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. 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. 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. 415-304
Mfr. Part No.TLP701(TP,F)
BrandToshiba
MYR7.37
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. 145-1837
Mfr. Part No.4N37
BrandVishay
MYR1.191
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
MYR8.34
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. 760-3249
Mfr. Part No.TLP558(F)
BrandToshiba
MYR17.01
Each
units
Through Hole Logic Gate 1.7V 1 8 DIP DC 75ns 10 mA 2500 V ac Yes - - 75ns
RS Stock No. 756-3498
Mfr. Part No.TLP531(GR,F)
BrandToshiba
MYR3.598
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
RS Stock No. 699-8155
Mfr. Part No.4N35
BrandVishay
MYR1.535
Each (In a Pack of 20)
units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5000 V ac - 50% 40 % -
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. 691-2120
Mfr. Part No.LTV-817A
BrandLite-On
MYR0.99
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. 811-6172
Mfr. Part No.4N37
BrandVishay
MYR2.252
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. 168-9679
Mfr. Part No.LTV-847
BrandLite-On
MYR2.516
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. 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. 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. 166-2230
Mfr. Part No.FOD8523S
MYR1.667
Each (In a Bag of 2000)
units
Surface Mount Darlington 1.4V 1 4 MDIP DC 300µs 50 mA 5 kVrms - 15000% - 100µs
RS Stock No. 693-6794
Mfr. Part No.ACPL-244-500E
BrandBroadcom
MYR8.124
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 4 16 SOIC AC 2µs 50 mA 3 kVrms - 400% 20 % 3µs
RS Stock No. 919-0076
Mfr. Part No.CNY17-3
BrandVishay
MYR1.081
Each (In a Tube of 50)
units
Through Hole Transistor 1.65V 1 6 DIP DC 3µs 60 mA 5 kVrms - 200% - 14µs
RS Stock No. 453-7528
Mfr. Part No.PS2501L-1
MYR3.80
Each
units
Surface Mount Transistor 1.4V 1 4 SMT DC 3µs 80 mA 5000 Vrms - 600% 80 % 5µs
RS Stock No. 145-2598
Mfr. Part No.TCMT4100
BrandVishay
MYR3.422
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.6V 4 16 Mini-Flat DC 3µs 60 mA 3.75 kVrms - 600% 50 % 4.7µs
RS Stock No. 699-8357
Mfr. Part No.TCMT4100
BrandVishay
MYR7.655
Each (In a Pack of 2)
units
Surface Mount Transistor 1.6V 4 16 Mini-Flat DC 3µs 60 mA 3750 V ac - 600% 50 % 4.7µs