
BrandLite-On
MYR0.635
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. 168-9683
Mfr. Part No.MOC3021
BrandLite-On
MYR1.515
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 903-4229
Mfr. Part No.FOD8523SD
MYR2.794
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. 453-1687
Mfr. Part No.CNY17-3X
BrandIsocom
MYR1.856
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. 756-3716
Mfr. Part No.TLP759(LF2,J,F)
BrandToshiba
MYR17.16
Each
units
Through Hole Phototransistor 1.85V 1 8 DIP DC - 25 mA 5000 V ac Yes 40% - -
RS Stock No. 808-8840
Mfr. Part No.FOD8523S
MYR3.332
Each (In a Pack of 10)
units
Surface Mount Darlington 1.4V 1 4 MDIP DC 300µs 50 mA 5000 Vrms - 15000% - 100µs
RS Stock No. 165-2468
Mfr. Part No.4N35
BrandVishay
MYR1.30
Each (In a Tube of 50)
units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5 kVrms - 50% 40 % -
RS Stock No. 691-2265
Mfr. Part No.MOC3021
BrandLite-On
MYR2.13
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -