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. 166-2444
Mfr. Part No.MOC3083M
€0.257
Each (In a Bag of 1000)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms - - - -
RS Stock No. 739-0256
Mfr. Part No.MOC3083M
€0.77
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac - - - -
RS Stock No. 166-2128
Mfr. Part No.MID400S
€1.455
Each (In a Bag of 1000)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 178-4755
Mfr. Part No.MOC3021M
€0.408
Each (In a Tube of 50)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 862-9381
Mfr. Part No.MID400S
€1.31
Each (In a Pack of 5)
units
Surface Mount Open Collector 1.5V 1 8 DIP AC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 739-0240
Mfr. Part No.MOC3021M
€0.524
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac Yes - - -
RS Stock No. 166-1683
Mfr. Part No.6N137SM
€0.395
Each (In a Bag of 1000)
units
Surface Mount Logic Gate 1.8V 1 8 DIP DC 30ns 30 mA 5 kVrms Yes - - 10ns
RS Stock No. 178-4829
Mfr. Part No.MCT62
€0.264
Each (In a Bag of 1000)
units
Through Hole Phototransistor 1.5V 2 8 PDIP, PDIP-W DC - 60 mA 5 kVrms - - 100 % -
RS Stock No. 166-1948
Mfr. Part No.4N33SR2M
€0.191
Each (On a Reel of 1000)
units
Surface Mount Darlington 1.5V 1 6 DIP - 5µs 3 A 1.5 kVrms Yes 500% - 100µs
RS Stock No. 169-8724
Mfr. Part No.MOC3022SM
€0.274
Each (In a Bag of 1000)
units
Surface Mount Phototriac 1.5V 1 6 DIP AC - 60 mA 5.3 kVrms Yes - - -
RS Stock No. 805-1214
Mfr. Part No.4N33SR2M
€0.445
Each (On a Tape of 10)
units
Surface Mount Darlington 1.5V 1 6 DIP - 5µs 3 A 1500 Vrms Yes 500% - 100µs
RS Stock No. 166-3307
Mfr. Part No.FOD817C3SD
€0.137
Each (On a Reel of 1000)
units
Surface Mount Phototransistor 1.4V 1 4 MDIP DC 18µs 50 mA 5 kVrms - 400% - 18µs
RS Stock No. 864-9057
Mfr. Part No.FOD260L
€0.682
Each (In a Pack of 5)
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 22ns 50 mA 5000 Vrms Yes - - 3ns
RS Stock No. 803-0841
Mfr. Part No.6N137SM
€1.132
Each (In a Pack of 5)
units
Surface Mount Logic Gate 1.8V 1 8 DIP DC 30ns 30 mA 5000 Vrms Yes - - 10ns
RS Stock No. 806-5985
Mfr. Part No.MOC3022SR2M
€0.588
Each (In a Pack of 10)
units
Surface Mount Phototriac 1.5V 1 6 DIP AC - 60 mA 5300 Vrms Yes - - -
RS Stock No. 671-1450
Mfr. Part No.MOCD223M
€1.068
Each (In a Pack of 5)
units
Surface Mount Darlington 1.3V 2 8 SOIC DC 8µs 60 mA 2.5 kVrms - 1000% 500 % 110µs
RS Stock No. 807-5260
Mfr. Part No.CNY174SR2M
€0.47
Each (In a Pack of 20)
units
Surface Mount Phototransistor 1.65V 1 6 MDIP DC 6µs 60 mA 7500 V ac - - - 24µs
RS Stock No. 166-3643
Mfr. Part No.MOC205R2M
€0.141
Each (On a Reel of 2500)
units
Surface Mount Phototransistor 1.5V 1 8 SOIC DC 3.2µs 60 mA 2.5 kVrms - - - 4.7µs
RS Stock No. 145-4326
Mfr. Part No.FODM8061
€0.906
Each (In a Tube of 100)
units
Surface Mount Logic Gate 1.8V - 5 SO DC 20ns 50 mA 3.75 kVrms Yes - - 10ns
RS Stock No. 169-8727
Mfr. Part No.MOC3023VM
€0.189
Each (In a Bag of 1000)
units
Through Hole Phototriac 1.5V 1 6 DIP AC - 60 mA 5.3 kVrms Yes - - -